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Message-ID: <20250826051039.2626894-6-swapnil.sapkal@amd.com>
Date: Tue, 26 Aug 2025 05:10:33 +0000
From: Swapnil Sapkal <swapnil.sapkal@....com>
To: <peterz@...radead.org>, <mingo@...hat.com>, <juri.lelli@...hat.com>,
<vincent.guittot@...aro.org>, <corbet@....net>
CC: <dietmar.eggemann@....com>, <rostedt@...dmis.org>, <bsegall@...gle.com>,
<mgorman@...e.de>, <vschneid@...hat.com>, <iamjoonsoo.kim@....com>,
<qyousef@...alina.io>, <sshegde@...ux.ibm.com>, <alexs@...nel.org>,
<lukasz.luba@....com>, <cpru@...zon.com>, <gautham.shenoy@....com>,
<kprateek.nayak@....com>, <ravi.bangoria@....com>, <swapnil.sapkal@....com>,
<linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>, James Clark
<james.clark@...aro.org>
Subject: [PATCH v4 05/11] perf sched stats: Add schedstat v16 support
/proc/schedstat file output is standardized with version number.
Add support to record and raw dump v16 version layout.
Co-developed-by: Ravi Bangoria <ravi.bangoria@....com>
Signed-off-by: Ravi Bangoria <ravi.bangoria@....com>
Tested-by: James Clark <james.clark@...aro.org>
Signed-off-by: Swapnil Sapkal <swapnil.sapkal@....com>
---
tools/lib/perf/Makefile | 2 +-
tools/lib/perf/include/perf/event.h | 14 ++
tools/lib/perf/include/perf/schedstat-v16.h | 146 ++++++++++++++++++++
tools/perf/util/event.c | 6 +
tools/perf/util/synthetic-events.c | 6 +
5 files changed, 173 insertions(+), 1 deletion(-)
create mode 100644 tools/lib/perf/include/perf/schedstat-v16.h
diff --git a/tools/lib/perf/Makefile b/tools/lib/perf/Makefile
index 9fa28e512ca8..965e066fd780 100644
--- a/tools/lib/perf/Makefile
+++ b/tools/lib/perf/Makefile
@@ -179,7 +179,7 @@ install_lib: libs
cp -fpR $(LIBPERF_ALL) $(DESTDIR)$(libdir_SQ)
HDRS := bpf_perf.h core.h cpumap.h threadmap.h evlist.h evsel.h event.h mmap.h
-HDRS += schedstat-v15.h
+HDRS += schedstat-v15.h schedstat-v16.h
INTERNAL_HDRS := cpumap.h evlist.h evsel.h lib.h mmap.h rc_check.h threadmap.h xyarray.h
INSTALL_HDRS_PFX := $(DESTDIR)$(prefix)/include/perf
diff --git a/tools/lib/perf/include/perf/event.h b/tools/lib/perf/include/perf/event.h
index 7ed7bae73b55..4c38a58e19c3 100644
--- a/tools/lib/perf/include/perf/event.h
+++ b/tools/lib/perf/include/perf/event.h
@@ -489,6 +489,12 @@ struct perf_record_schedstat_cpu_v15 {
#undef CPU_FIELD
};
+struct perf_record_schedstat_cpu_v16 {
+#define CPU_FIELD(_type, _name, _desc, _format, _is_pct, _pct_of, _ver) _type _name
+#include "schedstat-v16.h"
+#undef CPU_FIELD
+};
+
struct perf_record_schedstat_cpu {
struct perf_event_header header;
__u64 timestamp;
@@ -498,6 +504,7 @@ struct perf_record_schedstat_cpu {
char __pad[2];
union {
struct perf_record_schedstat_cpu_v15 v15;
+ struct perf_record_schedstat_cpu_v16 v16;
};
};
@@ -507,6 +514,12 @@ struct perf_record_schedstat_domain_v15 {
#undef DOMAIN_FIELD
};
+struct perf_record_schedstat_domain_v16 {
+#define DOMAIN_FIELD(_type, _name, _desc, _format, _is_jiffies, _ver) _type _name
