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authorAlexey Budankov <alexey.budankov@linux.intel.com>2018-06-04 09:50:56 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-06-06 12:52:04 -0300
commitf92da71280fb8da3a7c489e08a096f0b8715f939 (patch)
tree6aa3d3c659472d88ee121f11325671ffb6847ad4 /tools
parentaef4feace285f27c8ed35830a5d575bec7f3e90a (diff)
downloadlinux-f92da71280fb8da3a7c489e08a096f0b8715f939.tar.bz2
perf record: Enable arbitrary event names thru name= modifier
Enable complex event names containing [.:=,] symbols to be encoded into Perf trace using name= modifier e.g. like this: perf record -e cpu/name=\'OFFCORE_RESPONSE:request=DEMAND_RFO:response=L3_HIT.SNOOP_HITM\',\ period=0x3567e0,event=0x3c,cmask=0x1/Duk ./futex Below is how it looks like in the report output. Please note explicit escaped quoting at cmdline string in the header so that thestring can be directly reused for another collection in shell: perf report --header # ======== ... # cmdline : /root/abudanko/kernel/tip/tools/perf/perf record -v -e cpu/name=\'OFFCORE_RESPONSE:request=DEMAND_RFO:response=L3_HIT.SNOOP_HITM\',period=0x3567e0,event=0x3c,cmask=0x1/Duk ./futex # event : name = OFFCORE_RESPONSE:request=DEMAND_RFO:response=L3_HIT.SNOOP_HITM, , type = 4, size = 112, config = 0x100003c, { sample_period, sample_freq } = 3500000, sample_type = IP|TID|TIME, disabled = 1, inh ... # ======== # # # Total Lost Samples: 0 # # Samples: 24K of event 'OFFCORE_RESPONSE:request=DEMAND_RFO:response=L3_HIT.SNOOP_HITM' # Event count (approx.): 86492000000 # # Overhead Command Shared Object Symbol # ........ ....... ................ .............................................. # 14.75% futex [kernel.vmlinux] [k] __entry_trampoline_start ... perf stat -e cpu/name=\'CPU_CLK_UNHALTED.THREAD:cmask=0x1\',period=0x3567e0,event=0x3c,cmask=0x1/Duk ./futex 10000000 process context switches in 16678890291ns (1667.9ns/ctxsw) Performance counter stats for './futex': 88,095,770,571 CPU_CLK_UNHALTED.THREAD:cmask=0x1 16.679542407 seconds time elapsed Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com> Acked-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/c194b060-761d-0d50-3b21-bb4ed680002d@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Documentation/perf-list.txt6
-rw-r--r--tools/perf/Documentation/perf-record.txt3
-rw-r--r--tools/perf/util/header.c20
-rw-r--r--tools/perf/util/parse-events.l18
4 files changed, 43 insertions, 4 deletions
diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index 2549c34a7895..11300dbe35c5 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -124,7 +124,11 @@ The available PMUs and their raw parameters can be listed with
For example the raw event "LSD.UOPS" core pmu event above could
be specified as
- perf stat -e cpu/event=0xa8,umask=0x1,name=LSD.UOPS_CYCLES,cmask=1/ ...
+ perf stat -e cpu/event=0xa8,umask=0x1,name=LSD.UOPS_CYCLES,cmask=0x1/ ...
+
+ or using extended name syntax
+
+ perf stat -e cpu/event=0xa8,umask=0x1,cmask=0x1,name=\'LSD.UOPS_CYCLES:cmask=0x1\'/ ...
PER SOCKET PMUS
---------------
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index cc37b3a4be76..04168da4268e 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -57,6 +57,9 @@ OPTIONS
FP mode, "dwarf" for DWARF mode, "lbr" for LBR mode and
"no" for disable callgraph.
- 'stack-size': user stack size for dwarf mode
+ - 'name' : User defined event name. Single quotes (') may be used to
+ escape symbols in the name from parsing by shell and tool
+ like this: name=\'CPU_CLK_UNHALTED.THREAD:cmask=0x1\'.
See the linkperf:perf-list[1] man page for more parameters.
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 2625cc38a0d6..540cd2dcd3e7 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1459,8 +1459,24 @@ static void print_cmdline(struct feat_fd *ff, FILE *fp)
fprintf(fp, "# cmdline : ");
- for (i = 0; i < nr; i++)
- fprintf(fp, "%s ", ff->ph->env.cmdline_argv[i]);
+ for (i = 0; i < nr; i++) {
+ char *argv_i = strdup(ff->ph->env.cmdline_argv[i]);
+ if (!argv_i) {
+ fprintf(fp, "%s ", ff->ph->env.cmdline_argv[i]);
+ } else {
+ char *mem = argv_i;
+ do {
+ char *quote = strchr(argv_i, '\'');
+ if (!quote)
+ break;
+ *quote++ = '\0';
+ fprintf(fp, "%s\\\'", argv_i);
+ argv_i = quote;
+ } while (1);
+ fprintf(fp, "%s ", argv_i);
+ free(mem);
+ }
+ }
fputc('\n', fp);
}
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index a1a01b1ac8b8..5f761f3ed0f3 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -53,7 +53,21 @@ static int str(yyscan_t scanner, int token)
YYSTYPE *yylval = parse_events_get_lval(scanner);
char *text = parse_events_get_text(scanner);
- yylval->str = strdup(text);
+ if (text[0] != '\'') {
+ yylval->str = strdup(text);
+ } else {
+ /*
+ * If a text tag specified on the command line
+ * contains opening single quite ' then it is
+ * expected that the tag ends with single quote
+ * as well, like this:
+ * name=\'CPU_CLK_UNHALTED.THREAD:cmask=1\'
+ * quotes need to be escaped to bypass shell
+ * processing.
+ */
+ yylval->str = strndup(&text[1], strlen(text) - 2);
+ }
+
return token;
}
@@ -176,6 +190,7 @@ num_dec [0-9]+
num_hex 0x[a-fA-F0-9]+
num_raw_hex [a-fA-F0-9]+
name [a-zA-Z_*?\[\]][a-zA-Z0-9_*?.\[\]]*
+name_tag [\'][a-zA-Z_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\']
name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*
drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)?
/* If you add a modifier you need to update check_modifier() */
@@ -344,6 +359,7 @@ r{num_raw_hex} { return raw(yyscanner); }
{bpf_object} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_OBJECT); }
{bpf_source} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_SOURCE); }
{name} { return pmu_str_check(yyscanner); }
+{name_tag} { return str(yyscanner, PE_NAME); }
"/" { BEGIN(config); return '/'; }
- { return '-'; }
, { BEGIN(event); return ','; }