#define _XOPEN_SOURCE 500 /* needed for nftw() */ #define _GNU_SOURCE /* needed for asprintf() */ /* Parse event JSON files */ /* * Copyright (c) 2014, Intel Corporation * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include /* getrlimit */ #include /* getrlimit */ #include #include #include #include "jsmn.h" #include "json.h" #include "jevents.h" int verbose; char *prog; int eprintf(int level, int var, const char *fmt, ...) { int ret; va_list args; if (var < level) return 0; va_start(args, fmt); ret = vfprintf(stderr, fmt, args); va_end(args); return ret; } __attribute__((weak)) char *get_cpu_str(void) { return NULL; } static void addfield(char *map, char **dst, const char *sep, const char *a, jsmntok_t *bt) { unsigned int len = strlen(a) + 1 + strlen(sep); int olen = *dst ? strlen(*dst) : 0; int blen = bt ? json_len(bt) : 0; char *out; out = realloc(*dst, len + olen + blen); if (!out) { /* Don't add field in this case */ return; } *dst = out; if (!olen) *(*dst) = 0; else strcat(*dst, sep); strcat(*dst, a); if (bt) strncat(*dst, map + bt->start, blen); } static void fixname(char *s) { for (; *s; s++) *s = tolower(*s); } static void fixdesc(char *s) { char *e = s + strlen(s); /* Remove trailing dots that look ugly in perf list */ --e; while (e >= s && isspace(*e)) --e; if (*e == '.') *e = 0; } /* Add escapes for '\' so they are proper C strings. */ static char *fixregex(char *s) { int len = 0; int esc_count = 0; char *fixed = NULL; char *p, *q; /* Count the number of '\' in string */ for (p = s; *p; p++) { ++len; if (*p == '\\') ++esc_count; } if (esc_count == 0) return s; /* allocate space for a new string */ fixed = (char *) malloc(len + esc_count + 1); if (!fixed) return NULL; /* copy over the characters */ q = fixed; for (p = s; *p; p++) { if (*p == '\\') { *q = '\\'; ++q; } *q = *p; ++q; } *q = '\0'; return fixed; } static struct msrmap { const char *num; const char *pname; } msrmap[] = { { "0x3F6", "ldlat=" }, { "0x1A6", "offcore_rsp=" }, { "0x1A7", "offcore_rsp=" }, { "0x3F7", "frontend=" }, { NULL, NULL } }; static struct field { const char *field; const char *kernel; } fields[] = { { "UMask", "umask=" }, { "CounterMask", "cmask=" }, { "Invert", "inv=" }, { "AnyThread", "any=" }, { "EdgeDetect", "edge=" }, { "SampleAfterValue", "period=" }, { "FCMask", "fc_mask=" }, { "PortMask", "ch_mask=" }, { NULL, NULL } }; static void cut_comma(char *map, jsmntok_t *newval) { int i; /* Cut off everything after comma */ for (i = newval->start; i < newval->end; i++) { if (map[i] == ',') newval->end = i; } } static int match_field(char *map, jsmntok_t *field, int nz, char **event, jsmntok_t *val) { struct field *f; jsmntok_t newval = *val; for (f = fields; f->field; f++) if (json_streq(map, field, f->field) && nz) { cut_comma(map, &newval); addfield(map, event, ",", f->kernel, &newval); return 1; } return 0; } static struct msrmap *lookup_msr(char *map, jsmntok_t *val) { jsmntok_t newval = *val; static bool warned; int i; cut_comma(map, &newval); for (i = 0; msrmap[i].num; i++) if (json_streq(map, &newval, msrmap[i].num)) return &msrmap[i]; if (!warned) { warned = true; pr_err("%s: Unknown MSR in event file %.