[PATCH v5 11/17] perf c2c: Use explicit names for display macros

Leo Yan
2022-06-04T04:30:19Z

Perf c2c tool has an assumption that it heavily depends on HITM snoop
type to detect cache false sharing, unfortunately, HITM is not supported
on some architectures.

Essentially, perf c2c tool wants to find some very costly snooping
operations for false cache sharing, this means it's not necessarily
to stick using HITM tags and we can explore other snooping types
(e.g. SNOOPX_PEER).

For this reason, this patch renames HITM related display macros with
suffix '_HITM', so it can be distinct if later add more display types
for on other snooping type.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Ian Rogers <irogers@google.com>
Tested-by: Ali Saidi <alisaidi@amazon.com>
Reviewed-by: Ali Saidi <alisaidi@amazon.com>
---
tools/perf/builtin-c2c.c | 58 ++++++++++++++++++++--------------------
1 file changed, 29 insertions(+), 29 deletions(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 8dd9218a052f..cbeb1878a71c 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -115,16 +115,16 @@ struct perf_c2c {
};

enum {
- DISPLAY_LCL,
- DISPLAY_RMT,
- DISPLAY_TOT,
+ DISPLAY_LCL_HITM,
+ DISPLAY_RMT_HITM,
+ DISPLAY_TOT_HITM,
DISPLAY_MAX,
};

static const char *display_str[DISPLAY_MAX] = {
- [DISPLAY_LCL] = "Local",
- [DISPLAY_RMT] = "Remote",
- [DISPLAY_TOT] = "Total",
+ [DISPLAY_LCL_HITM] = "Local",
+ [DISPLAY_RMT_HITM] = "Remote",
+ [DISPLAY_TOT_HITM] = "Total",
};

static const struct option c2c_options[] = {
@@ -811,15 +811,15 @@ static double percent_hitm(struct c2c_hist_entry *c2c_he)
total = &hists->stats;

switch (c2c.display) {
- case DISPLAY_RMT:
+ case DISPLAY_RMT_HITM:
st = stats->rmt_hitm;
tot = total->rmt_hitm;
break;
- case DISPLAY_LCL:
+ case DISPLAY_LCL_HITM:
st = stats->lcl_hitm;
tot = total->lcl_hitm;
break;
- case DISPLAY_TOT:
+ case DISPLAY_TOT_HITM:
st = stats->tot_hitm;
tot = total->tot_hitm;
default:
@@ -1217,15 +1217,15 @@ node_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
advance_hpp(hpp, ret);

switch (c2c.display) {
- case DISPLAY_RMT:
+ case DISPLAY_RMT_HITM:
ret = display_metrics(hpp, stats->rmt_hitm,
c2c_he->stats.rmt_hitm);
break;
- case DISPLAY_LCL:
+ case DISPLAY_LCL_HITM:
ret = display_metrics(hpp, stats->lcl_hitm,
c2c_he->stats.lcl_hitm);
break;
- case DISPLAY_TOT:
+ case DISPLAY_TOT_HITM:
ret = display_metrics(hpp, stats->tot_hitm,
c2c_he->stats.tot_hitm);
break;
@@ -1606,9 +1606,9 @@ static struct c2c_dimension dim_tot_loads = {
};

static struct c2c_header percent_hitm_header[] = {
- [DISPLAY_LCL] = HEADER_BOTH("Lcl", "Hitm"),
- [DISPLAY_RMT] = HEADER_BOTH("Rmt", "Hitm"),
- [DISPLAY_TOT] = HEADER_BOTH("Tot", "Hitm"),
+ [DISPLAY_LCL_HITM] = HEADER_BOTH("Lcl", "Hitm"),
+ [DISPLAY_RMT_HITM] = HEADER_BOTH("Rmt", "Hitm"),
+ [DISPLAY_TOT_HITM] = HEADER_BOTH("Tot", "Hitm"),
};

static struct c2c_dimension dim_percent_hitm = {
@@ -2101,15 +2101,15 @@ static bool he__display(struct hist_entry *he, struct c2c_stats *stats)
c2c_he = container_of(he, struct c2c_hist_entry, he);

switch (c2c.display) {
- case DISPLAY_LCL:
+ case DISPLAY_LCL_HITM:
he->filtered = filter_display(c2c_he->stats.lcl_hitm,
stats->lcl_hitm);
break;
- case DISPLAY_RMT:
+ case DISPLAY_RMT_HITM:
he->filtered = filter_display(c2c_he->stats.rmt_hitm,
stats->rmt_hitm);
break;
- case DISPLAY_TOT:
+ case DISPLAY_TOT_HITM:
he->filtered = filter_display(c2c_he->stats.tot_hitm,
stats->tot_hitm);
break;
@@ -2132,13 +2132,13 @@ static inline bool is_valid_hist_entry(struct hist_entry *he)
return true;

switch (c2c.display) {
- case DISPLAY_LCL:
+ case DISPLAY_LCL_HITM:
has_record = !!c2c_he->stats.lcl_hitm;
break;
- case DISPLAY_RMT:
+ case DISPLAY_RMT_HITM:
has_record = !!c2c_he->stats.rmt_hitm;
break;
- case DISPLAY_TOT:
+ case DISPLAY_TOT_HITM:
has_record = !!c2c_he->stats.tot_hitm;
break;
default:
@@ -2835,11 +2835,11 @@ static int setup_display(const char *str)
const char *display = str ?: "tot";

if (!strcmp(display, "tot"))
- c2c.display = DISPLAY_TOT;
+ c2c.display = DISPLAY_TOT_HITM;
else if (!strcmp(display, "rmt"))
- c2c.display = DISPLAY_RMT;
+ c2c.display = DISPLAY_RMT_HITM;
else if (!strcmp(display, "lcl"))
- c2c.display = DISPLAY_LCL;
+ c2c.display = DISPLAY_LCL_HITM;
else {
pr_err("failed: unknown display type: %s\n", str);
return -1;
@@ -2927,9 +2927,9 @@ static int setup_coalesce(const char *coalesce, bool no_source)
return -1;

if (asprintf(&c2c.cl_resort, "offset,%s",
- c2c.display == DISPLAY_TOT ?
+ c2c.display == DISPLAY_TOT_HITM ?
"tot_hitm" :
- c2c.display == DISPLAY_RMT ?
+ c2c.display == DISPLAY_RMT_HITM ?
"rmt_hitm,lcl_hitm" :
"lcl_hitm,rmt_hitm") < 0)
return -ENOMEM;
@@ -3087,11 +3087,11 @@ static int perf_c2c__report(int argc, const char **argv)
"ld_rmthit,rmt_hitm,"
"dram_lcl,dram_rmt";

- if (c2c.display == DISPLAY_TOT)
+ if (c2c.display == DISPLAY_TOT_HITM)
sort_str = "tot_hitm";
- else if (c2c.display == DISPLAY_RMT)
+ else if (c2c.display == DISPLAY_RMT_HITM)
sort_str = "rmt_hitm";
- else if (c2c.display == DISPLAY_LCL)
+ else if (c2c.display == DISPLAY_LCL_HITM)
sort_str = "lcl_hitm";

c2c_hists__reinit(&c2c.hists, output_str, sort_str);
--
2.25.1