lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Sat, 17 Oct 2015 18:56:44 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Kan Liang <kan.liang@...el.com>, Jiri Olsa <jolsa@...nel.org>, Stephane Eranian <eranian@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, Andi Kleen <ak@...ux.intel.com>, David Ahern <dsahern@...il.com>, Namhyung Kim <namhyung@...nel.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Arnaldo Carvalho de Melo <acme@...hat.com> Subject: [PATCH 4.1 021/202] perf stat: Get correct cpu id for print_aggr 4.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Kan Liang <kan.liang@...el.com> commit 601083cffb7cabdcc55b8195d732f0f7028570fa upstream. print_aggr() fails to print per-core/per-socket statistics after commit 582ec0829b3d ("perf stat: Fix per-socket output bug for uncore events") if events have differnt cpus. Because in print_aggr(), aggr_get_id needs index (not cpu id) to find core/pkg id. Also, evsel cpu maps should be used to get aggregated id. Here is an example: Counting events cycles,uncore_imc_0/cas_count_read/. (Uncore event has cpumask 0,18) $ perf stat -e cycles,uncore_imc_0/cas_count_read/ -C0,18 --per-core sleep 2 Without this patch, it failes to get CPU 18 result. Performance counter stats for 'CPU(s) 0,18': S0-C0 1 7526851 cycles S0-C0 1 1.05 MiB uncore_imc_0/cas_count_read/ S1-C0 0 <not counted> cycles S1-C0 0 <not counted> MiB uncore_imc_0/cas_count_read/ With this patch, it can get both CPU0 and CPU18 result. Performance counter stats for 'CPU(s) 0,18': S0-C0 1 6327768 cycles S0-C0 1 0.47 MiB uncore_imc_0/cas_count_read/ S1-C0 1 330228 cycles S1-C0 1 0.29 MiB uncore_imc_0/cas_count_read/ Signed-off-by: Kan Liang <kan.liang@...el.com> Acked-by: Jiri Olsa <jolsa@...nel.org> Acked-by: Stephane Eranian <eranian@...gle.com> Cc: Adrian Hunter <adrian.hunter@...el.com> Cc: Andi Kleen <ak@...ux.intel.com> Cc: David Ahern <dsahern@...il.com> Cc: Namhyung Kim <namhyung@...nel.org> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl> Fixes: 582ec0829b3d ("perf stat: Fix per-socket output bug for uncore events") Link: http://lkml.kernel.org/r/1435820925-51091-1-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- tools/perf/builtin-stat.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -1227,7 +1227,7 @@ static void abs_printout(int id, int nr, static void print_aggr(char *prefix) { struct perf_evsel *counter; - int cpu, cpu2, s, s2, id, nr; + int cpu, s, s2, id, nr; double uval; u64 ena, run, val; @@ -1240,8 +1240,7 @@ static void print_aggr(char *prefix) val = ena = run = 0; nr = 0; for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) { - cpu2 = perf_evsel__cpus(counter)->map[cpu]; - s2 = aggr_get_id(evsel_list->cpus, cpu2); + s2 = aggr_get_id(perf_evsel__cpus(counter), cpu); if (s2 != id) continue; val += counter->counts->cpu[cpu].val; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists