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2016-10-31perf symbols: Fixup symbol sizes before picking best onesArnaldo Carvalho de Melo
commit 432746f8e0b6a82ba832b771afe31abd51af6752 upstream. When we call symbol__fixup_duplicate() we use algorithms to pick the "best" symbols for cases where there are various functions/aliases to an address, and those check zero size symbols, which, before calling symbol__fixup_end() are _all_ symbols in a just parsed kallsyms file. So first fixup the end, then fixup the duplicates. Found while trying to figure out why 'perf test vmlinux' failed, see the output of 'perf test -v vmlinux' to see cases where the symbols picked as best for vmlinux don't match the ones picked for kallsyms. Cc: Anton Blanchard <anton@samba.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Fixes: 694bf407b061 ("perf symbols: Add some heuristics for choosing the best duplicate symbol") Link: http://lkml.kernel.org/n/tip-rxqvdgr0mqjdxee0kf8i2ufn@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-31perf symbols: Check symbol_conf.allow_aliases for kallsyms loading tooArnaldo Carvalho de Melo
commit c97b40e4d15f13a36cd037d598e45cbe9e1e5757 upstream. We can allow aliases to be kept, but we were checking this just when loading vmlinux files, be consistent, do it for any symbol table loading code that calls symbol__fixup_duplicate() by making this function check .allow_aliases instead. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Fixes: 680d926a8cb0 ("perf symbols: Allow symbol alias when loading map for symbol name") Link: http://lkml.kernel.org/n/tip-z0avp0s6cfjckc4xj3pdfjdz@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-31perf ui/stdio: Always reset output width for hierarchyNamhyung Kim
commit 9a6ad25b5a2026ba1399abc879ec623957867e79 upstream. When the --hierarchy option is used, each entry has its own hpp_list to show the result. But it is not updating the width of each column for perf-top. The perf-report command has no problem since it resets it during header display. $ sudo perf top --hierarchy --stdio PerfTop: 160 irqs/sec kernel:38.8% exact: 100.0% [4000Hz cycles:pp], (all, 12 CPUs) ---------------------------------------------------------------------- 52.32% perf 24.74% [.] __symbols__insert 5.62% [.] rb_next 5.14% [.] dso__load_sym Move the code into hists__fprintf() so that it can be called always. Also it'd be better to put similar code together. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Fixes: 1b2dbbf41a0f ("perf hists: Use own hpp_list for hierarchy mode") Link: http://lkml.kernel.org/r/20160913074552.13284-5-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-31perf ui/tui: Reset output width for hierarchyNamhyung Kim
commit 5ff3e7a224d40f9dd73625b91377787034a8b35e upstream. When --hierarchy option is used, each entry has its own hpp_list to show the result. But it missed to update width of each column. Before: - 46.29% 48.12% netctl-auto + 31.44% 29.25% [kernel.vmlinux] + 8.52% 11.55% libc-2.22.so + 5.19% 6.91% bash + 10.75% 11.83% wpa_cli + 8.25% 2.23% swapper + 6.45% 5.40% tr + 4.81% 8.09% awk + 4.15% 2.85% firefox + 3.86% 2.53% sh After: - 46.29% 48.12% netctl-auto + 31.44% 29.25% [kernel.vmlinux] + 8.52% 11.55% libc-2.22.so + 5.19% 6.91% bash + 10.75% 11.83% wpa_cli + 8.25% 2.23% swapper + 6.45% 5.40% tr + 4.81% 8.09% awk + 4.15% 2.85% firefox + 3.86% 2.53% sh Committer note: Full testing instructions: 1) Record with an event group: $ perf record -e '{cycles,instructions}' make -j4 2) Use report in hierarchy mode, to get a few expanded trees on the same screen, use --percent-limit: $ perf report --hierarchy --percent-limit 0.5 Samples: 103K of event 'anon group { cycles:u, instructions:u }', Event count (approx.): 57317631725 Overhead Command / Shared Object / Symbol ◆ - 58.89% 55.12% cc1 ▒ - 50.26% 48.10% cc1 ▒ 3.61% 5.13% [.] _cpp_lex_token ▒ 2.58% 0.78% [.] ht_lookup_with_hash ▒ 1.31% 1.30% [.] ggc_internal_alloc ▒ 1.08% 2.25% [.] get_combined_adhoc_loc ▒ 1.01% 1.95% [.] ira_init ▒ 0.96% 1.78% [.] linemap_position_for_column ▒ 0.65% 1.01% [.] cpp_get_token_with_location ▒ - 7.52% 6.58% libc-2.23.so ▒ 1.70% 1.78% [.] _int_malloc ▒ 0.69% 0.75% [.] _int_free ▒ 0.67% 0.42% [.] malloc_consolidate ▒ - 0.58% 0.42% ld-2.23.so ▒ no entry >= 0.50% ▒ - 0.52% 0.03% [kernel.vmlinux] ▒ no entry >= 0.50% ▒ Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: 1b2dbbf41a0f ("perf hists: Use own hpp_list for hierarchy mode") Link: http://lkml.kernel.org/r/20160920053025.13989-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-31perf powerpc: Fix build-test failureRavi Bangoria
commit 25b8592e912f085ce2ff736a2927584ddeab238c upstream. 'make -C tools/perf build-test' is failing with below log for poewrpc. In file included from /tmp/tmp.3eEwmGlYaF/perf-4.8.0-rc4/tools/perf/perf.h:15:0, from util/cpumap.h:8, from util/env.c:1: /tmp/tmp.3eEwmGlYaF/perf-4.8.0-rc4/tools/perf/perf-sys.h:23:56: fatal error: ../../arch/powerpc/include/uapi/asm/unistd.h: No such file or directory compilation terminated. I bisected it and found it's failing from commit ad430729ae00 ("Remove: kernel unistd*h files from perf's MANIFEST, not used"). Header file '../../arch/powerpc/include/uapi/asm/unistd.h' is included only for powerpc in tools/perf/perf-sys.h. By looking closly at commit history, I found little weird thing: Commit f2d9cae9ea9e ("perf powerpc: Use uapi/unistd.h to fix build error") replaced 'asm/unistd.h' with 'uapi/asm/unistd.h' Commit d2709c7ce4c5 ("perf: Make perf build for x86 with UAPI disintegration applied") removes all arch specific 'uapi/asm/unistd.h' for all archs and adds generic <asm/unistd.h>. Commit f0b9abfb0446 ("Merge branch 'linus' into perf/core") again includes 'uapi/asm/unistd.h' for powerpc. Don't know how exactly this happened as this change is not part of commit also. Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1472630591-5089-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com Fixes: ad430729ae00 ("Remove: kernel unistd*h files from perf's MANIFEST, not used") Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-31perf hists browser: Fix event group displayNamhyung Kim
