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SubjectRe: [PATCH v5 5/5] perf mem: Support mem_lvl_num in c2c command
On Mon, Apr 11, 2022 at 11:04:28AM +0100, German Gomez wrote:
>
> On 08/04/2022 20:53, Ali Saidi wrote:
> > In addition to summarizing data encoded in mem_lvl also support data
> > encoded in mem_lvl_num.
> >
> > Since other architectures don't seem to populate the mem_lvl_num field
> > here there shouldn't be a change in functionality.
> >
> > Signed-off-by: Ali Saidi <alisaidi@amazon.com>
> > ---
> > tools/perf/util/mem-events.c | 11 +++++++----
> > 1 file changed, 7 insertions(+), 4 deletions(-)
> >
> > diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
> > index ed0ab838bcc5..e5e405185498 100644
> > --- a/tools/perf/util/mem-events.c
> > +++ b/tools/perf/util/mem-events.c
> > @@ -485,6 +485,7 @@ int c2c_decode_stats(struct c2c_stats *stats, struct mem_info *mi)
> > u64 daddr = mi->daddr.addr;
> > u64 op = data_src->mem_op;
> > u64 lvl = data_src->mem_lvl;
> > + u64 lnum = data_src->mem_lvl_num;
> > u64 snoop = data_src->mem_snoop;
> > u64 lock = data_src->mem_lock;
> > u64 blk = data_src->mem_blk;
> > @@ -527,16 +528,18 @@ do { \
> > if (lvl & P(LVL, UNC)) stats->ld_uncache++;
> > if (lvl & P(LVL, IO)) stats->ld_io++;
> > if (lvl & P(LVL, LFB)) stats->ld_fbhit++;
>
> Just for completion, can we also handle LFB as it seems to be being set
> in "/arch/x86/events/intel/ds.c"? (Sorry I missed this in the v4)

With fixing LFB issue pointed by German, the change looks good to me:

Reviewed-by: Leo Yan <leo.yan@linaro.org>

It would be appreciate if x86 or PowerPC maintainers could take a look
for this patch. Thanks!

Leo

> > - if (lvl & P(LVL, L1 )) stats->ld_l1hit++;
> > - if (lvl & P(LVL, L2 )) stats->ld_l2hit++;
> > - if (lvl & P(LVL, L3 )) {
> > + if (lvl & P(LVL, L1) || lnum == P(LVLNUM, L1))
> > + stats->ld_l1hit++;
> > + if (lvl & P(LVL, L2) || lnum == P(LVLNUM, L2))
> > + stats->ld_l2hit++;
> > + if (lvl & P(LVL, L3) || lnum == P(LVLNUM, L3)) {
> > if (snoop & P(SNOOP, HITM))
> > HITM_INC(lcl_hitm);
> > else
> > stats->ld_llchit++;
> > }
> >
> > - if (lvl & P(LVL, LOC_RAM)) {
> > + if (lvl & P(LVL, LOC_RAM) || lnum == P(LVLNUM, RAM)) {
> > stats->lcl_dram++;
> > if (snoop & P(SNOOP, HIT))
> > stats->ld_shared++;

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