Messages in this thread Patch in this message |  | | From | kan.liang@linux ... | Subject | [PATCH 43/49] perf stat: Add default hybrid events | Date | Mon, 8 Feb 2021 07:25:40 -0800 |
| |
From: Jin Yao <yao.jin@linux.intel.com>
Previously if '-e' is not specified in perf stat, some software events and hardware events are added to evlist by default.
root@otcpl-adl-s-2:~# ./perf stat -- ./triad_loop
Performance counter stats for './triad_loop':
109.43 msec task-clock # 0.993 CPUs utilized 1 context-switches # 0.009 K/sec 0 cpu-migrations # 0.000 K/sec 105 page-faults # 0.960 K/sec 401,161,982 cycles # 3.666 GHz 1,601,216,357 instructions # 3.99 insn per cycle 200,217,751 branches # 1829.686 M/sec 14,555 branch-misses # 0.01% of all branches
0.110176860 seconds time elapsed
Among the events, cycles, instructions, branches and branch-misses are hardware events.
One hybrid platform, two events are created for one hardware event.
core cycles, atom cycles, core instructions, atom instructions, core branches, atom branches, core branch-misses, atom branch-misses
These events will be added to evlist in order on hybrid platform if '-e' is not set.
Since parse_events() has been supported to create two hardware events for one event on hybrid platform, so we just use parse_events(evlist, "cycles,instructions,branches,branch-misses") to create the default events and add them to evlist.
After: root@otcpl-adl-s-2:~# ./perf stat -vv -- taskset -c 16 ./triad_loop ... ------------------------------------------------------------ perf_event_attr: type 1 size 120 config 0x1 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 27954 cpu -1 group_fd -1 flags 0x8 = 3 ------------------------------------------------------------ perf_event_attr: type 1 size 120 config 0x3 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 27954 cpu -1 group_fd -1 flags 0x8 = 4 ------------------------------------------------------------ perf_event_attr: type 1 size 120 config 0x4 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 27954 cpu -1 group_fd -1 flags 0x8 = 5 ------------------------------------------------------------ perf_event_attr: type 1 size 120 config 0x2 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 27954 cpu -1 group_fd -1 flags 0x8 = 7 ------------------------------------------------------------ perf_event_attr: type 6 size 120 config 0x400000000 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 27954 cpu -1 group_fd -1 flags 0x8 = 8 ------------------------------------------------------------ perf_event_attr: type 6 size 120 config 0xa00000000 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 27954 cpu -1 group_fd -1 flags 0x8 = 9 ------------------------------------------------------------ perf_event_attr: type 6 size 120 config 0x400000001 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 27954 cpu -1 group_fd -1 flags 0x8 = 10 ------------------------------------------------------------ perf_event_attr: type 6 size 120 config 0xa00000001 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 27954 cpu -1 group_fd -1 flags 0x8 = 11 ------------------------------------------------------------ perf_event_attr: type 6 size 120 config 0x400000004 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 27954 cpu -1 group_fd -1 flags 0x8 = 12 ------------------------------------------------------------ perf_event_attr: type 6 size 120 config 0xa00000004 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 27954 cpu -1 group_fd -1 flags 0x8 = 13 ------------------------------------------------------------ perf_event_attr: type 6 size 120 config 0x400000005 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 27954 cpu -1 group_fd -1 flags 0x8 = 14 ------------------------------------------------------------ perf_event_attr: type 6 size 120 config 0xa00000005 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ ...
Performance counter stats for 'taskset -c 16 ./triad_loop':
201.31 msec task-clock # 0.997 CPUs utilized 1 context-switches # 0.005 K/sec 1 cpu-migrations # 0.005 K/sec 166 page-faults # 0.825 K/sec 623,267,134 cycles # 3096.043 M/sec (0.16%) 603,082,383 cycles # 2995.777 M/sec (99.84%) 406,410,481 instructions # 2018.820 M/sec (0.16%) 1,604,213,375 instructions # 7968.837 M/sec (99.84%) 81,444,171 branches # 404.569 M/sec (0.16%) 200,616,430 branches # 996.550 M/sec (99.84%) 3,769,856 branch-misses # 18.727 M/sec (0.16%) 16,111 branch-misses # 0.080 M/sec (99.84%)
0.201895853 seconds time elapsed
We can see two events are created for one hardware event. First one is core event the second one is atom event.
One thing is, the shadow stats looks a bit different, now it's just 'M/sec'.
The perf_stat__update_shadow_stats and perf_stat__print_shadow_stats need to be improved in future if we want to get the original shadow stats.
Reviewed-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Jin Yao <yao.jin@linux.intel.com> --- tools/perf/builtin-stat.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 44d1a5f..0b08665 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -1137,6 +1137,13 @@ static int parse_hybrid_type(const struct option *opt, return 0; } +static int add_default_hybrid_events(struct evlist *evlist) +{ + struct parse_events_error err; + + return parse_events(evlist, "cycles,instructions,branches,branch-misses", &err); +} + static struct option stat_options[] = { OPT_BOOLEAN('T', "transaction", &transaction_run, "hardware transaction statistics"), @@ -1613,6 +1620,12 @@ static int add_default_attributes(void) { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, }; + struct perf_event_attr default_sw_attrs[] = { + { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, + { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, + { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, + { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, +}; /* * Detailed stats (-d), covering the L1 and last level data caches: @@ -1849,6 +1862,15 @@ static int add_default_attributes(void) } if (!evsel_list->core.nr_entries) { + perf_pmu__scan(NULL); + if (perf_pmu__hybrid_exist()) { + if (evlist__add_default_attrs(evsel_list, + default_sw_attrs) < 0) { + return -1; + } + return add_default_hybrid_events(evsel_list); + } + if (target__has_cpu(&target)) default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK; -- 2.7.4
|  |