diff options
authorRichard Purdie <>2021-05-19 12:43:22 +0100
committerRichard Purdie <>2021-05-22 10:03:10 +0100
commited3924ef841183f79a2a496578aef4189052b824 (patch)
parent225a30f8d2bac142ea88cd28e5f52cd061523c83 (diff)
glibc: Add 8GB VM usage cap for usermode test suite
We've noticed that: MACHINE=qemuarm oe-selftest -r glibc.GlibcSelfTest.test_glibc ends up with one process growing to about the size of system memory and triggering the OOM killer. This has been taking out other builds running on the system on the autobuilders and is one cause of our intermittent failures. This was tracked down to: WORKDIR=XXX/tmp/work/armv7vet2hf-neon-poky-linux-gnueabi/glibc-testsuite/2.33-r0 BUILDDIR=$WORKDIR/build-arm-poky-linux-gnueabi QEMU_SYSROOT=$WORKDIR/recipe-sysroot QEMU_OPTIONS="$WORKDIR/recipe-sysroot-native/usr/bin/qemu-arm -r 3.2.0" \ $WORKDIR/check-test-wrapper user env GCONV_PATH=$BUILDDIR/iconvdata LOCPATH=$BUILDDIR/localedata LC_ALL=C $BUILDDIR/elf/ \ --library-path $BUILDDIR:$BUILDDIR/math:$BUILDDIR/elf:$BUILDDIR/dlfcn:$BUILDDIR/nss:$BUILDDIR/nis:$BUILDDIR/rt:$BUILDDIR/resolv:$BUILDDIR/mathvec:$BUILDDIR/support:$BUILDDIR/nptl \ $BUILDDIR/nptl/tst-pthread-timedlock-lockloop although other glibc tests appear to use 16GB of memory before failing anyway. By capping the VM size to 8GB, we see the same number of failures but no OOM situations. There may be some issue in qemu or the test which could be improved to avoid this entirely but this provides a necessary and useful safeguard to other builds and doensn't appear to make the situation worse. On a loaded system OOM may not occur as the test timeout may be triggered first. An experiment with a 5GB limit showed an additional 7 failures. (From OE-Core rev: 0dfbc94bb61095138c3d3ff026b2981f0061c1ca) Signed-off-by: Richard Purdie <>
1 files changed, 9 insertions, 0 deletions
diff --git a/meta/recipes-core/glibc/glibc/check-test-wrapper b/meta/recipes-core/glibc/glibc/check-test-wrapper
index f8e04e02d2..6ec9b9b29e 100644
--- a/meta/recipes-core/glibc/glibc/check-test-wrapper
+++ b/meta/recipes-core/glibc/glibc/check-test-wrapper
@@ -2,6 +2,7 @@
import sys
import os
import subprocess
+import resource
env = os.environ.copy()
args = sys.argv[1:]
@@ -44,6 +45,14 @@ if targettype == "user":
qemuargs += ["-L", sysroot]
qemuargs += ["-E", "LD_LIBRARY_PATH={}".format(":".join(libpaths))]
command = qemuargs + args
+ # We've seen qemu-arm using up all system memory for some glibc
+ # tests e.g. nptl/tst-pthread-timedlock-lockloop
+ # Cap at 8GB since no test should need more than that
+ # (5GB adds 7 failures for qemuarm glibc test run)
+ limit = 8*1024*1024*1024
+ resource.setrlimit(resource.RLIMIT_AS, (limit, limit))
elif targettype == "ssh":
host = os.environ.get("SSH_HOST", None)
user = os.environ.get("SSH_HOST_USER", None)