commit d9ea48bc4e7cc297ca1073fa3f90ed80d964b7b4 upstream. Milian reported that the event group on TUI shows duplicated overhead. This was due to a bug on calculating hpp->buf position. The hpp_advance() was called from __hpp__slsmg_color_printf() on TUI but it's already called from the hpp__call_print_fn macro in __hpp__fmt(). The end result is that the print function returns number of bytes it printed but the buffer advanced twice of the length. This is generally not a problem since it doesn't need to access the buffer again. But with event group, overhead needs to be printed multiple times and hist_entry__snprintf_alignment() tries to fill the space with buffer after it printed. So it (brokenly) showed the last overhead again. The bug was there from the beginning, but I think it's only revealed when the alignment function was added. Reported-by: Milian Wolff <milian.wolff@kdab.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Fixes: 89fee7094323 ("perf hists: Do column alignment on the format iterator") Link: http://lkml.kernel.org/r/20160912061958.16656-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-31perf data: Fix building in 32 bit platform with libbabeltraceWang Nan
commit f2c8852e6e990fcab0d9e68de9d86e5fbea0b5dc upstream. On ARM32 building it report following error when we build with libbabeltrace: util/data-convert-bt.c: In function 'add_bpf_output_values': util/data-convert-bt.c:440:3: error: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'unsigned int' [-Werror=format] cc1: all warnings being treated as errors Fix it by changing %lu to %zu. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Fixes: 6122d57e9f7c ("perf data: Support converting data from bpf_perf_event_output()") Link: http://lkml.kernel.org/r/1475035126-146587-1-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-28perf intel-pt: Fix MTC timestamp calculation for large MTC periodsAdrian Hunter
commit 3bccbe20f6d188ce7b00326e776b745cfd35b10a upstream. The MTC packet provides a 8-bit slice of CTC which is related to TSC by the TMA packet, however the TMA packet only provides the lower 16 bits of CTC. If mtc_shift > 8 then some of the MTC bits are not in the CTC provided by the TMA packet. Fix-up the last_mtc calculated from the TMA packet by copying the missing bits from the current MTC assuming the least difference between the two, and that the current MTC comes after last_mtc. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1475062896-22274-2-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-28perf intel-pt: Fix estimated timestamps for cycle-accurate modeAdrian Hunter
commit 51ee6481fa8e879cc942bcc1b0af713e158b7a98 upstream. In cycle-accurate mode, timestamps can be calculated from CYC packets. The decoder also estimates timestamps based on the number of instructions since the last timestamp. For that to work in cycle-accurate mode, the instruction count needs to be reset to zero when a timestamp is calculated from a CYC packet, but that wasn't happening, so fix it. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1475062896-22274-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-28perf intel-pt: Fix snapshot overlap detection decoder errorsAdrian Hunter
commit 810c398bc09b2f2dfde52a7d2483a710612c5fb8 upstream. Fix occasional decoder errors decoding trace data collected in snapshot mode. Snapshot mode can take successive snapshots of trace which might overlap. The decoder checks whether there is an overlap but only looks at the current and previous buffer. However buffers that do not contain synchronization (i.e. PSB) packets cannot be decoded or used for overlap checking. That means the decoder actually needs to check overlaps between the current buffer and the previous buffer that contained usable data. Make that change. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Link: http://lkml.kernel.org/r/1474641528-18776-10-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-28spi: spidev_test: Fix buffer overflow in unescape()Geert Uytterhoeven
commit 0278b34bf15f8d8a609595b15909cd8622dd64ca upstream. Sometimes spidev_test crashes with: *** Error in `spidev_test': munmap_chunk(): invalid pointer: 0x00022020 *** Aborted or just Segmentation fault This is due to transfer_escaped_string() miscalculating the required size of the buffer by one byte, causing a buffer overflow in unescape(). Drop the bogus "+ 1" in the strlen() parameter to fix this. Note that unescape() never copies the zero-terminator of the source string, so it writes at most as many bytes as the length of the source string. Fixes: 30061915be6e3a2c (spi: spidev_test: Added input buffer from the terminal) Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-29Merge branch 'libnvdimm-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Pull libnvdimm fixes from Dan Williams: - Four fixes for "flush hint" support. Flush hints are addresses advertised by the ACPI 6+ NFIT (NVDIMM Firmware Interface Table) that when written and fenced guarantee that writes