From: Andres Freund andres@anarazel.de
commit c1c8013ec34d7163431d18367808ea40b2e305f8 upstream.
Commit 722ddfde366f ("perf tools: Fix time sorting") changed - correctly so - hist_entry__sort to return int64. Unfortunately several of the builtin-c2c.c comparison routines only happened to work due the cast caused by the wrong return type.
This causes meaningless ordering of both the cacheline list, and the cacheline details page. E.g a simple:
perf c2c record -a sleep 3 perf c2c report
will result in cacheline table like ================================================= Shared Data Cache Line Table ================================================= # # ------- Cacheline ---------- Total Tot - LLC Load Hitm - - Store Reference - - Load Dram - LLC Total - Core Load Hit - - LLC Load Hit - # Index Address Node PA cnt records Hitm Total Lcl Rmt Total L1Hit L1Miss Lcl Rmt Ld Miss Loads FB L1 L2 Llc Rmt # ..... .............. .... ...... ....... ...... ..... ..... ... .... ..... ...... ...... .... ...... ..... ..... ..... ... .... .......
0 0x7f0d27ffba00 N/A 0 52 0.12% 13 6 7 12 12 0 0 7 14 40 4 16 0 0 0 1 0x7f0d27ff61c0 N/A 0 6353 14.04% 1475 801 674 779 779 0 0 718 1392 5574 1299 1967 0 115 0 2 0x7f0d26d3ec80 N/A 0 71 0.15% 16 4 12 13 13 0 0 12 24 58 1 20 0 9 0 3 0x7f0d26d3ec00 N/A 0 98 0.22% 23 17 6 19 19 0 0 6 12 79 0 40 0 10 0
i.e. with the list not being ordered by Total Hitm.
Fixes: 722ddfde366f ("perf tools: Fix time sorting") Signed-off-by: Andres Freund andres@anarazel.de Tested-by: Michael Petlan mpetlan@redhat.com Acked-by: Jiri Olsa jolsa@redhat.com Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Andi Kleen ak@linux.intel.com Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Cc: stable@vger.kernel.org # v3.16+ Link: http://lore.kernel.org/lkml/20200109043030.233746-1-andres@anarazel.de Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- tools/perf/builtin-c2c.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
--- a/tools/perf/builtin-c2c.c +++ b/tools/perf/builtin-c2c.c @@ -595,8 +595,8 @@ tot_hitm_cmp(struct perf_hpp_fmt *fmt __ { struct c2c_hist_entry *c2c_left; struct c2c_hist_entry *c2c_right; - unsigned int tot_hitm_left; - unsigned int tot_hitm_right; + uint64_t tot_hitm_left; + uint64_t tot_hitm_right;
c2c_left = container_of(left, struct c2c_hist_entry, he); c2c_right = container_of(right, struct c2c_hist_entry, he); @@ -629,7 +629,8 @@ __f ## _cmp(struct perf_hpp_fmt *fmt __m \ c2c_left = container_of(left, struct c2c_hist_entry, he); \ c2c_right = container_of(right, struct c2c_hist_entry, he); \ - return c2c_left->stats.__f - c2c_right->stats.__f; \ + return (uint64_t) c2c_left->stats.__f - \ + (uint64_t) c2c_right->stats.__f; \ }
#define STAT_FN(__f) \ @@ -682,7 +683,8 @@ ld_llcmiss_cmp(struct perf_hpp_fmt *fmt c2c_left = container_of(left, struct c2c_hist_entry, he); c2c_right = container_of(right, struct c2c_hist_entry, he);
- return llc_miss(&c2c_left->stats) - llc_miss(&c2c_right->stats); + return (uint64_t) llc_miss(&c2c_left->stats) - + (uint64_t) llc_miss(&c2c_right->stats); }
static uint64_t total_records(struct c2c_stats *stats)