perf c2c: Change header from "LLC Load Hitm" to "Load Hitm"

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>
Tested-by: Joe Mario <jmario@redhat.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20201014050921.5591-5-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 8947a8c48d5aacb79558eea45ae1d5cf9512c9f1..93f2d6c6c2b34e0da6e88fe1985c14d86d5dd18a 100644 (file)
--- 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,