*s\n", prog, json_len(val), map + val->start); } return NULL; } static struct map { const char *json; const char *perf; } unit_to_pmu[] = { { "CBO", "uncore_cbox" }, { "QPI LL", "uncore_qpi" }, { "SBO", "uncore_sbox" }, { "iMPH-U", "uncore_arb" }, { "CPU-M-CF", "cpum_cf" }, { "CPU-M-SF", "cpum_sf" }, { "UPI LL", "uncore_upi" }, { "hisi_sccl,ddrc", "hisi_sccl,ddrc" }, { "hisi_sccl,hha", "hisi_sccl,hha" }, { "hisi_sccl,l3c", "hisi_sccl,l3c" }, { "L3PMC", "amd_l3" }, {} }; static const char *field_to_perf(struct map *table, char *map, jsmntok_t *val) { int i; for (i = 0; table[i].json; i++) { if (json_streq(map, val, table[i].json)) return table[i].perf; } return NULL; } #define EXPECT(e, t, m) do { if (!(e)) { \ jsmntok_t *loc = (t); \ if (!(t)->start && (t) > tokens) \ loc = (t) - 1; \ pr_err("%s:%d: " m ", got %s\n", fn, \ json_line(map, loc), \ json_name(t)); \ err = -EIO; \ goto out_free; \ } } while (0) static char *topic; static char *get_topic(void) { char *tp; int i; /* tp is free'd in process_one_file() */ i = asprintf(&tp, "%s", topic); if (i < 0) { pr_info("%s: asprintf() error %s\n", prog); return NULL; } for (i = 0; i < (int) strlen(tp); i++) { char c = tp[i]; if (c == '-') tp[i] = ' '; else if (c == '.') { tp[i] = '\0'; break; } } return tp; } static int add_topic(char *bname) { free(topic); topic = strdup(bname); if (!topic) { pr_info("%s: strdup() error %s for file %s\n", prog, strerror(errno), bname); return -ENOMEM; } return 0; } struct perf_entry_data { FILE *outfp; char *topic; }; static int close_table; static void print_events_table_prefix(FILE *fp, const char *tblname) { fprintf(fp, "struct pmu_event %s[] = {\n", tblname); close_table = 1; } static int print_events_table_entry(void *data, char *name, char *event, char *desc, char *long_desc, char *pmu, char *unit, char *perpkg, char *metric_expr, char *metric_name, char *metric_group) { struct perf_entry_data *pd = data; FILE *outfp = pd->outfp; char *topic = pd->topic; /* * TODO: Remove formatting chars after debugging to reduce * string lengths. */ fprintf(outfp, "{\n"); if (name) fprintf(outfp, "\t.name = \"%s\",\n", name); if (event) fprintf(outfp, "\t.event = \"%s\",\n", event); fprintf(outfp, "\t.desc = \"%s\",\n", desc); fprintf(outfp, "\t.topic = \"%s\",\n", topic); if (long_desc && long_desc[0]) fprintf(outfp, "\t.long_desc = \"%s\",\n", long_desc); if (pmu) fprintf(outfp, "\t.pmu = \"%s\",\n", pmu); if (unit) fprintf(outfp, "\t.unit = \"%s\",\n", unit); if (perpkg) fprintf(outfp, "\t.perpkg = \"%s\",\n", perpkg); if (metric_expr) fprintf(outfp, "\t.metric_expr = \"%s\",\n", metric_expr); if (metric_name) fprintf(outfp, "\t.metric_name = \"%s\",\n", metric_name); if (metric_group) fprintf(outfp, "\t.metric_group = \"%s\",\n", metric_group); fprintf(outfp, "},\n"); return 0; } struct event_struct { struct list_head list; char *name; char *event; char *desc; char *long_desc; char *pmu; char *unit; char *perpkg; char *metric_expr; char *metric_name; char *metric_group; }; #define ADD_EVENT_FIELD(field) do { if (field) { \ es->field = strdup(field); \ if (!es->field) \ goto out_free; \ } } while (0) #define FREE_EVENT_FIELD(field) free(es->field) #define TRY_FIXUP_FIELD(field) do { if (es->field && !*field) {\ *field = strdup(es->field); \ if (!