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| author | Jiri Olsa <jolsa@kernel.org> | 2017-08-24 10:57:32 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-08-28 11:05:10 -0300 |
| commit | 12c15302dd4b768105d4b7a487ed4858ccab94fc (patch) | |
| tree | cfcfa68d9610d7c152d847c10e7e958e3f8c3822 /tools/perf/util/mem-events.c | |
| parent | 6bd76b8fabe157233e498931c3f9298ee7128a28 (diff) | |
| download | talos-obmc-linux-12c15302dd4b768105d4b7a487ed4858ccab94fc.tar.gz talos-obmc-linux-12c15302dd4b768105d4b7a487ed4858ccab94fc.zip | |
perf c2c: Fix remote HITM detection for Skylake
Skylake introduced new mem_remote bit in union perf_mem_data_src [1].
It applies to any other memory level to express Remote unknown level, as
is reported by Skylake.
Adding this extra check to c2c_decode_stats to properly decode remote
HITMs on Skylake.
[1] http://lkml.kernel.org/r/20170816222156.19953-4-andi@firstfloor.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20170824085732.28481-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/mem-events.c')
| -rw-r--r-- | tools/perf/util/mem-events.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c index ced4f3fff035..28afe5fa84d6 100644 --- a/tools/perf/util/mem-events.c +++ b/tools/perf/util/mem-events.c @@ -316,6 +316,11 @@ int c2c_decode_stats(struct c2c_stats *stats, struct mem_info *mi) u64 lvl = data_src->mem_lvl; u64 snoop = data_src->mem_snoop; u64 lock = data_src->mem_lock; + /* + * Skylake might report unknown remote level via this + * bit, consider it when evaluating remote HITMs. + */ + bool mrem = data_src->mem_remote; int err = 0; #define HITM_INC(__f) \ @@ -361,7 +366,8 @@ do { \ } if ((lvl & P(LVL, REM_RAM1)) || - (lvl & P(LVL, REM_RAM2))) { + (lvl & P(LVL, REM_RAM2)) || + mrem) { stats->rmt_dram++; if (snoop & P(SNOOP, HIT)) stats->ld_shared++; @@ -371,7 +377,8 @@ do { \ } if ((lvl & P(LVL, REM_CCE1)) || - (lvl & P(LVL, REM_CCE2))) { + (lvl & P(LVL, REM_CCE2)) || + mrem) { if (snoop & P(SNOOP, HIT)) stats->rmt_hit++; else if (snoop & P(SNOOP, HITM)) |