+#include "schedstat-v16.h"
+#undef DOMAIN_FIELD
+};
+
#define DOMAIN_NAME_LEN 16
struct perf_record_schedstat_domain {
@@ -517,6 +530,7 @@ struct perf_record_schedstat_domain {
__u16 domain;
union {
struct perf_record_schedstat_domain_v15 v15;
+ struct perf_record_schedstat_domain_v16 v16;
};
};
diff --git a/tools/lib/perf/include/perf/schedstat-v16.h b/tools/lib/perf/include/perf/schedstat-v16.h
new file mode 100644
index 000000000000..3462b79c29af
--- /dev/null
+++ b/tools/lib/perf/include/perf/schedstat-v16.h
@@ -0,0 +1,146 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifdef CPU_FIELD
+CPU_FIELD(__u32, yld_count, "sched_yield() count",
+ "%11u", false, yld_count, v16);
+CPU_FIELD(__u32, array_exp, "Legacy counter can be ignored",
+ "%11u", false, array_exp, v16);
+CPU_FIELD(__u32, sched_count, "schedule() called",
+ "%11u", false, sched_count, v16);
+CPU_FIELD(__u32, sched_goidle, "schedule() left the processor idle",
+ "%11u", true, sched_count, v16);
+CPU_FIELD(__u32, ttwu_count, "try_to_wake_up() was called",
+ "%11u", false, ttwu_count, v16);
+CPU_FIELD(__u32, ttwu_local, "try_to_wake_up() was called to wake up the local cpu",
+ "%11u", true, ttwu_count, v16);
+CPU_FIELD(__u64, rq_cpu_time, "total runtime by tasks on this processor (in jiffies)",
+ "%11llu", false, rq_cpu_time, v16);
+CPU_FIELD(__u64, run_delay, "total waittime by tasks on this processor (in jiffies)",
+ "%11llu", true, rq_cpu_time, v16);
+CPU_FIELD(__u64, pcount, "total timeslices run on this cpu",
+ "%11llu", false, pcount, v16);
+#endif /* CPU_FIELD */
+
+#ifdef DOMAIN_FIELD
+#ifdef DOMAIN_CATEGORY
+DOMAIN_CATEGORY(" <Category busy> ");
+#endif
+DOMAIN_FIELD(__u32, busy_lb_count,
+ "load_balance() count on cpu busy", "%11u", true, v16);
+DOMAIN_FIELD(__u32, busy_lb_balanced,
+ "load_balance() found balanced on cpu busy", "%11u", true, v16);
+DOMAIN_FIELD(__u32, busy_lb_failed,
+ "load_balance() move task failed on cpu busy", "%11u", true, v16);
+DOMAIN_FIELD(__u32, busy_lb_imbalance,
+ "imbalance sum on cpu busy", "%11u", false, v16);
+DOMAIN_FIELD(__u32, busy_lb_gained,
+ "pull_task() count on cpu busy", "%11u", false, v16);
+DOMAIN_FIELD(__u32, busy_lb_hot_gained,
+ "pull_task() when target task was cache-hot on cpu busy", "%11u", false, v16);
+DOMAIN_FIELD(__u32, busy_lb_nobusyq,
+ "load_balance() failed to find busier queue on cpu busy", "%11u", true, v16);
+DOMAIN_FIELD(__u32, busy_lb_nobusyg,
+ "load_balance() failed to find busier group on cpu busy", "%11u", true, v16);
+#ifdef DERIVED_CNT_FIELD
+DERIVED_CNT_FIELD(busy_lb_success_count, "load_balance() success count on cpu busy", "%11u",
+ busy_lb_count, busy_lb_balanced, busy_lb_failed, v16);
+#endif
+#ifdef DERIVED_AVG_FIELD
+DERIVED_AVG_FIELD(busy_lb_avg_pulled,
+ "avg task pulled per successful lb attempt (cpu busy)", "%11.2Lf",
+ busy_lb_count, busy_lb_balanced, busy_lb_failed, busy_lb_gained, v16);
+#endif
+#ifdef DOMAIN_CATEGORY