*field) \ return -ENOMEM; \ } } while (0) #define FOR_ALL_EVENT_STRUCT_FIELDS(op) do { \ op(name); \ op(event); \ op(desc); \ op(long_desc); \ op(pmu); \ op(unit); \ op(perpkg); \ op(metric_expr); \ op(metric_name); \ op(metric_group); \ } while (0) static LIST_HEAD(arch_std_events); static void free_arch_std_events(void) { struct event_struct *es, *next; list_for_each_entry_safe(es, next, &arch_std_events, list) { FOR_ALL_EVENT_STRUCT_FIELDS(FREE_EVENT_FIELD); list_del_init(&es->list); free(es); } } static int save_arch_std_events(void *data, char *name, char *event, char *desc, char *long_desc, char *pmu, char *unit, char *perpkg, char *metric_expr, char *metric_name, char *metric_group) { struct event_struct *es; es = malloc(sizeof(*es)); if (!es) return -ENOMEM; memset(es, 0, sizeof(*es)); FOR_ALL_EVENT_STRUCT_FIELDS(ADD_EVENT_FIELD); list_add_tail(&es->list, &arch_std_events); return 0; out_free: FOR_ALL_EVENT_STRUCT_FIELDS(FREE_EVENT_FIELD); free(es); return -ENOMEM; } static void print_events_table_suffix(FILE *outfp) { fprintf(outfp, "{\n"); fprintf(outfp, "\t.name = 0,\n"); fprintf(outfp, "\t.event = 0,\n"); fprintf(outfp, "\t.desc = 0,\n"); fprintf(outfp, "},\n"); fprintf(outfp, "};\n"); close_table = 0; } static struct fixed { const char *name; const char *event; } fixed[] = { { "inst_retired.any", "event=0xc0,period=2000003" }, { "inst_retired.any_p", "event=0xc0,period=2000003" }, { "cpu_clk_unhalted.ref", "event=0x0,umask=0x03,period=2000003" }, { "cpu_clk_unhalted.thread", "event=0x3c,period=2000003" }, { "cpu_clk_unhalted.core", "event=0x3c,period=2000003" }, { "cpu_clk_unhalted.thread_any", "event=0x3c,any=1,period=2000003" }, { NULL, NULL}, }; /* * Handle different fixed counter encodings between JSON and perf. */ static char *real_event(const char *name, char *event) { int i; if (!name) return NULL; for (i = 0; fixed[i].name; i++) if (!strcasecmp(name, fixed[i].name)) return (char *)fixed[i].event; return event; } static int try_fixup(const char *fn, char *arch_std, char **event, char **desc, char **name, char **long_desc, char **pmu, char **filter, char **perpkg, char **unit, char **metric_expr, char **metric_name, char **metric_group, unsigned long long eventcode) { /* try to find matching event from arch standard values */ struct event_struct *es; list_for_each_entry(es, &arch_std_events, list) { if (!strcmp(arch_std, es->name)) { if (!eventcode && es->event) { /* allow EventCode to be overridden */ free(*event); *event = NULL; } FOR_ALL_EVENT_STRUCT_FIELDS(TRY_FIXUP_FIELD); return 0; } } pr_err("%s: could not find matching %s for %s\n", prog, arch_std, fn); return -1; } /* Call func with each event in the json file */ int json_events(const char *fn, int (*func)(void *data, char *name, char *event, char *desc, char *long_desc, char *pmu, char *unit, char *perpkg, char *metric_expr, char *metric_name, char *metric_group), void *data) { int err; size_t size; jsmntok_t *tokens, *tok; int i, j, len; char *map; char buf[128]; if (!fn) return -ENOENT; tokens = parse_json(fn, &map, &size, &len); if (!tokens) return -EIO; EXPECT(tokens->type == JSMN_ARRAY, tokens, "expected top level array"); tok = tokens + 1; for (i = 0; i < tokens->size; i++) { char *event = NULL, *desc = NULL, *name = NULL; char *long_desc = NULL; char *extra_desc = NULL; char *pmu = NULL; char *filter = NULL; char *perpkg = NULL; char *unit = NULL; char *metric_expr = NULL; char *metric_name = NULL; char *metric_group = NULL; char *arch_std = NULL; unsigned long long eventcode = 0; struct msrmap *msr = NULL; jsmntok_t *msrval = NULL; jsmntok_t *precise = NULL; jsmntok_t *obj = tok++; EXPECT(obj->type == JSMN_OBJECT, obj, "expected object"); for (j = 0; j < obj->size; j += 2) { jsmntok_t *field, *val; int nz; char *s; field = tok + j; EXPECT(field->type == JSMN_STRING, tok + j, "Expected field name"); val = tok + j + 