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Date: Wed, 27 Apr 2022 23:50:11 +0800
From: Leo Yan <leo.yan@...aro.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Ian Rogers <irogers@...gle.com>, Alyssa Ross <hi@...ssa.is>,
Like Xu <likexu@...cent.com>, Kajol Jain <kjain@...ux.ibm.com>,
Li Huafei <lihuafei1@...wei.com>,
Ali Saidi <alisaidi@...zon.com>,
German Gomez <german.gomez@....com>,
James Clark <james.clark@....com>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v1 09/11] perf c2c: Sort on peer snooping for load operations
Except the existed three display options 'tot', 'rmt', 'lcl', this patch
adds a new option 'peer' so can sort on the cache hit for peer snooping.
For displaying with option 'peer', the "Shared Data Cache Line Table" and
"Shared Cache Line Distribution Pareto" both sort with the metrics
"ld_peer". As result, we can get the 'peer' display as below:
# perf c2c report -d peer --coalesce tid,pid,iaddr,dso -N --stdio
[...]
=================================================
Shared Data Cache Line Table
=================================================
#
# ----------- Cacheline ---------- Snoop ------- Load Hitm ------- Snoop Total Total Total --------- Stores -------- ----- Core Load Hit ----- - LLC Load Hit -- - RMT Load Hit -- --- Load Dram ----
# Index Address Node PA cnt Peer Total LclHitm RmtHitm Peer records Loads Stores L1Hit L1Miss Anylvl FB L1 L2 LclHit LclHitm RmtHit RmtHitm Lcl Rmt
# ..... .................. .... ...... ....... ....... ....... ....... ....... ....... ....... ....... ....... ....... ....... ....... ....... ....... ........ ....... ........ ....... ........ ........
#
0 0xaaaac17d6000 N/A 0 100.00% 0 0 0 99 18851 18851 0 0 0 0 0 18752 0 0 0 0 0 0 0
=================================================
Shared Cache Line Distribution Pareto
=================================================
#
# ----- HITM ----- Snoop ------- Store Refs ------ --------- Data address --------- --------------- cycles --------------- Total cpu Shared
# Num RmtHitm LclHitm Peer L1 Hit L1 Miss Any Lvl Offset Node PA cnt Pid Tid Code address rmt hitm lcl hitm load peer records cnt Symbol Object Source:Line Node{cpus %peers %stores}
# ..... ....... ....... ....... ....... ....... ....... .................. .... ...... ....... ................. .................. ........ ........ ........ ........ ....... ........ ...................... ................ ............... ....
#
-------------------------------------------------------------------------------
0 0 0 99 0 0 0 0xaaaac17d6000
-------------------------------------------------------------------------------
0.00% 0.00% 3.03% 0.00% 0.00% 0.00% 0x20 N/A 0 3603 3603:memstress 0xaaaac17c25ac 0 0 41 376 9314 2 [.] 0x00000000000025ac memstress memstress[25ac] 0{ 2 100.0% n/a}
0.00% 0.00% 3.03% 0.00% 0.00% 0.00% 0x20 N/A 0 3603 3606:memstress 0xaaaac17c25ac 0 0 44 375 9155 1 [.] 0x00000000000025ac memstress memstress[25ac] 0{ 1 100.0% n/a}
0.00% 0.00% 48.48% 0.00% 0.00% 0.00% 0x29 N/A 0 3603 3606:memstress 0xaaaac17c3e88 0 0 170 180 65 1 [.] 0x0000000000003e88 memstress memstress[3e88] 0{ 1 100.0% n/a}
0.00% 0.00% 45.45% 0.00% 0.00% 0.00% 0x29 N/A 0 3603 3603:memstress 0xaaaac17c3e88 0 0 175 180 70 2 [.] 0x0000000000003e88 memstress memstress[3e88] 0{ 2 100.0% n/a}
[...]
