Messages in this thread | | | Date | Mon, 23 May 2022 09:46:41 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH v3 04/11] perf mem: Add statistics for peer snooping |
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Em Mon, May 23, 2022 at 09:38:31AM -0300, Arnaldo Carvalho de Melo escreveu: > Em Wed, May 18, 2022 at 01:57:22PM +0800, Leo Yan escreveu: > > Since the flag PERF_MEM_SNOOPX_PEER is added to support cache snooping > > from peer cache line, it can come from a peer core, a peer cluster, or > > a remote NUMA node. > > > > This patch adds statistics for the flag PERF_MEM_SNOOPX_PEER. Note, we > > take PERF_MEM_SNOOPX_PEER as an affiliated info, it needs to cooperate > > with cache level statistics. Therefore, we account the load operations > > for both the cache level's metrics (e.g. ld_l2hit, ld_llchit, etc.) and > > the metric 'ld_peer' when flag PERF_MEM_SNOOPX_PEER is set. > > > > Signed-off-by: Leo Yan <leo.yan@linaro.org> > > Tested-by: Ali Saidi <alisaidi@amazon.com> > > util/mem-events.c: In function ‘c2c_decode_stats’: > util/mem-events.c:536:17: error: ‘PERF_MEM_SNOOPX_PEER’ undeclared (first use in this function); did you mean ‘PERF_MEM_SNOOPX_FWD’?
So I kept the first three patches:
⬢[acme@toolbox perf]$ git log --oneline -5 12aeaaba087d6d92 (HEAD -> perf/core) perf c2c: Update documentation for store metric 'N/A' 550b4d6f9a7e5ddc perf c2c: Add dimensions for 'N/A' metrics of store operation 9845063710725424 perf mem: Add stats for store operation with no available memory level 508c9fbce0d30da3 perf build: Error for BPF skeletons without LIBBPF 0869331fbaa2c11c Merge remote-tracking branch 'torvalds/master' into perf/core ⬢[acme@toolbox perf]$
With Jiri's ack, now waiting for clarification about the v9 discussion on the base patchkit.
- Arnaldo
> > Should I fix this as suggested by the compiler? > > 536 | #define P(a, b) PERF_MEM_##a##_##b > | ^~~~~~~~~ > util/mem-events.c:562:46: note: in expansion of macro ‘P’ > 562 | if (snoopx & P(SNOOPX, PEER)) > | ^ > util/mem-events.c:536:17: note: each undeclared identifier is reported only once for each function it appears in > 536 | #define P(a, b) PERF_MEM_##a##_##b > | ^~~~~~~~~ > util/mem-events.c:562:46: note: in expansion of macro ‘P’ > 562 | if (snoopx & P(SNOOPX, PEER)) > | ^ > make[4]: *** [/var/home/acme/git/perf/tools/build/Makefile.build:96: /tmp/build/perf/util/mem-events.o] Error 1 > make[4]: *** Waiting for unfinished jobs.... > LD /tmp/build/perf/util/scripting-engines/perf-in.o > make[3]: *** [/var/home/acme/git/perf/tools/build/Makefile.build:139: util] Error 2 > make[2]: *** [Makefile.perf:664: /tmp/build/perf/perf-in.o] Error 2 > make[1]: *** [Makefile.perf:240: sub-make] Error 2 > make: *** [Makefile:113: install-bin] Error 2 > make: Leaving directory '/var/home/acme/git/perf/tools/perf' > > Performance counter stats for 'make -k BUILD_BPF_SKEL=1 CORESIGHT=1 PYTHON=python3 O=/tmp/build/perf -C tools/perf install-bin': > > 31,749,639,340 cycles:u > 57,052,398,827 instructions:u # 1.80 insn per cycle > > 2.123830023 