1; EXPECT(val->type == JSMN_STRING, tok + j + 1, "Expected string value"); nz = !json_streq(map, val, "0"); if (match_field(map, field, nz, &event, val)) { /* ok */ } else if (json_streq(map, field, "EventCode")) { char *code = NULL; addfield(map, &code, "", "", val); eventcode |= strtoul(code, NULL, 0); free(code); } else if (json_streq(map, field, "ExtSel")) { char *code = NULL; addfield(map, &code, "", "", val); eventcode |= strtoul(code, NULL, 0) << 8; free(code); } else if (json_streq(map, field, "EventName")) { addfield(map, &name, "", "", val); } else if (json_streq(map, field, "BriefDescription")) { addfield(map, &desc, "", "", val); fixdesc(desc); } else if (json_streq(map, field, "PublicDescription")) { addfield(map, &long_desc, "", "", val); fixdesc(long_desc); } else if (json_streq(map, field, "PEBS") && nz) { precise = val; } else if (json_streq(map, field, "MSRIndex") && nz) { msr = lookup_msr(map, val); } else if (json_streq(map, field, "MSRValue")) { msrval = val; } else if (json_streq(map, field, "Errata") && !json_streq(map, val, "null")) { addfield(map, &extra_desc, ". ", " Spec update: ", val); } else if (json_streq(map, field, "Data_LA") && nz) { addfield(map, &extra_desc, ". ", " Supports address when precise", NULL); } else if (json_streq(map, field, "Unit")) { const char *ppmu; ppmu = field_to_perf(unit_to_pmu, map, val); if (ppmu) { pmu = strdup(ppmu); } else { if (!pmu) pmu = strdup("uncore_"); addfield(map, &pmu, "", "", val); for (s = pmu; *s; s++) *s = tolower(*s); } addfield(map, &desc, ". ", "Unit: ", NULL); addfield(map, &desc, "", pmu, NULL); addfield(map, &desc, "", " ", NULL); } else if (json_streq(map, field, "Filter")) { addfield(map, &filter, "", "", val); } else if (json_streq(map, field, "ScaleUnit")) { addfield(map, &unit, "", "", val); } else if (json_streq(map, field, "PerPkg")) { addfield(map, &perpkg, "", "", val); } else if (json_streq(map, field, "MetricName")) { addfield(map, &metric_name, "", "", val); } else if (json_streq(map, field, "MetricGroup")) { addfield(map, &metric_group, "", "", val); } else if (json_streq(map, field, "MetricExpr")) { addfield(map, &metric_expr, "", "", val); for (s = metric_expr; *s; s++) *s = tolower(*s); } else if (json_streq(map, field, "ArchStdEvent")) { addfield(map, &arch_std, "", "", val); for (s = arch_std; *s; s++) *s = tolower(*s); } /* ignore unknown fields */ } if (precise && desc && !strstr(desc, "(Precise Event)")) { if (json_streq(map, precise, "2")) addfield(map, &extra_desc, " ", "(Must be precise)", NULL); else addfield(map, &extra_desc, " ", "(Precise event)", NULL); } snprintf(buf, sizeof buf, "event=%#llx", eventcode); addfield(map, &event, ",", buf, NULL); if (desc && extra_desc) addfield(map, &desc, " ", extra_desc, NULL); if (long_desc && extra_desc) addfield(map, &long_desc, " ", extra_desc, NULL); if (filter) addfield(map, &event, ",", filter, NULL); if (msr != NULL) addfield(map, &event, ",", msr->pname, msrval); if (name) fixname(name); if (arch_std) { /* * An arch standard event is referenced, so try to * fixup any unassigned values. */ err = try_fixup(fn, arch_std, &event, &desc, &name, &long_desc, &pmu, &filter, &perpkg, &unit, &metric_expr, &metric_name, &metric_group, eventcode); if (err) goto free_strings; } err = func(data, name, real_event(name, event), desc, long_desc, pmu, unit, perpkg, metric_expr, metric_name, metric_group); free_strings: