Commit-ID: ce1e22b08f0728e840614d3d0fc43fd1d6b7f7a2 Gitweb: http://git.kernel.org/tip/ce1e22b08f0728e840614d3d0fc43fd1d6b7f7a2 Author: Jiri Olsa <jo...@kernel.org> AuthorDate: Mon, 15 Feb 2016 09:34:35 +0100 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Tue, 23 Feb 2016 12:15:59 -0300
perf mem: Add -e record option Adding -e option for perf mem record command, to be able to specify memory event directly. Get list of available events: $ perf mem record -e list ldlat-loads ldlat-stores Monitor ldlat-loads: $ perf mem record -e ldlat-loads true Committer notes: Further testing: # perf mem record -e ldlat-loads true [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.020 MB perf.data (10 samples) ] # perf evlist cpu/mem-loads,ldlat=30/P # Signed-off-by: Jiri Olsa <jo...@kernel.org> Tested-by: Arnaldo Carvalho de Melo <a...@redhat.com> Cc: Andi Kleen <a...@linux.intel.com> Cc: David Ahern <dsah...@gmail.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Stephane Eranian <eran...@google.com> Link: http://lkml.kernel.org/r/1455525293-8671-6-git-send-email-jo...@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/builtin-mem.c | 63 +++++++++++++++++++++++++++++++++++++++++--- tools/perf/util/mem-events.c | 47 ++++++++++++++++++++++++++++++--- tools/perf/util/mem-events.h | 3 +++ 3 files changed, 106 insertions(+), 7 deletions(-) diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c index 36c56a4..b3f8a89 100644 --- a/tools/perf/builtin-mem.c +++ b/tools/perf/builtin-mem.c @@ -7,6 +7,7 @@ #include "util/session.h" #include "util/data.h" #include "util/mem-events.h" +#include "util/debug.h" #define MEM_OPERATION_LOAD 0x1 #define MEM_OPERATION_STORE 0x2 @@ -22,11 +23,55 @@ struct perf_mem { DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS); }; +static int parse_record_events(const struct option *opt, + const char *str, int unset __maybe_unused) +{ + struct perf_mem *mem = *(struct perf_mem **)opt->value; + int j; + + if (strcmp(str, "list")) { + if (!perf_mem_events__parse(str)) { + mem->operation = 0; + return 0; + } + exit(-1); + } + + for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { + struct perf_mem_event *e = &perf_mem_events[j]; + + fprintf(stderr, "%-20s%s", + e->tag, verbose ? "" : "\n"); + if (verbose) + fprintf(stderr, " [%s]\n", e->name); + } + exit(0); +} + +static const char * const __usage[] = { + "perf mem record [<options>] [<command>]", + "perf mem record [<options>] -- <command> [<options>]", + NULL +}; + +static const char * const *record_mem_usage = __usage; + static int __cmd_record(int argc, const char **argv, struct perf_mem *mem) { int rec_argc, i = 0, j; const char **rec_argv; int ret; + struct option options[] = { + OPT_CALLBACK('e', "event", &mem, "event", + "event selector. use 'perf mem record -e list' to list available events", + parse_record_events), + OPT_INCR('v', "verbose", &verbose, + "be more verbose (show counter open errors, etc)"), + OPT_END() + }; + + argc = parse_options(argc, argv, options, record_mem_usage, + PARSE_OPT_STOP_AT_NON_OPTION); rec_argc = argc + 7; /* max number of arguments */ rec_argv = calloc(rec_argc + 1, sizeof(char *)); @@ -35,10 +80,11 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem) rec_argv[i++] = "record"; - if (mem->operation & MEM_OPERATION_LOAD) { + if (mem->operation & MEM_OPERATION_LOAD) perf_mem_events[PERF_MEM_EVENTS__LOAD].record = true; + + if (perf_mem_events[PERF_MEM_EVENTS__LOAD].record) rec_argv[i++] = "-W"; - } rec_argv[i++] = "-d"; @@ -50,9 +96,19 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem) rec_argv[i++] = perf_mem_events[j].name; }; - for (j = 1; j < argc; j++, i++) + for (j = 0; j < argc; j++, i++) rec_argv[i] = argv[j]; + if (verbose > 0) { + pr_debug("calling: record "); + + while (rec_argv[j]) { + pr_debug("%s ", rec_argv[j]); + j++; + } + pr_debug("\n"); + } + ret = cmd_record(i, rec_argv, NULL); free(rec_argv); return ret; @@ -299,7 +355,6 @@ int cmd_mem(int argc, const char **argv, const char *prefix __maybe_unused) NULL }; - argc = parse_options_subcommand(argc, argv, mem_options, mem_subcommands, mem_usage, PARSE_OPT_STOP_AT_NON_OPTION); diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c index c6ba0a1..b1507c0 100644 --- a/tools/perf/util/mem-events.c +++ b/tools/perf/util/mem-events.c @@ -1,10 +1,51 @@ +#include <stddef.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> #include "mem-events.h" +#include "debug.h" -#define E(n) { .name = n } +#define E(t, n) { .tag = t, .name = n } struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = { - E("cpu/mem-loads,ldlat=30/P"), - E("cpu/mem-stores/P"), + E("ldlat-loads", "cpu/mem-loads,ldlat=30/P"), + E("ldlat-stores", "cpu/mem-stores/P"), }; #undef E + +int perf_mem_events__parse(const char *str) +{ + char *tok, *saveptr = NULL; + bool found = false; + char *buf; + int j; + + /* We need buffer that we know we can write to. */ + buf = malloc(strlen(str) + 1); + if (!buf) + return -ENOMEM; + + strcpy(buf, str); + + tok = strtok_r((char *)buf, ",", &saveptr); + + while (tok) { + for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { + struct perf_mem_event *e = &perf_mem_events[j]; + + if (strstr(e->tag, tok)) + e->record = found = true; + } + + tok = strtok_r(NULL, ",", &saveptr); + } + + free(buf); + + if (found) + return 0; + + pr_err("failed: event '%s' not found, use '-e list' to get list of available events\n", str); + return -1; +} diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h index c97b214..2995bae 100644 --- a/tools/perf/util/mem-events.h +++ b/tools/perf/util/mem-events.h @@ -5,6 +5,7 @@ struct perf_mem_event { bool record; + const char *tag; const char *name; }; @@ -16,4 +17,6 @@ enum { extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX]; +int perf_mem_events__parse(const char *str); + #endif /* __PERF_MEM_EVENTS_H */
