linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Leo Yan <leo.yan@linaro.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	Andi Kleen <ak@linux.intel.com>, David Ahern <dsahern@gmail.com>,
	Don Zickus <dzickus@redhat.com>, Joe Mario <jmario@redhat.com>,
	Al Grant <Al.Grant@arm.com>, James Clark <james.clark@arm.com>,
	linux-kernel@vger.kernel.org
Cc: Leo Yan <leo.yan@linaro.org>
Subject: [PATCH v1 4/8] perf c2c: Change header from "LLC Load Hitm" to "Load Hitm"
Date: Wed, 14 Oct 2020 06:09:17 +0100	[thread overview]
Message-ID: <20201014050921.5591-5-leo.yan@linaro.org> (raw)
In-Reply-To: <20201014050921.5591-1-leo.yan@linaro.org>

The metrics "LLC Load Hitm" contains two items: one is "local Hitm" and
another is "remote Hitm".

"local Hitm" means: L3 HIT and was serviced by another processor core
with a cross core snoop where modified copies were found; it's no doubt
that "local Hitm" belongs to LLC access.

But for "remote Hitm", based on the code in util/mem-events, it's the
event for remote cache HIT and was serviced by another processor core
with modified copies.  Thus the remote Hitm is a remote cache's hit and
actually it's LLC load miss.

Now the display format gives users the impression that "local Hitm" and
"remote Hitm" both belong to the LLC load, but this is not the fact as
described.

This patch changes the header from "LLC Load Hitm" to "Load Hitm", this
can avoid the give the wrong impression that all Hitm belong to LLC.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
---
 tools/perf/builtin-c2c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 404d4739b8c1..fa7a1c55b989 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -1328,7 +1328,7 @@ static struct c2c_dimension dim_iaddr = {
 };
 
 static struct c2c_dimension dim_tot_hitm = {
-	.header		= HEADER_SPAN("----- LLC Load Hitm -----", "Total", 2),
+	.header		= HEADER_SPAN("------- Load Hitm -------", "Total", 2),
 	.name		= "tot_hitm",
 	.cmp		= tot_hitm_cmp,
 	.entry		= tot_hitm_entry,
-- 
2.17.1


  parent reply	other threads:[~2020-10-14  8:54 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-14  5:09 [PATCH v1 0/8] perf c2c: Refine the organization of metrics Leo Yan
2020-10-14  5:09 ` [PATCH v1 1/8] perf c2c: Display the total numbers continuously Leo Yan
2020-10-14  5:09 ` [PATCH v1 2/8] perf c2c: Display "Total Stores" as a standalone metrics Leo Yan
2020-10-14  5:09 ` [PATCH v1 3/8] perf c2c: Organize metrics based on memory hierarchy Leo Yan
2020-10-14  5:09 ` Leo Yan [this message]
2020-10-14  5:09 ` [PATCH v1 5/8] perf c2c: Use more explicit headers for HITM Leo Yan
2020-10-14  5:09 ` [PATCH v1 6/8] perf c2c: Change header for LLC local hit Leo Yan
2020-10-14  5:09 ` [PATCH v1 7/8] perf c2c: Correct LLC load hit metrics Leo Yan
2020-10-14  5:09 ` [PATCH v1 8/8] perf c2c: Add metrics "RMT Load Hit" Leo Yan
2020-10-14 14:03 ` [PATCH v1 0/8] perf c2c: Refine the organization of metrics Jiri Olsa
2020-10-14 18:38 ` Joe Mario
2020-10-15 15:04   ` Leo Yan

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201014050921.5591-5-leo.yan@linaro.org \
    --to=leo.yan@linaro.org \
    --cc=Al.Grant@arm.com \
    --cc=acme@kernel.org \
    --cc=ak@linux.intel.com \
    --cc=alexander.shishkin@linux.intel.com \
    --cc=dsahern@gmail.com \
    --cc=dzickus@redhat.com \
    --cc=james.clark@arm.com \
    --cc=jmario@redhat.com \
    --cc=jolsa@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=mingo@redhat.com \
    --cc=namhyung@kernel.org \
    --cc=peterz@infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).