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authorIan Rogers2021-11-10 16:21:04 -0800
committerArnaldo Carvalho de Melo2021-11-13 18:11:50 -0300
commit406018dcc12142f486a9b97bb958d43376bc7bb0 (patch)
tree6a07da349107d6ef6d7d91af141eebd3d39c377c /tools/perf
parent48f07b0b2a3ebe3278ff4257e540084157f8b4dc (diff)
perf cputopo: Match die_siblings to topology ABI name
The topology name for die_siblings is die_cpus_list, use this for consistency and add documentation. Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: John Garry <john.garry@huawei.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul A . Clarke <pc@us.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Riccardo Mancini <rickyman7@gmail.com> Cc: Song Liu <song@kernel.org> Cc: Wan Jiabing <wanjiabing@vivo.com> Cc: Yury Norov <yury.norov@gmail.com> Link: https://lore.kernel.org/r/20211111002109.194172-4-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/cputopo.c26
-rw-r--r--tools/perf/util/cputopo.h11
-rw-r--r--tools/perf/util/header.c8
3 files changed, 25 insertions, 20 deletions
diff --git a/tools/perf/util/cputopo.c b/tools/perf/util/cputopo.c
index f72a7de19e02..420aeda16fbb 100644
--- a/tools/perf/util/cputopo.c
+++ b/tools/perf/util/cputopo.c
@@ -18,7 +18,7 @@
"%s/devices/system/cpu/cpu%d/topology/package_cpus_list"
#define PACKAGE_CPUS_FMT_OLD \
"%s/devices/system/cpu/cpu%d/topology/core_siblings_list"
-#define DIE_SIB_FMT \
+#define DIE_CPUS_FMT \
"%s/devices/system/cpu/cpu%d/topology/die_cpus_list"
#define THRD_SIB_FMT \
"%s/devices/system/cpu/cpu%d/topology/thread_siblings_list"
@@ -73,10 +73,10 @@ static int build_cpu_topology(struct cpu_topology *tp, int cpu)
ret = 0;
try_dies:
- if (!tp->die_siblings)
+ if (!tp->die_cpus_list)
goto try_threads;
- scnprintf(filename, MAXPATHLEN, DIE_SIB_FMT,
+ scnprintf(filename, MAXPATHLEN, DIE_CPUS_FMT,
sysfs__mountpoint(), cpu);
fp = fopen(filename, "r");
if (!fp)
@@ -91,13 +91,13 @@ try_dies:
if (p)
*p = '\0';
- for (i = 0; i < tp->die_sib; i++) {
- if (!strcmp(buf, tp->die_siblings[i]))
+ for (i = 0; i < tp->die_cpus_lists; i++) {
+ if (!strcmp(buf, tp->die_cpus_list[i]))
break;
}
- if (i == tp->die_sib) {
- tp->die_siblings[i] = buf;
- tp->die_sib++;
+ if (i == tp->die_cpus_lists) {
+ tp->die_cpus_list[i] = buf;
+ tp->die_cpus_lists++;
buf = NULL;
len = 0;
}
@@ -148,10 +148,8 @@ void cpu_topology__delete(struct cpu_topology *tp)
for (i = 0 ; i < tp->package_cpus_lists; i++)
zfree(&tp->package_cpus_list[i]);
- if (tp->die_sib) {
- for (i = 0 ; i < tp->die_sib; i++)
- zfree(&tp->die_siblings[i]);
- }
+ for (i = 0 ; i < tp->die_cpus_lists; i++)
+ zfree(&tp->die_cpus_list[i]);
for (i = 0 ; i < tp->thread_sib; i++)
zfree(&tp->thread_siblings[i]);
@@ -170,7 +168,7 @@ static bool has_die_topology(void)
if (strncmp(uts.machine, "x86_64", 6))
return false;
- scnprintf(filename, MAXPATHLEN, DIE_SIB_FMT,
+ scnprintf(filename, MAXPATHLEN, DIE_CPUS_FMT,
sysfs__mountpoint(), 0);
if (access(filename, F_OK) == -1)
return false;
@@ -214,7 +212,7 @@ struct cpu_topology *cpu_topology__new(void)
tp->package_cpus_list = addr;
addr += sz;
if (has_die) {
- tp->die_siblings = addr;
+ tp->die_cpus_list = addr;
addr += sz;
}
tp->thread_siblings = addr;
diff --git a/tools/perf/util/cputopo.h b/tools/perf/util/cputopo.h
index 4ec9cb192c3d..a3e01c367853 100644
--- a/tools/perf/util/cputopo.h
+++ b/tools/perf/util/cputopo.h
@@ -7,7 +7,8 @@
struct cpu_topology {
/* The number of unique package_cpus_lists below. */
u32 package_cpus_lists;
- u32 die_sib;
+ /* The number of unique die_cpu_lists below. */
+ u32 die_cpus_lists;
u32 thread_sib;
/*
* An array of strings where each string is unique and read from
@@ -16,7 +17,13 @@ struct cpu_topology {
* physical_package_id. The format is like 0-3, 8-11, 14,17.
*/
const char **package_cpus_list;
- char **die_siblings;
+ /*
+ * An array of string where each string is unique and from
+ * /sys/devices/system/cpu/cpuX/topology/die_cpus_list. From the ABI
+ * each of these is a human-readable list of CPUs within the same die.
+ * The format is like 0-3, 8-11, 14,17.
+ */
+ const char **die_cpus_list;
char **thread_siblings;
};
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 4e89cd35345b..e2ba261d1583 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -617,15 +617,15 @@ static int write_cpu_topology(struct feat_fd *ff,
return ret;
}
- if (!tp->die_sib)
+ if (!tp->die_cpus_lists)
goto done;
- ret = do_write(ff, &tp->die_sib, sizeof(tp->die_sib));
+ ret = do_write(ff, &tp->die_cpus_lists, sizeof(tp->die_cpus_lists));
if (ret < 0)
goto done;
- for (i = 0; i < tp->die_sib; i++) {
- ret = do_write_string(ff, tp->die_siblings[i]);
+ for (i = 0; i < tp->die_cpus_lists; i++) {
+ ret = do_write_string(ff, tp->die_cpus_list[i]);
if (ret < 0)
goto done;
}