pending in platform write buffers (outside the cpu) have been flushed to media. They might also be used by hypervisors as a trigger condition to flush guest-persistent memory ranges to storage. Fix a potential data corruption issue, a broken definition of the hint array, a wrong allocation size for the unit test implementation of the flush hint table, and missing NULL check in an error path. The unit test, while it did not prevent these bugs from being merged, at least triggered occasional crashes in advance of production usages. - Fix handling of ACPI DSM error status results. The DSM mechanism allows communication with platform and memory device firmware. We correctly parse known errors, but were silently ignoring others. Fix it to consistently fail any command with a non-zero status return that we otherwise do not interpret / handle. * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: libnvdimm, region: fix flush hint table thinko nfit: fail DSMs that return non-zero status by default libnvdimm: fix devm_nvdimm_memremap() error path tools/testing/nvdimm: fix allocation range for mock flush hint tables nvdimm: fix PHYS_PFN/PFN_PHYS mixup
2016-09-25radix tree test suite: Test radix_tree_replace_slot() for multiorder entriesMatthew Wilcox
When we replace a multiorder entry, check that all indices reflect the new value. Also, compile the test suite with -O2, which shows other problems with the code due to some dodgy pointer operations in the radix tree code. Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-19tools/testing/nvdimm: fix allocation range for mock flush hint tablesDan Williams
Commit 480b6837aa57 "nvdimm: fix PHYS_PFN/PFN_PHYS mixup" identified that we were passing an invalid address to devm_nvdimm_ioremap(). With that fixed it exposed a bug in the memory reservation size for flush hint tables. Since we map a full page we need to mock a full page of memory to back the flush hint table entries. Cc: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-09-13Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Ingo Molnar: "Three fixes: - AMD microcode loading fix with randomization - an lguest tooling fix - and an APIC enumeration boundary condition fix" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/apic: Fix num_processors value in case of failure tools/lguest: Don't bork the terminal in case of wrong args x86/microcode/AMD: Fix load of builtin microcode with randomized memory
2016-09-09Merge tag 'iio-fixes-for-4.8b' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus Jonathan writes: Second set of IIO fixes for the 4.8 cycle. We have a big rework of the kxsd9 driver queued up behind the fix below and a fix for a recent fix that was marked for stable. Hence this fix series is perhaps a little more urgent than average for IIO. * core - a fix for a fix in the last set. The recent fix for blocking ops when ! task running left a path (unlikely one) in which the function return value was not set - so initialise it to 0. - The IIO_TYPE_FRACTIONAL code previously didn't cope with negative fractions. Turned out a fix for this was in Analog's tree but hadn't made it upstream. * bmc150 - reset chip at init time. At least one board out there ends up coming up in an unstable state due to noise during power up. The reset does no harm on other boards. * kxsd9 - Fix a bug in the reported scaling due to failing to set the integer part to 0. * hid-sensors-pressure - Output was in the wrong units to comply with the IIO ABI. * tools - iio_generic_buffer: Fix the trigger-less mode by ensuring we don't fault out for having no trigger when we explicitly said we didn't want to have one.
2016-09-08tools/lguest: Don't bork the terminal in case of wrong argsDaniel Baluta
Running lguest without arguments or with a wrong argument name borks the terminal, because the cleanup handler is set up too late in the initialization process. Signed-off-by: Daniel Baluta <daniel.baluta@intel.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-09-03Merge tag 'staging-4.8-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging/IIO driver fixes from Greg KH: "Here are a number of small fixes for staging and IIO drivers that resolve reported problems. Full details are in the shortlog. All of these have been in linux-next with no reported issues" * tag 'staging-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (35 commits) arm: dts: rockchip: add reset node for the exist saradc SoCs arm64: dts: rockchip: add reset saradc node for rk3368 SoCs iio: adc: rockchip_saradc: reset saradc controller before programming it iio: accel: kxsd9: Fix raw read return iio: adc: ti_am335x_adc: Increase timeout value waiting for ADC sample iio: adc: ti_am335x_adc: Protect FIFO1 from concurrent access include/linux: fix excess fence.h kernel-doc notation staging: wilc1000: correctly check if associatedsta has not been found staging: wilc1000: NULL dereference on error staging: wilc1000: txq_event: Fix coding error MAINTAINERS: Add file patterns for ion device tree bindings MAINTAINERS: Update maintainer entry for wilc1000 iio: chemical: atlas-ph-sensor: fix typo in val assignment iio: fix sched WARNING "do not call blocking ops when !TASK_RUNNING" staging: comedi: ni_mio_common: fix AO inttrig backwards compatibility staging: comedi: dt2811: fix a precedence bug staging: comedi: adv_pci1760: Do not return EINVAL for CMDF_ROUND_DOWN. staging: comedi: ni_mio_common: fix wrong insn_write handler staging: comedi: comedi_test: fix timer race conditions staging: comedi: daqboard2000: bug fix board type matching code ...
