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Message-Id: <20211105170943.3479315-4-irogers@google.com>
Date: Fri, 5 Nov 2021 10:09:39 -0700
From: Ian Rogers <irogers@...gle.com>
To: Andi Kleen <ak@...ux.intel.com>, Jiri Olsa <jolsa@...hat.com>,
Jin Yao <yao.jin@...ux.intel.com>,
Namhyung Kim <namhyung@...nel.org>,
John Garry <john.garry@...wei.com>,
Kajol Jain <kjain@...ux.ibm.com>,
"Paul A . Clarke" <pc@...ibm.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Riccardo Mancini <rickyman7@...il.com>,
Kan Liang <kan.liang@...ux.intel.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Madhavan Srinivasan <maddy@...ux.ibm.com>,
Song Liu <song@...nel.org>, Wan Jiabing <wanjiabing@...o.com>,
Yury Norov <yury.norov@...il.com>,
Changbin Du <changbin.du@...el.com>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Ian Rogers <irogers@...gle.com>
Subject: [PATCH 3/7] 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@...gle.com>
---
tools/perf/util/cputopo.c | 26 ++++++++++++--------------
tools/perf/util/cputopo.h | 11 +++++++++--
tools/perf/util/header.c | 8 ++++----
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 @@ static int build_cpu_topology(struct cpu_topology *tp, int cpu)
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 212512b9feb0..65ec250f3619 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -616,15 +616,15 @@ 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;
}
--
2.34.0.rc0.344.g81b53c2807-goog
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