From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>, Thomas Gleixner <tglx@linutronix.de>
Cc: Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
Clark Williams <williams@redhat.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Adrian Hunter <adrian.hunter@intel.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Michael Petlan <mpetlan@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 06/17] perf evsel: Add comment for 'idx' member in 'struct perf_sample_id
Date: Tue, 20 Aug 2019 16:27:22 -0300 [thread overview]
Message-ID: <20190820192733.19180-7-acme@kernel.org> (raw)
In-Reply-To: <20190820192733.19180-1-acme@kernel.org>
From: Adrian Hunter <adrian.hunter@intel.com>
The 'idx' member was added as preparation for AUX area sampling. Add a
comment to describe why.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/83ff264f-84c3-5372-8976-dd9293d20c6f@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/evsel.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 9cd6e3ae479a..efe08065838f 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -23,6 +23,13 @@ struct perf_sample_id {
struct hlist_node node;
u64 id;
struct evsel *evsel;
+ /*
+ * 'idx' will be used for AUX area sampling. A sample will have AUX area
+ * data that will be queued for decoding, where there are separate
+ * queues for each CPU (per-cpu tracing) or task (per-thread tracing).
+ * The sample ID can be used to lookup 'idx' which is effectively the
+ * queue number.
+ */
int idx;
int cpu;
pid_t tid;
--
2.21.0
next prev parent reply other threads:[~2019-08-20 19:28 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-20 19:27 [GIT PULL] perf/core improvements and fixes Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 01/17] tools headers: Add limits.h to access __WORDSIZE Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 02/17] perf tools: tools/include should come before tools/uapi/include Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 03/17] tools headers: Grab copy of linux/const.h, needed by linux/bits.h Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 04/17] tools headers: Synchronize linux/bits.h with the kernel sources Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 05/17] tools arch x86: Sync asm/cpufeatures.h with the with the kernel Arnaldo Carvalho de Melo
2019-08-20 19:27 ` Arnaldo Carvalho de Melo [this message]
2019-08-20 19:27 ` [PATCH 07/17] tools lib traceevent: Fix "robust" test of do_generate_dynamic_list_file Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 08/17] perf record: Enable LBR callstack capture jointly with thread stack Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 09/17] perf report: Dump LBR callstack data by -D " Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 10/17] perf report: Prefer DWARF callstacks to LBR ones when captured both Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 11/17] perf cs-etm: Support sample flags 'insn' and 'insnlen' Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 12/17] perf ui: Make 'exit_msg' optional in ui__question_window() Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 13/17] perf ui: Introduce non-interactive ui__info_window() function Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 14/17] perf ui browser: Allow specifying message to show when no samples are available to display Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 15/17] perf top: Show info message while collecting samples Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 16/17] tools headers: Fixup bitsperlong per arch includes Arnaldo Carvalho de Melo
2019-08-20 19:27 ` [PATCH 17/17] libperf: Fix arch include paths Arnaldo Carvalho de Melo
2019-08-20 19:39 ` [GIT PULL] perf/core improvements and fixes Ingo Molnar
2019-08-20 19:44 ` Arnaldo Carvalho de Melo
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