+DOMAIN_CATEGORY(" <Category idle> ");
+#endif
+DOMAIN_FIELD(__u32, idle_lb_count,
+ "load_balance() count on cpu idle", "%11u", true, v16);
+DOMAIN_FIELD(__u32, idle_lb_balanced,
+ "load_balance() found balanced on cpu idle", "%11u", true, v16);
+DOMAIN_FIELD(__u32, idle_lb_failed,
+ "load_balance() move task failed on cpu idle", "%11u", true, v16);
+DOMAIN_FIELD(__u32, idle_lb_imbalance,
+ "imbalance sum on cpu idle", "%11u", false, v16);
+DOMAIN_FIELD(__u32, idle_lb_gained,
+ "pull_task() count on cpu idle", "%11u", false, v16);
+DOMAIN_FIELD(__u32, idle_lb_hot_gained,
+ "pull_task() when target task was cache-hot on cpu idle", "%11u", false, v16);
+DOMAIN_FIELD(__u32, idle_lb_nobusyq,
+ "load_balance() failed to find busier queue on cpu idle", "%11u", true, v16);
+DOMAIN_FIELD(__u32, idle_lb_nobusyg,
+ "load_balance() failed to find busier group on cpu idle", "%11u", true, v16);
+#ifdef DERIVED_CNT_FIELD
+DERIVED_CNT_FIELD(idle_lb_success_count, "load_balance() success count on cpu idle", "%11u",
+ idle_lb_count, idle_lb_balanced, idle_lb_failed, v16);
+#endif
+#ifdef DERIVED_AVG_FIELD
+DERIVED_AVG_FIELD(idle_lb_avg_pulled,
+ "avg task pulled per successful lb attempt (cpu idle)", "%11.2Lf",
+ idle_lb_count, idle_lb_balanced, idle_lb_failed, idle_lb_gained, v16);
+#endif
+#ifdef DOMAIN_CATEGORY
+DOMAIN_CATEGORY(" <Category newidle> ");
+#endif
+DOMAIN_FIELD(__u32, newidle_lb_count,
+ "load_balance() count on cpu newly idle", "%11u", true, v16);
+DOMAIN_FIELD(__u32, newidle_lb_balanced,
+ "load_balance() found balanced on cpu newly idle", "%11u", true, v16);
+DOMAIN_FIELD(__u32, newidle_lb_failed,
+ "load_balance() move task failed on cpu newly idle", "%11u", true, v16);
+DOMAIN_FIELD(__u32, newidle_lb_imbalance,
+ "imbalance sum on cpu newly idle", "%11u", false, v16);
+DOMAIN_FIELD(__u32, newidle_lb_gained,
+ "pull_task() count on cpu newly idle", "%11u", false, v16);
+DOMAIN_FIELD(__u32, newidle_lb_hot_gained,
+ "pull_task() when target task was cache-hot on cpu newly idle", "%11u", false, v16);
+DOMAIN_FIELD(__u32, newidle_lb_nobusyq,
+ "load_balance() failed to find busier queue on cpu newly idle", "%11u", true, v16);
+DOMAIN_FIELD(__u32, newidle_lb_nobusyg,
+ "load_balance() failed to find busier group on cpu newly idle", "%11u", true, v16);
+#ifdef DERIVED_CNT_FIELD
+DERIVED_CNT_FIELD(newidle_lb_success_count,
+ "load_balance() success count on cpu newly idle", "%11u",
+ newidle_lb_count, newidle_lb_balanced, newidle_lb_failed, v16);
+#endif
+#ifdef DERIVED_AVG_FIELD
+DERIVED_AVG_FIELD(newidle_lb_avg_count,
+ "avg task pulled per successful lb attempt (cpu newly idle)", "%11.2Lf",
+ newidle_lb_count, newidle_lb_balanced, newidle_lb_failed, newidle_lb_gained, v16);
+#endif
+#ifdef DOMAIN_CATEGORY
+DOMAIN_CATEGORY(" <Category active_load_balance()> ");
+#endif
+DOMAIN_FIELD(__u32, alb_count,
+ "active_load_balance() count", "%11u", false, v16);
+DOMAIN_FIELD(__u32, alb_failed,