2016-08-29tools:iio:iio_generic_buffer: fix trigger-less modeGregor Boirie
Passing the trigger-less mode option on the command line causes iio_generic_buffer to fail searching for an IIO trigger. Fix this by skipping trigger initialization if trigger-less mode is requested. Technically it actually fixes: 7c7e9dad70 where the bug was introduced but as the window to the patch below that changes the context was very small let's mark it with that. Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Fixes: deb4d1fdcb5af ("iio: generic_buffer: Fix --trigger-num option") Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-08-28Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Thomas Gleixner: "A few fixes from the perf departement - prevent a imbalanced preemption disable in the events teardown code - prevent out of bound acces in perf userspace - make perf tools compile with UCLIBC again - a fix for the userspace unwinder utility" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/core: Use this_cpu_ptr() when stopping AUX events perf evsel: Do not access outside hw cache name arrays tools lib: Reinstate strlcpy() header guard with __UCLIBC__ perf unwind: Use addr_location::addr instead of ip for entries
2016-08-22Merge tag 'gpio-v4.8-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO fixes from Linus Walleij: "Here are a few GPIO fixes for v4.8. I was expecting some fallout from the new chardev rework but nothing like that turned up att all. Instead a Kconfig confusion that I think I have finally nailed, then some ordinary driver noise and trivia. This fixes a Kconfig issue with UM: when I made GPIOLIB available to all archs, that included UM, but the OF part of GPIOLIB requires HAS_IOMEM, so we add HAS_IOMEM as a dependency to OF_GPIO. This in turn exposed the fact that a few GPIO drivers were implicitly assuming OF_GPIO as their dependency but instead depended on OF alone (the typical problem being a pointer inside gpio_chip not existing unless OF_GPIO is selected) and then UM would fail to compile with these drivers instead. Then I lost patience and made any GPIO driver depending on just OF depend on OF_GPIO instead, that is certainly what they meant and the only thing that makes sense anyway. GPIO with just OF but !OF_GPIO does not make sense. Also a fix for the max730x driver data pointer, and a minor comment fix for the GPIO tools" * tag 'gpio-v4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio: make any OF dependent driver depend on OF_GPIO gpio: Fix OF build problem on UM gpio: max730x: set gpiochip data pointer before using it tools/gpio: fix gpio-event-mon header comment
2016-08-18Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "Mostly tooling fixes, but also start/stop filter related fixes, a perf event read() fix, a fix uncovered by fuzzing, and an uprobes leak fix" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/core: Check return value of the perf_event_read() IPI perf/core: Enable mapping of the stop filters perf/core: Update filters only on executable mmap perf/core: Fix file name handling for start/stop filters perf/core: Fix event_function_local() uprobes: Fix the memcg accounting perf intel-pt: Fix occasional decoding errors when tracing system-wide tools: Sync kvm related header files for arm64 and s390 perf probe: Release resources on error when handling exit paths perf probe: Check for dup and fdopen failures perf symbols: Fix annotation of objects with debuginfo files perf script: Don't disable use_callchain if input is pipe perf script: Show proper message when failed list scripts perf jitdump: Add the right header to get the major()/minor() definitions perf ppc64le: Fix build failure when libelf is not present perf tools mem: Fix -t store option for record command perf intel-pt: Fix ip compression
2016-08-18perf evsel: Do not access outside hw cache name arraysArnaldo Carvalho de Melo
We have to check if the values are >= *_MAX, not just >, fix it. From the bugzilla report: ''In file /tools/perf/util/evsel.c function __perf_evsel__hw_cache_name it appears that there is a bug that reads beyond the end of the buffer. The statement "if (type > PERF_COUNT_HW_CACHE_MAX)" allows type to be equal to the maximum value. Later, when statement "if (!perf_evsel__is_cache_op_valid(type, op))" is executed, the function can access array perf_evsel__hw_cache_stat[type] beyond the end of the buffer. It appears to me that the statement "if (type > PERF_COUNT_HW_CACHE_MAX)" should be "if (type >= PERF_COUNT_HW_CACHE_MAX)" Bug found with Coverity and manual code review. No attempts were made to execute the code with a maximum type value.'' Committer note: Testing it: $ perf record -e $(echo $(perf list cache | cut -d \[ -f1) | sed 's/ /,/g') usleep 1 [ perf record: Woken up 16 times to write data ] [ perf record: Captured and wrote 0.023 MB perf.data (34 samples) ] $ perf evlist L1-dcache-load-misses L1-dcache-loads L1-dcache-stores L1-icache-load-misses LLC-load-misses LLC-loads LLC-store-misses LLC-stores branch-load-misses branch-loads dTLB-load-misses dTLB-loads dTLB-store-misses dTLB-stores iTLB-load-misses iTLB-loads node-load-misses node-loads node-store-misses node-stores $ perf list cache List of pre-defined events (to be used in -e): L1-dcache-load-misses [Hardware cache event] L1-dcache-loads [Hardware cache event] L1-dcache-stores [Hardware cache event] L1-icache-load-misses [Hardware cache event] LLC-load-misses [Hardware cache event] LLC-loads [Hardware cache event] LLC-store-misses [Hardware cache event] LLC-stores [Hardware cache event] branch-load-misses [Hardware cache event] branch-loads [Hardware cache event] dTLB-load-misses [Hardware cache event] dTLB-loads [Hardware cache event] dTLB-store-misses [Hardware cache event] dTLB-stores [Hardware cache event] iTLB-load-misses [Hardware cache event] iTLB-loads [Hardware cache event] node-load-misses [Hardware cache event] node-loads [Hardware cache event] node-store-misses [Hardware cache event] node-stores [Hardware cache event] $ Reported-by: Brian Sweeney <bsweeney@lgsinnovations.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=153351 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-18tools lib: Reinstate strlcpy() header guard with __UCLIBC__Vineet Gupta