free(event); free(desc); free(name); free(long_desc); free(extra_desc); free(pmu); free(filter); free(perpkg); free(unit); free(metric_expr); free(metric_name); free(metric_group); free(arch_std); if (err) break; tok += j; } EXPECT(tok - tokens == len, tok, "unexpected objects at end"); err = 0; out_free: free_json(map, size, tokens); return err; } static char *file_name_to_table_name(char *fname) { unsigned int i; int n; int c; char *tblname; /* * Ensure tablename starts with alphabetic character. * Derive rest of table name from basename of the JSON file, * replacing hyphens and stripping out .json suffix. */ n = asprintf(&tblname, "pme_%s", fname); if (n < 0) { pr_info("%s: asprintf() error %s for file %s\n", prog, strerror(errno), fname); return NULL; } for (i = 0; i < strlen(tblname); i++) { c = tblname[i]; if (c == '-' || c == '/') tblname[i] = '_'; else if (c == '.') { tblname[i] = '\0'; break; } else if (!isalnum(c) && c != '_') { pr_err("%s: Invalid character '%c' in file name %s\n", prog, c, basename(fname)); free(tblname); tblname = NULL; break; } } return tblname; } static void print_mapping_table_prefix(FILE *outfp) { fprintf(outfp, "struct pmu_events_map pmu_events_map[] = {\n"); } static void print_mapping_table_suffix(FILE *outfp) { /* * Print the terminating, NULL entry. */ fprintf(outfp, "{\n"); fprintf(outfp, "\t.cpuid = 0,\n"); fprintf(outfp, "\t.version = 0,\n"); fprintf(outfp, "\t.type = 0,\n"); fprintf(outfp, "\t.table = 0,\n"); fprintf(outfp, "},\n"); /* and finally, the closing curly bracket for the struct */ fprintf(outfp, "};\n"); } static int process_mapfile(FILE *outfp, char *fpath) { int n = 16384; FILE *mapfp; char *save = NULL; char *line, *p; int line_num; char *tblname; int ret = 0; pr_info("%s: Processing mapfile %s\n", prog, fpath); line = malloc(n); if (!line) return -1; mapfp = fopen(fpath, "r"); if (!mapfp) { pr_info("%s: Error %s opening %s\n", prog, strerror(errno), fpath); free(line); return -1; } print_mapping_table_prefix(outfp); /* Skip first line (header) */ p = fgets(line, n, mapfp); if (!p) goto out; line_num = 1; while (1) { char *cpuid, *version, *type, *fname; line_num++; p = fgets(line, n, mapfp); if (!p) break; if (line[0] == '#' || line[0] == '\n') continue; if (line[strlen(line)-1] != '\n') { /* TODO Deal with lines longer than 16K */ pr_info("%s: Mapfile %s: line %d too long, aborting\n", prog, fpath, line_num); ret = -1; goto out; } line[strlen(line)-1] = '\0'; cpuid = fixregex(strtok_r(p, ",", &save)); version = strtok_r(NULL, ",", &save); fname = strtok_r(NULL, ",", &save); type = strtok_r(NULL, ",", &save); tblname = file_name_to_table_name(fname); fprintf(outfp, "{\n"); fprintf(outfp, "\t.cpuid = \"%s\",\n", cpuid); fprintf(outfp, "\t.version = \"%s\",\n", version); fprintf(outfp, "\t.type = \"%s\",\n", type); /* * CHECK: We can't use the type (eg "core") field in the * table name. For us to do that, we need to somehow tweak * the other caller of file_name_to_table(), process_json() * to determine the type. process_json() file has no way * of knowing these are "core" events unless file name has * core in it. If filename has core in it, we can safely * ignore the type field here also. */ fprintf(outfp, "\t.table = %s\n", tblname); fprintf(outfp, "},\n"); } out: print_mapping_table_suffix(outfp); fclose(mapfp); free(line); return ret; } /* * If we fail to locate/process JSON and map files, create a NULL mapping * table. This would at least allow perf to