+ "active_load_balance() move task failed", "%11u", false, v16);
+DOMAIN_FIELD(__u32, alb_pushed,
+ "active_load_balance() successfully moved a task", "%11u", false, v16);
+#ifdef DOMAIN_CATEGORY
+DOMAIN_CATEGORY(" <Category sched_balance_exec()> ");
+#endif
+DOMAIN_FIELD(__u32, sbe_count,
+ "sbe_count is not used", "%11u", false, v16);
+DOMAIN_FIELD(__u32, sbe_balanced,
+ "sbe_balanced is not used", "%11u", false, v16);
+DOMAIN_FIELD(__u32, sbe_pushed,
+ "sbe_pushed is not used", "%11u", false, v16);
+#ifdef DOMAIN_CATEGORY
+DOMAIN_CATEGORY(" <Category sched_balance_fork()> ");
+#endif
+DOMAIN_FIELD(__u32, sbf_count,
+ "sbf_count is not used", "%11u", false, v16);
+DOMAIN_FIELD(__u32, sbf_balanced,
+ "sbf_balanced is not used", "%11u", false, v16);
+DOMAIN_FIELD(__u32, sbf_pushed,
+ "sbf_pushed is not used", "%11u", false, v16);
+#ifdef DOMAIN_CATEGORY
+DOMAIN_CATEGORY(" <Wakeup Info> ");
+#endif
+DOMAIN_FIELD(__u32, ttwu_wake_remote,
+ "try_to_wake_up() awoke a task that last ran on a diff cpu", "%11u", false, v16);
+DOMAIN_FIELD(__u32, ttwu_move_affine,
+ "try_to_wake_up() moved task because cache-cold on own cpu", "%11u", false, v16);
+DOMAIN_FIELD(__u32, ttwu_move_balance,
+ "try_to_wake_up() started passive balancing", "%11u", false, v16);
+#endif /* DOMAIN_FIELD */
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 41fb942ef701..88a5dad240ac 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -584,6 +584,9 @@ size_t perf_event__fprintf_schedstat_cpu(union perf_event *event, FILE *fp)
if (version == 15) {
#include <perf/schedstat-v15.h>
return size;
+ } else if (version == 16) {
+#include <perf/schedstat-v16.h>
+ return size;
}
#undef CPU_FIELD
@@ -603,6 +606,9 @@ size_t perf_event__fprintf_schedstat_domain(union perf_event *event, FILE *fp)
if (version == 15) {
#include <perf/schedstat-v15.h>
return size;
+ } else if (version == 16) {
+#include <perf/schedstat-v16.h>
+ return size;
}
#undef DOMAIN_FIELD
diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c
index ef8d9613eab1..ebaaf53c1024 100644
--- a/tools/perf/util/synthetic-events.c
+++ b/tools/perf/util/synthetic-events.c
@@ -2567,6 +2567,8 @@ static union perf_event *__synthesize_schedstat_cpu(struct io *io, __u16 version
if (version == 15) {
#include <perf/schedstat-v15.h>
+ } else if (version == 16) {
+#include <perf/schedstat-v16.h>
}
#undef CPU_FIELD
@@ -2620,6 +2622,8 @@ static union perf_event *__synthesize_schedstat_domain(struct io *io, __u16 vers
if (version == 15) {
#include <perf/schedstat-v15.h>
+ } else if (version == 16) {
+#include <perf/schedstat-v16.h>
}
#undef DOMAIN_FIELD
@@ -2661,6 +2665,8 @@ int perf_event__synthesize_schedstat(const struct perf_tool *tool,
if (!strcmp(line, "version 15\n")) {
version = 15;
+ } else if (!strcmp(line, "version 16\n")) {
+ version = 16;
} else {
pr_err("Unsupported %s version: %s", path, line + 8);
goto out_free_line;
--
2.43.0
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