perf tools build in recent kernels spews splat when cross compiling with uClibc: | CC util/alias.o | In file included from tools/perf/util/../ui/../util/cache.h:8:0, | from tools/perf/util/../ui/helpline.h:7, | from tools/perf/util/debug.h:8, | from arch/../util/cpumap.h:9, | from arch/../util/env.h:5, | from arch/common.h:4, | from arch/common.c:3: | tools/include/linux/string.h:12:15: warning: redundant redeclaration of ‘strlcpy’ [-Wredundant-decls] | extern size_t strlcpy(char *dest, const char *src, size_t size); ^ This is after commit 61a6445e463a31 ("tools lib: Guard the strlcpy() header with __GLIBC__"). The problem is uClibc also defines __GLIBC__ for exported headers for applications. So add that specific check to not trip for uClibc. Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Petri Gynther <pgynther@google.com> Cc: Wang Nan <wangnan0@huawei.com> Cc: linux-snps-arc@lists.infradead.org Link: http://lkml.kernel.org/r/1471537703-16439-1-git-send-email-vgupta@synopsys.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-16Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds
Pull virtio/vhost fixes from Michael Tsirkin: - test fixes - a vsock fix * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: tools/virtio: add dma stubs vhost/test: fix after swiotlb changes vhost/vsock: drop space available check for TX vq ringtest: test build fix
2016-08-16perf unwind: Use addr_location::addr instead of ip for entriesMilian Wolff
This fixes the srcline translation for call chains of user space applications. Before we got: perf report --stdio --no-children -s sym,srcline -g address 8.92% [.] main mandelbrot.h:41 | |--3.70%--main +8390240 | __libc_start_main +139950056726769 | _start +8388650 | |--2.74%--main +8390189 | --2.08%--main +8390296 __libc_start_main +139950056726769 _start +8388650 7.59% [.] main complex:1326 | |--4.79%--main +8390203 | __libc_start_main +139950056726769 | _start +8388650 | --2.80%--main +8390219 7.12% [.] __muldc3 libgcc2.c:1945 | |--3.76%--__muldc3 +139950060519490 | main +8390224 | __libc_start_main +139950056726769 | _start +8388650 | --3.32%--__muldc3 +139950060519512 main +8390224 With this patch applied, we instead get: perf report --stdio --no-children -s sym,srcline -g address 8.92% [.] main mandelbrot.h:41 | |--3.70%--main mandelbrot.h:41 | __libc_start_main +241 | _start +4194346 | |--2.74%--main mandelbrot.h:41 | --2.08%--main mandelbrot.h:41 __libc_start_main +241 _start +4194346 7.59% [.] main complex:1326 | |--4.79%--main complex:1326 | __libc_start_main +241 | _start +4194346 | --2.80%--main complex:1326 7.12% [.] __muldc3 libgcc2.c:1945 | |--3.76%--__muldc3 libgcc2.c:1945 | main mandelbrot.h:39 | __libc_start_main +241 | _start +4194346 | --3.32%--__muldc3 libgcc2.c:1945 main mandelbrot.h:39 Suggested-and-Acked-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Milian Wolff <milian.wolff@kdab.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> LPU-Reference: 20160816153926.11288-1-milian.wolff@kdab.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-16Merge tag 'perf-urgent-for-mingo-20160815' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull perf/urgent fixes from Arnaldo Carvalho de Melo: - Fix occasional decoding errors when tracing system-wide with Intel PT (Adrian Hunter) - Fix ip compression in Intel PT for some specific packet types not present on current hardware (Adrian Hunter) - Fix annotation of objects with debuginfo files (Anton Blanchard) - Fix build on Fedora Rawhide (25) wrt using the right header to get the major() & minor() definitions in the jitdump code, now it is deprecated getting those using sys/types.h, one has to use sys/sysmacros.h (Arnaldo Carvalho de Melo) - Sync arm64/s390 kvm related header files (Arnaldo Carvalho de Melo) - Check for dup and fdopen failures in 'perf probe' (Colin Ian King, Arnaldo Carvalho de Melo) - Fix showing callchains in pipe mode, i.e. perf record -g -o - workload | perf script now shows callchains (He Kuang) - Show proper message when the scripts directory points to some invalid location in 'perf script --list' (He Kuang) - Fix 'perf mem -t store' to record 'cpu/mem-stores/P' events again (Jiri Olsa) - Fix ppc64le build failure when libelf is not present (Ravi Bangoria) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-08-15perf intel-pt: Fix occasional decoding errors when tracing system-wideAdrian Hunter
In order to successfully decode Intel PT traces, context switch events are needed from the moment the trace starts. Currently that is ensured by using the 'immediate' flag which enables the switch event when it is opened. However, since commit 86c2786994bd ("perf intel-pt: Add support for PERF_RECORD_SWITCH") that might not always happen. When tracing system-wide the context switch event is added to the tracking event which was not set as 'immediate'. Change that so it is. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: stable@vger.kernel.org # v4.4+ Fixes: 86c2786994bd ("perf intel-pt: Add support for PERF_RECORD_SWITCH") Link: http://lkml.kernel.org/r/1471245784-22580-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-15tools: Sync kvm related header files for arm64 and s390Arnaldo Carvalho de Melo
From a quick look nothing stands out as requiring changes to kvm tools such as tools/perf/arch/s390/util/kvm-stat.c. Silences these header checking warnings: $ make -C tools/perf make: Entering directory '/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j4' parallel build Warning: tools/arch/s390/include/uapi/asm/kvm.h differs from kernel Warning: tools/arch/s390/include/uapi/asm/sie.h differs from kernel Warning: tools/arch/arm64/include/uapi/asm/kvm.h differs from kernel <SNIP> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Hemant Kumar <hemant@linux.vnet.ibm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Scott Wood <scottwood@freescale.com> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-btutge414g516qmh6r5ienlj@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-15perf probe: Release resources on error when handling exit pathsArnaldo Carvalho de Melo
Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Colin King <colin.king@canonical.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-zh2j4iqimralugke5qq7dn6d@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-15perf probe: Check for dup and fdopen failuresColin Ian King
dup and fdopen can potentially fail, so add some extra error handling checks rather than assuming they always work. Signed-off-by: Colin King <colin.king@canonical.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1471038296-12956-1-git-send-email-colin.king@canonical.com [ Free resources when those functions (now being verified) fail ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-15perf symbols: Fix annotation of objects with debuginfo filesAnton Blanchard