build even if we can't find/use * the aliases. */ static void create_empty_mapping(const char *output_file) { FILE *outfp; pr_info("%s: Creating empty pmu_events_map[] table\n", prog); /* Truncate file to clear any partial writes to it */ outfp = fopen(output_file, "w"); if (!outfp) { perror("fopen()"); _Exit(1); } fprintf(outfp, "#include \"pmu-events/pmu-events.h\"\n"); print_mapping_table_prefix(outfp); print_mapping_table_suffix(outfp); fclose(outfp); } static int get_maxfds(void) { struct rlimit rlim; if (getrlimit(RLIMIT_NOFILE, &rlim) == 0) return min(rlim.rlim_max / 2, (rlim_t)512); return 512; } /* * nftw() doesn't let us pass an argument to the processing function, * so use a global variables. */ static FILE *eventsfp; static char *mapfile; static int is_leaf_dir(const char *fpath) { DIR *d; struct dirent *dir; int res = 1; d = opendir(fpath); if (!d) return 0; while ((dir = readdir(d)) != NULL) { if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, "..")) continue; if (dir->d_type == DT_DIR) { res = 0; break; } else if (dir->d_type == DT_UNKNOWN) { char path[PATH_MAX]; struct stat st; sprintf(path, "%s/%s", fpath, dir->d_name); if (stat(path, &st)) break; if (S_ISDIR(st.st_mode)) { res = 0; break; } } } closedir(d); return res; } static int is_json_file(const char *name) { const char *suffix; if (strlen(name) < 5) return 0; suffix = name + strlen(name) - 5; if (strncmp(suffix, ".json", 5) == 0) return 1; return 0; } static int preprocess_arch_std_files(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf) { int level = ftwbuf->level; int is_file = typeflag == FTW_F; if (level == 1 && is_file && is_json_file(fpath)) return json_events(fpath, save_arch_std_events, (void *)sb); return 0; } static int process_one_file(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf) { char *tblname, *bname; int is_dir = typeflag == FTW_D; int is_file = typeflag == FTW_F; int level = ftwbuf->level; int err = 0; if (level == 2 && is_dir) { /* * For level 2 directory, bname will include parent name, * like vendor/platform. So search back from platform dir * to find this. */ bname = (char *) fpath + ftwbuf->base - 2; for (;;) { if (*bname == '/') break; bname--; } bname++; } else bname = (char *) fpath + ftwbuf->base; pr_debug("%s %d %7jd %-20s %s\n", is_file ? "f" : is_dir ? "d" : "x", level, sb->st_size, bname, fpath); /* base dir or too deep */ if (level == 0 || level > 3) return 0; /* model directory, reset topic */ if ((level == 1 && is_dir && is_leaf_dir(fpath)) || (level == 2 && is_dir)) { if (close_table) print_events_table_suffix(eventsfp); /* * Drop file name suffix. Replace hyphens with underscores. * Fail if file name contains any alphanum characters besides * underscores. */ tblname = file_name_to_table_name(bname); if (!tblname) { pr_info("%s: Error determining table name for %s\n", prog, bname); return -1; } print_events_table_prefix(eventsfp, tblname); return 0; } /* * Save the mapfile name for now. We will process mapfile * after processing all JSON files (so we can write out the * mapping table after all PMU events tables). * */ if (level == 1 && is_file) { if (!strcmp(bname, "mapfile.csv")) { mapfile = strdup(fpath); return 0; } pr_info("%s: Ignoring file %s\n", prog, fpath); return 0; } /* * If the file name does not have a .json extension, * ignore it. It could be a readme.txt for instance. */ if (is_file) { if (!is_json_file(bname)) { pr_info("%s: Ignoring file