Adding --ldlat option to specify desired latency for loads event. Specify 50 as loads event latency:
$ perf mem record -e ldlat-loads -v --ldlat 50 true calling: record -W -d -e cpu/mem-loads,ldlat=50/P true Link: http://lkml.kernel.org/n/tip-ec2m0cvivkfs8uhtiv411...@git.kernel.org Signed-off-by: Jiri Olsa <jo...@kernel.org> --- tools/perf/Documentation/perf-mem.txt | 3 +++ tools/perf/builtin-mem.c | 1 + tools/perf/util/mem-events.c | 17 ++++++++++++++++- tools/perf/util/mem-events.h | 1 + 4 files changed, 21 insertions(+), 1 deletion(-) diff --git a/tools/perf/Documentation/perf-mem.txt b/tools/perf/Documentation/perf-mem.txt index 43310d8661fe..6676d2784733 100644 --- a/tools/perf/Documentation/perf-mem.txt +++ b/tools/perf/Documentation/perf-mem.txt @@ -48,6 +48,9 @@ OPTIONS option can be passed in record mode. It will be interpreted the same way as perf record. +--ldload:: + Specify desired latency for loads event. + SEE ALSO -------- linkperf:perf-record[1], linkperf:perf-report[1] diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c index 914f6fe192e3..bf0bfca5be20 100644 --- a/tools/perf/builtin-mem.c +++ b/tools/perf/builtin-mem.c @@ -66,6 +66,7 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem) OPT_CALLBACK('e', "event", &mem, "event", "event selector. use 'perf mem record -e list' to list available events", parse_record_events), + OPT_UINTEGER(0, "ldlat", &perf_mem_events__loads_ldlat, "mem-loads latency"), OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"), OPT_END() diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c index e6b01e6f70a0..3ff60f08a778 100644 --- a/tools/perf/util/mem-events.c +++ b/tools/perf/util/mem-events.c @@ -10,10 +10,12 @@ #include "debug.h" #include "symbol.h" +unsigned int perf_mem_events__loads_ldlat = 30; + #define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s } struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = { - E("ldlat-loads", "cpu/mem-loads,ldlat=30/P", "mem-loads"), + E("ldlat-loads", "cpu/mem-loads,ldlat=%u/P", "mem-loads"), E("ldlat-stores", "cpu/mem-stores/P", "mem-stores"), E("stlb-miss-loads", "cpu/mem-stlb-miss-loads/P", "mem-stlb-miss-loads"), E("stlb-miss-stores", "cpu/mem-stlb-miss-stores/P", "mem-stlb-miss-stores"), @@ -39,8 +41,21 @@ struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = { #undef E +static char mem_loads_name[100]; +static bool mem_loads_name__init; + char *perf_mem_events__name(int i) { + if (i == PERF_MEM_EVENTS__LOAD) { + if (!mem_loads_name__init) { + mem_loads_name__init = true; + scnprintf(mem_loads_name, sizeof(mem_loads_name), + perf_mem_events[i].name, + perf_mem_events__loads_ldlat); + } + return mem_loads_name; + } + return (char *)perf_mem_events[i].name; } diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h index de88f4267cd1..939786ffab2a 100644 --- a/tools/perf/util/mem-events.h +++ b/tools/perf/util/mem-events.h @@ -37,6 +37,7 @@ enum { }; extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX]; +extern unsigned int perf_mem_events__loads_ldlat; int perf_mem_events__parse(const char *str); int perf_mem_events__init(void); -- 2.4.3