Commit 73cdf0c6ea9c ("perf symbols: Record text offset in dso to calculate objdump address") started storing the offset of the text section for all DSOs: if (elf_section_by_name(elf, &ehdr, &tshdr, ".text", NULL)) dso->text_offset = tshdr.sh_addr - tshdr.sh_offset; Unfortunately this breaks debuginfo files, because we need to calculate the offset of the text section in the associated executable file. As a result perf annotate returns junk for all debuginfo files. Fix this by using runtime_ss->elf which should point at the executable when parsing a debuginfo file. Signed-off-by: Anton Blanchard <anton@samba.org> Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Tested-by: Wang Nan <wangnan0@huawei.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Cc: stable@vger.kernel.org # v4.6+ Fixes: 73cdf0c6ea9c ("perf symbols: Record text offset in dso to calculate objdump address") Link: http://lkml.kernel.org/r/20160813115533.6de17912@kryten Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-15perf script: Don't disable use_callchain if input is pipeHe Kuang
Because perf data from pipe do not have a header with evsel attr, we should not check that and disable symbol_conf.use_callchain. Otherwise, perf script won't show callchains even if the data stream contains callchain. Before: $ perf record -g -o - uname |perf script Linux [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.000 MB - ] uname 1828 182630.186578: 250000 cpu-clock: ..b9499 setup_arg_pages uname 1828 182630.186850: 250000 cpu-clock: ..83b20 ___might_sleep uname 1828 182630.187153: 250000 cpu-clock: ..4b6be file_map_prot_ch ... After: $ perf record -g -o - uname |perf script Linux [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.000 MB - ] uname 1833 182675.927099: 250000 cpu-clock: ba5520 _raw_spin_lock+0xfe200040 ([kernel.kallsyms]) 389dd4 expand_downwards+0xfe200154 ([kernel.kallsyms]) 389f34 expand_stack+0xfe200024 ([kernel.kallsyms]) 3b957e setup_arg_pages+0xfe20019e ([kernel.kallsyms]) 40c80f load_elf_binary+0xfe20042f ([kernel.kallsyms]) ... Signed-off-by: He Kuang <hekuang@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1470309943-153909-2-git-send-email-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-15perf script: Show proper message when failed list scriptsHe Kuang
Perf shows the usage message when perf scripts folder failed to open, which misleads users to let them think the command is being mistyped. This patch shows a proper message and guides users to check the PERF_EXEC_PATH environment variable in that case. Before: $ perf script --list Usage: perf script [<options>] or: perf script [<options>] record <script> [<record-options>] <command> or: perf script [<options>] report <script> [script-args] or: perf script [<options>] <script> [<record-options>] <command> or: perf script [<options>] <top-script> [script-args] -l, --list list available scripts After: $ perf script --list open(/home/user/perf-core/scripts) failed. Check for "PERF_EXEC_PATH" env to set scripts dir. Signed-off-by: He Kuang <hekuang@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1470309943-153909-1-git-send-email-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-15perf jitdump: Add the right header to get the major()/minor() definitionsArnaldo Carvalho de Melo
Noticed on Fedora Rawhide: $ gcc --version gcc (GCC) 6.1.1 20160721 (Red Hat 6.1.1-4) $ rpm -q glibc glibc-2.24.90-1.fc26.x86_64 $ CC /tmp/build/perf/util/jitdump.o util/jitdump.c: In function 'jit_repipe_code_load': util/jitdump.c:428:2: error: '__major_from_sys_types' is deprecated: In the GNU C Library, `major' is defined by <sys/sysmacros.h>. For historical compatibility, it is currently defined by <sys/types.h> as well, but we plan to remove this soon. To use `major', include <sys/sysmacros.h> directly. If you did not intend to use a system-defined macro `major', you should #undef it after including <sys/types.h>. [-Werror=deprecated-declarations] event->mmap2.maj = major(st.st_dev); ^~~~~ In file included from /usr/include/features.h:397:0, from /usr/include/sys/types.h:25, from util/jitdump.c:1: /usr/include/sys/sysmacros.h:87:1: note: declared here __SYSMACROS_DEFINE_MAJOR (__SYSMACROS_FST_IMPL_TEMPL) Fix it following that recomendation. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-3majvd0adhfr25rvx4v5e9te@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-15tools: iio: iio_generic_buffer: initialize channel array pointerAlison Schofield
Uninitialized channel pointer causes segmentation fault when we call free(channel) during cleanup() with no channels initialized. This happens when you exit early for usage errors. Initialize the pointer to NULL when it is declared. Signed-off-by: Alison Schofield <amsfield22@gmail.com> Cc: Daniel Baluta <daniel.baluta@gmail.com> Tested-by: Gregor Boirie <gregor.boirie@parrot.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-08-15tools/virtio: add dma stubsMichael S. Tsirkin
Fixes build after recent IOMMU-related changes, mustly by adding more stubs. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-08-15ringtest: test build fixMichael S. Tsirkin
Recent changes to ptr_ring broke the ringtest which lacks a likely() stub. Fix it up. Fixes: 982fb490c298896d15e9323a882f34a57c11ff56 ("ptr_ring: support zero length ring") Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-08-12Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "Mostly tooling fixes, plus two uncore-PMU fixes, an uprobes fix, a perf-cgroups fix and an AUX events fix" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel/uncore: Add enable_box for client MSR uncore perf/x86/intel/uncore: Fix uncore num_counters uprobes/x86: Fix RIP-relative handling of EVEX-encoded instructions perf/core: Set cgroup in CPU contexts for new cgroup events perf/core: Fix sideband list-iteration vs. event ordering NULL pointer deference crash perf probe ppc64le: Fix probe location when using DWARF perf probe: Add function to post process kernel trace events tools: Sync cpufeatures headers with the kernel toops: Sync tools/include/uapi/linux/bpf.h with the kernel tools: Sync cpufeatures.h and vmx.h with the kernel perf probe: Support signedness casting perf stat: Avoid skew when reading events perf probe: Fix module name matching perf probe: Adjust map->reloc offset when finding kernel symbol from map perf hists: Trim libtraceevent trace_seq buffers perf script: Add 'bpf-output' field to usage message