seconds time elapsed > > 7.146520000 seconds user > 1.707080000 seconds sys > > > ⬢[acme@toolbox perf]$ > > > --- > > tools/perf/util/mem-events.c | 22 +++++++++++++++++++--- > > tools/perf/util/mem-events.h | 1 + > > 2 files changed, 20 insertions(+), 3 deletions(-) > > > > diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c > > index 5dca1882c284..9de0eb3a1200 100644 > > --- a/tools/perf/util/mem-events.c > > +++ b/tools/perf/util/mem-events.c > > @@ -525,6 +525,7 @@ int c2c_decode_stats(struct c2c_stats *stats, struct mem_info *mi) > > u64 op = data_src->mem_op; > > u64 lvl = data_src->mem_lvl; > > u64 snoop = data_src->mem_snoop; > > + u64 snoopx = data_src->mem_snoopx; > > u64 lock = data_src->mem_lock; > > u64 blk = data_src->mem_blk; > > /* > > @@ -567,18 +568,28 @@ do { \ > > if (lvl & P(LVL, IO)) stats->ld_io++; > > if (lvl & P(LVL, LFB)) stats->ld_fbhit++; > > if (lvl & P(LVL, L1 )) stats->ld_l1hit++; > > - if (lvl & P(LVL, L2 )) stats->ld_l2hit++; > > + if (lvl & P(LVL, L2)) { > > + stats->ld_l2hit++; > > + > > + if (snoopx & P(SNOOPX, PEER)) > > + stats->ld_peer++; > > + } > > if (lvl & P(LVL, L3 )) { > > if (snoop & P(SNOOP, HITM)) > > HITM_INC(lcl_hitm); > > else > > stats->ld_llchit++; > > + > > + if (snoopx & P(SNOOPX, PEER)) > > + stats->ld_peer++; > > } > > > > if (lvl & P(LVL, LOC_RAM)) { > > stats->lcl_dram++; > > if (snoop & P(SNOOP, HIT)) > > stats->ld_shared++; > > + else if (snoopx & P(SNOOPX, PEER)) > > + stats->ld_peer++; > > else > > stats->ld_excl++; > > } > > @@ -597,10 +608,14 @@ do { \ > > if ((lvl & P(LVL, REM_CCE1)) || > > (lvl & P(LVL, REM_CCE2)) || > > mrem) { > > - if (snoop & P(SNOOP, HIT)) > > + if (snoop & P(SNOOP, HIT)) { > > stats->rmt_hit++; > > - else if (snoop & P(SNOOP, HITM)) > > + } else if (snoop & P(SNOOP, HITM)) { > > HITM_INC(rmt_hitm); > > + } else if (snoopx & P(SNOOPX, PEER)) { > > + stats->rmt_hit++; > > + stats->ld_peer++; > > + } > > } > > > > if ((lvl & P(LVL, MISS))) > > @@ -661,6 +676,7 @@ void c2c_add_stats(struct c2c_stats *stats, struct c2c_stats *add) > > stats->ld_l1hit += add->ld_l1hit; > > stats->ld_l2hit += add->ld_l2hit; > > stats->ld_llchit += add->ld_llchit; > > + stats->ld_peer += add->ld_peer; > > stats->lcl_hitm += add->lcl_hitm; > > stats->rmt_hitm += add->rmt_hitm; > > stats->tot_hitm += add->tot_hitm; > > diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h > > index 8a8b568baeee..4879b841c841 100644 > > --- a/tools/perf/util/mem-events.h > > +++ b/tools/perf/util/mem-events.h > > @@ -75,6 +75,7 @@ struct c2c_stats { > > u32 ld_l1hit; /* count of loads that hit L1D */ > > u32 ld_l2hit; /* count of loads that hit L2D */ > > u32 ld_llchit; /* count of loads that hit LLC */ > > + u32 ld_peer; /* count of loads that hit peer core or cluster cache */ > > u32 lcl_hitm; /* count of loads with local HITM */ > > u32 rmt_hitm; /* count of loads with remote HITM */ > > u32 tot_hitm; /* count of loads with local and remote HITM */ > > -- > > 2.25.1 > > -- > > - Arnaldo
--
- Arnaldo
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