Signed-off-by: Leo Yan <leo.yan@...aro.org>
Tested-by: Ali Saidi <alisaidi@...zon.com>
---
tools/perf/builtin-c2c.c | 63 +++++++++++++++++++++++++++++++---------
1 file changed, 49 insertions(+), 14 deletions(-)
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 52542cfec80c..bd4516e486c0 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -117,13 +117,15 @@ enum {
DISPLAY_LCL_HITM,
DISPLAY_RMT_HITM,
DISPLAY_TOT_HITM,
+ DISPLAY_SNP_PEER,
DISPLAY_MAX,
};
static const char *display_str[DISPLAY_MAX] = {
- [DISPLAY_LCL_HITM] = "Local",
- [DISPLAY_RMT_HITM] = "Remote",
- [DISPLAY_TOT_HITM] = "Total",
+ [DISPLAY_LCL_HITM] = "Local HITMs",
+ [DISPLAY_RMT_HITM] = "Remote HITMs",
+ [DISPLAY_TOT_HITM] = "Total HITMs",
+ [DISPLAY_SNP_PEER] = "Snoop Peers",
};
static const struct option c2c_options[] = {
@@ -818,6 +820,11 @@ static double percent_costly_snoop(struct c2c_hist_entry *c2c_he)
case DISPLAY_TOT_HITM:
st = stats->tot_hitm;
tot = total->tot_hitm;
+ break;
+ case DISPLAY_SNP_PEER:
+ st = stats->ld_peer;
+ tot = total->ld_peer;
+ break;
default:
break;
}
@@ -1193,6 +1200,10 @@ node_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
ret = display_metrics(hpp, stats->tot_hitm,
c2c_he->stats.tot_hitm);
break;
+ case DISPLAY_SNP_PEER:
+ ret = display_metrics(hpp, stats->ld_peer,
+ c2c_he->stats.ld_peer);
+ break;
default:
break;
}
@@ -1548,6 +1559,7 @@ static struct c2c_header percent_costly_snoop_header[] = {
[DISPLAY_LCL_HITM] = HEADER_BOTH("Lcl", "Hitm"),
[DISPLAY_RMT_HITM] = HEADER_BOTH("Rmt", "Hitm"),
[DISPLAY_TOT_HITM] = HEADER_BOTH("Tot", "Hitm"),
+ [DISPLAY_SNP_PEER] = HEADER_BOTH("Snoop", "Peer"),
};
static struct c2c_dimension dim_percent_costly_snoop = {
@@ -2024,6 +2036,10 @@ static bool he__display(struct hist_entry *he, struct c2c_stats *stats)
he->filtered = filter_display(c2c_he->stats.tot_hitm,
stats->tot_hitm);
break;
+ case DISPLAY_SNP_PEER:
+ he->filtered = filter_display(c2c_he->stats.ld_peer,
+ stats->ld_peer);
+ break;
default:
break;
}
@@ -2052,6 +2068,8 @@ static inline bool is_valid_hist_entry(struct hist_entry *he)
case DISPLAY_TOT_HITM:
has_record = !!c2c_he->stats.tot_hitm;
break;
+ case DISPLAY_SNP_PEER:
+ has_record = !!c2c_he->stats.ld_peer;
default:
break;
}
@@ -2141,7 +2159,10 @@ static int resort_cl_cb(struct hist_entry *he, void *arg __maybe_unused)
}
static struct c2c_header header_node_0 = HEADER_LOW("Node");
-static struct c2c_header header_node_1 = HEADER_LOW("Node{cpus %hitms %stores}");
+static struct c2c_header header_node_1_hitms_stores =
+ HEADER_LOW("Node{cpus %hitms %stores}");
+static struct c2c_header header_node_1_peers_stores =
+ HEADER_LOW("Node{cpus %peers %stores}");
static struct c2c_header header_node_2 = HEADER_LOW("Node{cpu list}");
static void setup_nodes_header(void)
@@ -2151,7 +2172,10 @@ static void setup_nodes_header(void)
dim_node.header = header_node_0;
break;
case 1:
- dim_node.header = header_node_1;
+ if (c2c.display == DISPLAY_SNP_PEER)
+ dim_node.header = header_node_1_peers_stores;
+ else