2016-08-12Merge branch 'libnvdimm-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Pull libnvdimm fixes from Dan Williams: - Fix for the nd_blk (NVDIMM Block Window Aperture) driver. A spec clarification requires the driver to mask off reserved bits in status register. This is tagged for -stable back to the v4.2 kernel. - Fix for a kernel crash in the nvdimm unit tests when module loading is interrupted with SIGTERM. Tagged for -stable since validation efforts external to Intel use the unit tests for qualifying backports. - Add a new 'size' sysfs attribute for the BTT (NVDIMM Block Translation Table) driver to make it symmetric with the other namespace personality drivers (PFN and DAX) that provide a size attribute for indicating how much namespace capacity is lost to metadata. The BTT change arrived at the start of the merge window and has appeared in a -next release. It can technically wait for 4.9, but it is small, fixes asymmetry in the libnvdimm-sysfs interface, and something I would have squeezed into the v4.8 pull request had it arrived a few days earlier. * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: tools/testing/nvdimm: fix SIGTERM vs hotplug crash nvdimm, btt: add a size attribute for BTTs libnvdimm, nd_blk: mask off reserved status bits
2016-08-12perf ppc64le: Fix build failure when libelf is not presentRavi Bangoria
arch__post_process_probe_trace_events() calls get_target_map() to prepare symbol table. get_target_map() is defined inside util/probe-event.c. probe-event.c will only get included in perf binary if CONFIG_LIBELF is set. Hence arch__post_process_probe_trace_events() needs to be defined inside #ifdef HAVE_LIBELF_SUPPORT to solve compilation error. Reported-and-Tested-by: Anton Blanchard <anton@samba.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/57ABFF88.8030905@linux.vnet.ibm.com [ Thunderbird MUA mangled it, fix that ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-12perf tools mem: Fix -t store option for record commandJiri Olsa
Michael reported 'perf mem -t store record' being broken. The reason is latest rework of this area: commit acbe613e0c03 ("perf tools: Add monitored events array") We don't mark perf_mem_events store record when -t store option is specified. Committer notes: Before: # perf mem -t store record usleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.020 MB perf.data (7 samples) ] # perf evlist cycles:ppp # After: # perf mem -t store record usleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.020 MB perf.data (7 samples) ] # perf evlist cpu/mem-stores/P # Reported-by: Michael Petlan <mpetlan@redhat.com> Signed-off-by: Jiri Olsa <jolsa@redhat.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Fixes: acbe613e0c03 ("perf tools: Add monitored events array") Link: http://lkml.kernel.org/r/1470905457-18311-1-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-12perf intel-pt: Fix ip compressionAdrian Hunter
The June 2015 Intel SDM introduced IP Compression types 4 and 6. Refer to section 36.4.2.2 Target IP (TIP) Packet - IP Compression. Existing Intel PT packet decoder did not support type 4, and got type 6 wrong. Because type 3 and type 4 have the same number of bytes, the packet 'count' has been changed from being the number of ip bytes to being the type code. That allows the Intel PT decoder to correctly decide whether to sign-extend or use the last ip. However that also meant the code had to be adjusted in a number of places. Currently hardware is not using the new compression types, so this fix has no effect on existing hardware. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1469005206-3049-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-10tools/testing/nvdimm: fix SIGTERM vs hotplug crashDan Williams
The unit tests crash when hotplug races the previous probe. This race requires that the loading of the nfit_test module be terminated with SIGTERM, and the module to be unloaded while the ars scan is still running. In contrast to the normal nfit driver, the unit test calls acpi_nfit_init() twice to simulate hotplug, whereas the nominal case goes through the acpi_nfit_notify() event handler. The acpi_nfit_notify() path is careful to flush the previous region registration before servicing the hotplug event. The unit test was missing this guarantee. BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffff810cdce7>] pwq_activate_delayed_work+0x47/0x170 [..] Call Trace: [<ffffffff810ce186>] pwq_dec_nr_in_flight+0x66/0xa0 [<ffffffff810ce490>] process_one_work+0x2d0/0x680 [<ffffffff810ce331>] ? process_one_work+0x171/0x680 [<ffffffff810ce88e>] worker_thread+0x4e/0x480 [<ffffffff810ce840>] ? process_one_work+0x680/0x680 [<ffffffff810ce840>] ? process_one_work+0x680/0x680 [<ffffffff810d5343>] kthread+0xf3/0x110 [<ffffffff8199846f>] ret_from_fork+0x1f/0x40 [<ffffffff810d5250>] ? kthread_create_on_node+0x230/0x230 Cc: <stable@vger.kernel.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-08-10selftests/powerpc: Specify we expect to build with std=gnu99Michael Ellerman
We have some tests that assume we're using std=gnu99, which is fine on most compilers, but some old compilers use a different default. So make it explicit that we want to use std=gnu99. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-08-09Merge tag 'perf-urgent-for-mingo-20160809' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull perf/urgent fixes from Arnaldo Carvalho de Melo: User visible fixes: - Fix the lookup for a kernel module in 'perf probe', fixing for instance, the erroneous return of "[raid10]" when looking for "[raid1]" (Konstantin Khlebnikov) - Disable counters in a group before reading them in 'perf stat', to avoid skew (Mark Rutland) - Fix adding probes to function aliases in systems using kaslr (Masami Hiramatsu) - Trip libtraceevent trace_seq buffers, removing unnecessary memory usage that could bring a system using tracepoint events with 'perf top' to a crawl, as the trace_seq buffers start at a whooping 4 KB, which is very rarely used in perf's usecases, so realloc it to the really used space as a last measure after using libtraceevent functions to format the fields of tracepoint events (Arnaldo Carvalho de Melo) - Fix 'perf probe' location when using DWARF on ppc64le (Ravi Bangoria) - Allow specifying signedness casts to a 'perf probe' variable, to shorten the number of steps to see signed values that otherwise would always appear as hex values (Naohiro Aota) Documentation fixes: - Add 'bpf-output' field to 'perf script' usage message (Brendan Gregg) Infrastructure fixes: - Sync kernel header files: cpufeatures.h, {disabled,required}-features.h, bpf.h and vmx.h, so that we get a clean build, without warnings about files being different from the kernel counterparts. A verification of the need or desirability of changes in tools/ based on what was done in the kernel changesets was made and documented in the respective file sync changesets (Arnaldo Carvalho de Melo) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-08-09perf probe ppc64le: Fix probe location when using DWARFRavi Bangoria
