9132d3d92d
When we have multiple groups in an evlist, say: $ perf stat -e '{cycles,instructions},{cache-references,cache-misses}' sleep 1 Performance counter stats for 'sleep 1': 343,134 cycles:u 249,292 instructions:u # 0.73 insn per cycle 15,556 cache-references:u 8,925 cache-misses:u # 57.373 % of all cache refs 1.000957550 seconds time elapsed $ Then the perf_evsel instances for the two group leaders ("cycles" and "cache-references") will have evsel->nr_members set to 2, while all the evsel->evlist->nr_entries will be set to 4, so we can't use evsel->evlist->nr_entries everywhere, as event groups need to be taken into account. But this probably requires us to audit at least the forced-group code, where we want all of the events to be in a "group", to see them all in the screen, one column for each, even knowing that they were not necessarily scheduled to count at the same time by the kernel perf subsystem. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-2g0vwqnc49wl4ttjk8dvpgcc@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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.. | ||
arch | ||
bench | ||
Documentation | ||
examples/bpf | ||
include/bpf | ||
jvmti | ||
pmu-events | ||
python | ||
scripts | ||
tests | ||
trace | ||
ui | ||
util | ||
.gitignore | ||
Build | ||
builtin-annotate.c | ||
builtin-bench.c | ||
builtin-buildid-cache.c | ||
builtin-buildid-list.c | ||
builtin-c2c.c | ||
builtin-config.c | ||
builtin-data.c | ||
builtin-diff.c | ||
builtin-evlist.c | ||
builtin-ftrace.c | ||
builtin-help.c | ||
builtin-inject.c | ||
builtin-kallsyms.c | ||
builtin-kmem.c | ||
builtin-kvm.c | ||
builtin-list.c | ||
builtin-lock.c | ||
builtin-mem.c | ||
builtin-probe.c | ||
builtin-record.c | ||
builtin-report.c | ||
builtin-sched.c | ||
builtin-script.c | ||
builtin-stat.c | ||
builtin-timechart.c | ||
builtin-top.c | ||
builtin-trace.c | ||
builtin-version.c | ||
builtin.h | ||
check-headers.sh | ||
command-list.txt | ||
CREDITS | ||
design.txt | ||
Makefile | ||
Makefile.config | ||
Makefile.perf | ||
MANIFEST | ||
perf-archive.sh | ||
perf-completion.sh | ||
perf-read-vdso.c | ||
perf-sys.h | ||
perf-with-kcore.sh | ||
perf.c | ||
perf.h |