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Message-ID: <20240917222820.197594-2-namhyung@kernel.org>
Date: Tue, 17 Sep 2024 15:28:16 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
Ian Rogers <irogers@...gle.com>,
Kan Liang <kan.liang@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>,
Adrian Hunter <adrian.hunter@...el.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...nel.org>,
LKML <linux-kernel@...r.kernel.org>,
linux-perf-users@...r.kernel.org,
Josh Poimboeuf <jpoimboe@...nel.org>,
Steven Rostedt <rostedt@...dmis.org>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Indu Bhagat <indu.bhagat@...cle.com>,
linux-toolchains@...r.kernel.org
Subject: [PATCH 1/5] perf tools: Sync UAPI perf_event.h header
To import defer_callchain changes.
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
tools/include/uapi/linux/perf_event.h | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index 4842c36fdf801996..a7f875eb29dd049a 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -460,7 +460,8 @@ struct perf_event_attr {
inherit_thread : 1, /* children only inherit if cloned with CLONE_THREAD */
remove_on_exec : 1, /* event is removed from task on exec */
sigtrap : 1, /* send synchronous SIGTRAP on event */
- __reserved_1 : 26;
+ defer_callchain: 1, /* generate PERF_RECORD_CALLCHAIN_DEFERRED records */
+ __reserved_1 : 25;
union {
__u32 wakeup_events; /* wakeup every n events */
@@ -1217,6 +1218,23 @@ enum perf_event_type {
*/
PERF_RECORD_AUX_OUTPUT_HW_ID = 21,
+ /*
+ * This user callchain capture was deferred until shortly before
+ * returning to user space. Previous samples would have kernel
+ * callchains only and they need to be stitched with this to make full
+ * callchains.
+ *
+ * TODO: do PERF_SAMPLE_{REGS,STACK}_USER also need deferral?
+ *
+ * struct {
+ * struct perf_event_header header;
+ * u64 nr;
+ * u64 ips[nr];
+ * struct sample_id sample_id;
+ * };
+ */
+ PERF_RECORD_CALLCHAIN_DEFERRED = 22,
+
PERF_RECORD_MAX, /* non-ABI */
};
@@ -1247,6 +1265,7 @@ enum perf_callchain_context {
PERF_CONTEXT_HV = (__u64)-32,
PERF_CONTEXT_KERNEL = (__u64)-128,
PERF_CONTEXT_USER = (__u64)-512,
+ PERF_CONTEXT_USER_DEFERRED = (__u64)-640,
PERF_CONTEXT_GUEST = (__u64)-2048,
PERF_CONTEXT_GUEST_KERNEL = (__u64)-2176,
--
2.46.0.792.g87dc391469-goog
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