Powerpc has Global Entry Point and Local Entry Point for functions. LEP catches call from both the GEP and the LEP. Symbol table of ELF contains GEP and Offset from which we can calculate LEP, but debuginfo does not have LEP info. Currently, perf prioritize symbol table over dwarf to probe on LEP for ppc64le. But when user tries to probe with function parameter, we fall back to using dwarf(i.e. GEP) and when function called via LEP, probe will never hit. For example: $ objdump -d vmlinux ... do_sys_open(): c0000000002eb4a0: e8 00 4c 3c addis r2,r12,232 c0000000002eb4a4: 60 00 42 38 addi r2,r2,96 c0000000002eb4a8: a6 02 08 7c mflr r0 c0000000002eb4ac: d0 ff 41 fb std r26,-48(r1) $ sudo ./perf probe do_sys_open $ sudo cat /sys/kernel/debug/tracing/kprobe_events p:probe/do_sys_open _text+3060904 $ sudo ./perf probe 'do_sys_open filename:string' $ sudo cat /sys/kernel/debug/tracing/kprobe_events p:probe/do_sys_open _text+3060896 filename_string=+0(%gpr4):string For second case, perf probed on GEP. So when function will be called via LEP, probe won't hit. $ sudo ./perf record -a -e probe:do_sys_open ls [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.195 MB perf.data ] To resolve this issue, let's not prioritize symbol table, let perf decide what it wants to use. Perf is already converting GEP to LEP when it uses symbol table. When perf uses debuginfo, let it find LEP offset form symbol table. This way we fall back to probe on LEP for all cases. After patch: $ sudo ./perf probe 'do_sys_open filename:string' $ sudo cat /sys/kernel/debug/tracing/kprobe_events p:probe/do_sys_open _text+3060904 filename_string=+0(%gpr4):string $ sudo ./perf record -a -e probe:do_sys_open ls [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.197 MB perf.data (11 samples) ] Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1470723805-5081-2-git-send-email-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-09perf probe: Add function to post process kernel trace eventsRavi Bangoria
Instead of inline code, introduce function to post process kernel probe trace events. Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1470723805-5081-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-09tools: Sync cpufeatures headers with the kernelArnaldo Carvalho de Melo
Due to: 1e61f78baf89 ("x86/cpufeature: Make sure DISABLED/REQUIRED macros are updated") No changes to tools using those headers (tools/arch/x86/lib/mem{set,cpu}_64.S) seems necessary. Detected by the tools build header drift checker: $ make -C tools/perf O=/tmp/build/perf make: Entering directory '/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j4' parallel build GEN /tmp/build/perf/common-cmds.h Warning: tools/arch/x86/include/asm/disabled-features.h differs from kernel Warning: tools/arch/x86/include/asm/required-features.h differs from kernel Warning: tools/arch/x86/include/asm/cpufeatures.h differs from kernel CC /tmp/build/perf/util/probe-finder.o CC /tmp/build/perf/builtin-help.o <SNIP> ^C$ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-ja75m7zk8j0jkzmrv16i5ehw@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-08-09toops: Sync tools/include/uapi/linux/bpf.h with the kernelArnaldo Carvalho de Melo
The way we're using kernel headers in tools/ now, with a copy that is made to the same path prefixed by "tools/" plus checking if that copy got stale, i.e. if the kernel counterpart changed, helps in keeping track with new features that may be useful for tools to exploit. For instance, looking at all the changes to bpf.h since it was last copied to tools/include brings this to toolers' attention: Need to investigate this one to check how to run a program via perf, setting up a BPF event, that will take advantage of the way perf already calls clang/LLVM, sets up the event and runs the workload in a single command line, helping in debugging such semi cooperative programs: 96ae52279594 ("bpf: Add bpf_probe_write_user BPF helper to be called in tracers") This one needs further investigation about using the feature it improves in 'perf trace' to do some tcpdumpin' mixed with syscalls, tracepoints, probe points, callgraphs, etc: 555c8a8623a3 ("bpf: avoid stack copy and use skb ctx for event output") Add tracing just packets that are related to some container to that mix: 4a482f34afcc ("cgroup: bpf: Add bpf_skb_in_cgroup_proto") 4ed8ec521ed5 ("cgroup: bpf: Add BPF_MAP_TYPE_CGROUP_ARRAY") Definetely needs to have example programs accessing task_struct from a bpf proggie started from 'perf trace': 606274c5abd8 ("bpf: introduce bpf_get_current_task() helper") Core networking related, XDP: 6ce96ca348a9 ("bpf: add XDP_TX xdp_action for direct forwarding") 6a773a15a1e8 ("bpf: add XDP prog type for early driver filter") 13c5c240f789 ("bpf: add bpf_get_hash_recalc helper") d2485c4242a8 ("bpf: add bpf_skb_change_type helper") 6578171a7ff0 ("bpf: add bpf_skb_change_proto helper") Changes detected by the tools build system: $ make -C tools/perf O=/tmp/build/perf install-bin make: Entering directory '/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j4' parallel build Warning: tools/include/uapi/linux/bpf.h differs from kernel INSTALL GTK UI CC /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o <SNIP> $ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Brenden Blanco <bblanco@plumgrid.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David Ahern <dsahern@gmail.com> Cc: David S. Miller <davem@davemloft.net> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Sargun Dhillon <sargun@sargun.me> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-difq4ts1xvww6eyfs9e7zlft@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-27 22:30:56 +0000