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authorKan Liang <kan.liang@linux.intel.com>2019-06-05 00:50:42 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2019-06-10 21:19:59 +0200
commitdb5742b6849ed7f01d764e6755b8ab2b422f29b2 (patch)
tree7b302de744f0c1c6b6af182e99754c1a34832153 /tools/perf/util/cpumap.c
parentperf header: Add die information in CPU topology (diff)
downloadlinux-db5742b6849ed7f01d764e6755b8ab2b422f29b2.tar.xz
linux-db5742b6849ed7f01d764e6755b8ab2b422f29b2.zip
perf stat: Support per-die aggregation
It is useful to aggregate counts per die. E.g. Uncore becomes die-scope on Xeon Cascade Lake-AP. Introduce a new option "--per-die" to support per-die aggregation. The global id for each core has been changed to socket + die id + core id. The global id for each die is socket + die id. Add die information for per-core aggregation. The output of per-core aggregation will be changed from "S0-C0" to "S0-D0-C0". Any scripts which rely on the output format of per-core aggregation probably be broken. For 'perf stat record/report', there is no die information when processing the old perf.data. The per-die result will be the same as per-socket. Committer notes: Renamed 'die' variable to 'die_id' to fix the build in some systems: CC /tmp/build/perf/builtin-script.o cc1: warnings being treated as errors builtin-stat.c: In function 'perf_env__get_die': builtin-stat.c:963: error: declaration of 'die' shadows a global declaration util/util.h:19: error: shadowed declaration is here mv: cannot stat `/tmp/build/perf/.builtin-stat.o.tmp': No such file or directory Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lkml.kernel.org/n/tip-bsnhx7vgsuu6ei307mw60mbj@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/cpumap.c')
-rw-r--r--tools/perf/util/cpumap.c57
1 files changed, 50 insertions, 7 deletions
diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index 7db1365c667e..c11a459ca582 100644
--- a/tools/perf/util/cpumap.c
+++ b/tools/perf/util/cpumap.c
@@ -380,6 +380,39 @@ int cpu_map__get_die_id(int cpu)
return ret ?: value;
}
+int cpu_map__get_die(struct cpu_map *map, int idx, void *data)
+{
+ int cpu, die_id, s;
+
+ if (idx > map->nr)
+ return -1;
+
+ cpu = map->map[idx];
+
+ die_id = cpu_map__get_die_id(cpu);
+ /* There is no die_id on legacy system. */
+ if (die_id == -1)
+ die_id = 0;
+
+ s = cpu_map__get_socket(map, idx, data);
+ if (s == -1)
+ return -1;
+
+ /*
+ * Encode socket in bit range 15:8
+ * die_id is relative to socket, and
+ * we need a global id. So we combine
+ * socket + die id
+ */
+ if (WARN_ONCE(die_id >> 8, "The die id number is too big.\n"))
+ return -1;
+
+ if (WARN_ONCE(s >> 8, "The socket id number is too big.\n"))
+ return -1;
+
+ return (s << 8) | (die_id & 0xff);
+}
+
int cpu_map__get_core_id(int cpu)
{
int value, ret = cpu__get_topology_int(cpu, "core_id", &value);
@@ -388,7 +421,7 @@ int cpu_map__get_core_id(int cpu)
int cpu_map__get_core(struct cpu_map *map, int idx, void *data)
{
- int cpu, s;
+ int cpu, s_die;
if (idx > map->nr)
return -1;
@@ -397,17 +430,22 @@ int cpu_map__get_core(struct cpu_map *map, int idx, void *data)
cpu = cpu_map__get_core_id(cpu);
- s = cpu_map__get_socket(map, idx, data);
- if (s == -1)
+ /* s_die is the combination of socket + die id */
+ s_die = cpu_map__get_die(map, idx, data);
+ if (s_die == -1)
return -1;
/*
- * encode socket in upper 16 bits
- * core_id is relative to socket, and
+ * encode socket in bit range 31:24
+ * encode die id in bit range 23:16
+ * core_id is relative to socket and die,
* we need a global id. So we combine
- * socket+ core id
+ * socket + die id + core id
*/
- return (s << 16) | (cpu & 0xffff);
+ if (WARN_ONCE(cpu >> 16, "The core id number is too big.\n"))
+ return -1;
+
+ return (s_die << 16) | (cpu & 0xffff);
}
int cpu_map__build_socket_map(struct cpu_map *cpus, struct cpu_map **sockp)
@@ -415,6 +453,11 @@ int cpu_map__build_socket_map(struct cpu_map *cpus, struct cpu_map **sockp)
return cpu_map__build_map(cpus, sockp, cpu_map__get_socket, NULL);
}
+int cpu_map__build_die_map(struct cpu_map *cpus, struct cpu_map **diep)
+{
+ return cpu_map__build_map(cpus, diep, cpu_map__get_die, NULL);
+}
+
int cpu_map__build_core_map(struct cpu_map *cpus, struct cpu_map **corep)
{
return cpu_map__build_map(cpus, corep, cpu_map__get_core, NULL);