without .json suffix %s\n", prog, fpath); return 0; } } if (level > 1 && add_topic(bname)) return -ENOMEM; /* * Assume all other files are JSON files. * * If mapfile refers to 'power7_core.json', we create a table * named 'power7_core'. Any inconsistencies between the mapfile * and directory tree could result in build failure due to table * names not being found. * * Atleast for now, be strict with processing JSON file names. * i.e. if JSON file name cannot be mapped to C-style table name, * fail. */ if (is_file) { struct perf_entry_data data = { .topic = get_topic(), .outfp = eventsfp, }; err = json_events(fpath, print_events_table_entry, &data); free(data.topic); } return err; } #ifndef PATH_MAX #define PATH_MAX 4096 #endif /* * Starting in directory 'start_dirname', find the "mapfile.csv" and * the set of JSON files for the architecture 'arch'. * * From each JSON file, create a C-style "PMU events table" from the * JSON file (see struct pmu_event). * * From the mapfile, create a mapping between the CPU revisions and * PMU event tables (see struct pmu_events_map). * * Write out the PMU events tables and the mapping table to pmu-event.c. */ int main(int argc, char *argv[]) { int rc, ret = 0; int maxfds; char ldirname[PATH_MAX]; const char *arch; const char *output_file; const char *start_dirname; struct stat stbuf; prog = basename(argv[0]); if (argc < 4) { pr_err("Usage: %s \n", prog); return 1; } arch = argv[1]; start_dirname = argv[2]; output_file = argv[3]; if (argc > 4) verbose = atoi(argv[4]); eventsfp = fopen(output_file, "w"); if (!eventsfp) { pr_err("%s Unable to create required file %s (%s)\n", prog, output_file, strerror(errno)); return 2; } sprintf(ldirname, "%s/%s", start_dirname, arch); /* If architecture does not have any event lists, bail out */ if (stat(ldirname, &stbuf) < 0) { pr_info("%s: Arch %s has no PMU event lists\n", prog, arch); goto empty_map; } /* Include pmu-events.h first */ fprintf(eventsfp, "#include \"pmu-events/pmu-events.h\"\n"); /* * The mapfile allows multiple CPUids to point to the same JSON file, * so, not sure if there is a need for symlinks within the pmu-events * directory. * * For now, treat symlinks of JSON files as regular files and create * separate tables for each symlink (presumably, each symlink refers * to specific version of the CPU). */ maxfds = get_maxfds(); mapfile = NULL; rc = nftw(ldirname, preprocess_arch_std_files, maxfds, 0); if (rc && verbose) { pr_info("%s: Error preprocessing arch standard files %s\n", prog, ldirname); goto empty_map; } else if (rc < 0) { /* Make build fail */ fclose(eventsfp); free_arch_std_events(); return 1; } else if (rc) { goto empty_map; } rc = nftw(ldirname, process_one_file, maxfds, 0); if (rc && verbose) { pr_info("%s: Error walking file tree %s\n", prog, ldirname); goto empty_map; } else if (rc < 0) { /* Make build fail */ fclose(eventsfp); free_arch_std_events(); ret = 1; goto out_free_mapfile; } else if (rc) { goto empty_map; } if (close_table) print_events_table_suffix(eventsfp); if (!mapfile) { pr_info("%s: No CPU->JSON mapping?\n", prog); goto empty_map; } if (process_mapfile(eventsfp, mapfile)) { pr_info("%s: Error processing mapfile %s\n", prog, mapfile); /* Make build fail */ fclose(eventsfp); free_arch_std_events(); ret = 1; } goto out_free_mapfile; empty_map: fclose(eventsfp); create_empty_mapping(output_file); free_arch_std_events(); out_free_mapfile: free(mapfile); return ret; }