+ dim_node.header = header_node_1_hitms_stores;
break;
case 2:
dim_node.header = header_node_2;
@@ -2225,13 +2249,15 @@ static int setup_nodes(struct perf_session *session)
}
#define HAS_HITMS(__h) ((__h)->stats.lcl_hitm || (__h)->stats.rmt_hitm)
+#define HAS_PEER(__h) ((__h)->stats.ld_peer)
static int resort_shared_cl_cb(struct hist_entry *he, void *arg __maybe_unused)
{
struct c2c_hist_entry *c2c_he;
c2c_he = container_of(he, struct c2c_hist_entry, he);
- if (HAS_HITMS(c2c_he)) {
+ if ((c2c.display != DISPLAY_SNP_PEER && HAS_HITMS(c2c_he)) ||
+ (c2c.display == DISPLAY_SNP_PEER && HAS_PEER(c2c_he))) {
c2c.shared_clines++;
c2c_add_stats(&c2c.shared_clines_stats, &c2c_he->stats);
}
@@ -2406,7 +2432,7 @@ static void print_c2c_info(FILE *out, struct perf_session *session)
fprintf(out, "%-36s: %s\n", first ? " Events" : "", evsel__name(evsel));
first = false;
}
- fprintf(out, " Cachelines sort on : %s HITMs\n",
+ fprintf(out, " Cachelines sort on : %s\n",
display_str[c2c.display]);
fprintf(out, " Cacheline data grouping : %s\n", c2c.cl_sort);
}
@@ -2563,7 +2589,7 @@ static int perf_c2c_browser__title(struct hist_browser *browser,
{
scnprintf(bf, size,
"Shared Data Cache Line Table "
- "(%lu entries, sorted on %s HITMs)",
+ "(%lu entries, sorted on %s)",
browser->nr_non_filtered_entries,
display_str[c2c.display]);
return 0;
@@ -2769,6 +2795,8 @@ static int setup_display(const char *str)
c2c.display = DISPLAY_RMT_HITM;
else if (!strcmp(display, "lcl"))
c2c.display = DISPLAY_LCL_HITM;
+ else if (!strcmp(display, "peer"))
+ c2c.display = DISPLAY_SNP_PEER;
else {
pr_err("failed: unknown display type: %s\n", str);
return -1;
@@ -2850,6 +2878,7 @@ static int build_cl_output(char *cl_sort, bool no_source)
static int setup_coalesce(const char *coalesce, bool no_source)
{
const char *c = coalesce ?: coalesce_default;
+ const char *sort_str = NULL;
if (asprintf(&c2c.cl_sort, "offset,%s", c) < 0)
return -ENOMEM;
@@ -2857,12 +2886,16 @@ static int setup_coalesce(const char *coalesce, bool no_source)
if (build_cl_output(c2c.cl_sort, no_source))
return -1;
- if (asprintf(&c2c.cl_resort, "offset,%s",
- c2c.display == DISPLAY_TOT_HITM ?
- "tot_hitm" :
- c2c.display == DISPLAY_RMT_HITM ?
- "rmt_hitm,lcl_hitm" :
- "lcl_hitm,rmt_hitm") < 0)
+ if (c2c.display == DISPLAY_TOT_HITM)
+ sort_str = "tot_hitm";
+ else if (c2c.display == DISPLAY_RMT_HITM)
+ sort_str = "rmt_hitm,lcl_hitm";
+ else if (c2c.display == DISPLAY_LCL_HITM)
+ sort_str = "lcl_hitm,rmt_hitm";
+ else if (c2c.display == DISPLAY_SNP_PEER)
+ sort_str = "ld_peer";
+
+ if (asprintf(&c2c.cl_resort, "offset,%s", sort_str) < 0)
return -ENOMEM;
pr_debug("coalesce sort fields: %s\n", c2c.cl_sort);
@@ -3023,6 +3056,8 @@ static int perf_c2c__report(int argc, const char **argv)
sort_str = "rmt_hitm";
else if (c2c.display == DISPLAY_LCL_HITM)
sort_str = "lcl_hitm";
+ else if (c2c.display == DISPLAY_SNP_PEER)
+ sort_str = "ld_peer";
c2c_hists__reinit(&c2c.hists, output_str, sort_str);
--
2.25.1
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