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Date: Tue, 31 Mar 2015 14:38:29 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: Peter Zijlstra <peterz@...radead.org>,
Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Jiri Olsa <jolsa@...hat.com>,
Namhyung Kim <namhyung@...il.com>,
Stephane Eranian <eranian@...gle.com>
Subject: [PATCH V7 00/25] perf tools: Introduce an abstraction for AUX Area and Instruction Tracing
Hi
Here is V7 of some more preparatory patches for Intel PT
that introduce an abstraction for using the AUX area and
Instruction tracing.
The master branch of the tree:
git://git.infradead.org/users/ahunter/linux-perf.git
contains these patches and working Intel PT and Intel BTS.
Intel BTS can be used on most recent Intel CPUs. Intel PT
is available on Broadwell.
Examples:
Trace 'ls' with Intel BTS userspace only
perf record --per-thread -e intel_bts//u ls
perf report
perf script
Trace 'ls' with Intel BTS kernel and userspace
~/libexec/perf-core/perf-with-kcore record bts-ls --per-thread -e intel_bts// -- ls
~/libexec/perf-core/perf-with-kcore report bts-ls
~/libexec/perf-core/perf-with-kcore script bts-ls
Trace 'ls' with Intel PT userspace only
perf record -e intel_pt//u ls
perf report
perf script
Trace 'ls' with Intel PT kernel and userspace
~/libexec/perf-core/perf-with-kcore record pt-ls -e intel_pt// -- ls
~/libexec/perf-core/perf-with-kcore report pt-ls
~/libexec/perf-core/perf-with-kcore script pt-ls
Changes in V7:
Changes requested by Jiri:
perf evlist: Add initial support for mmapping an AUX area buffer
WARN_ONCE if mm->base is not NULL when mmapping
perf tools: Add support for AUX area recording
Use perf_can_sample_identifier() consistently
Drop unused function perf_event__synthesize_auxtrace()
perf record: Add basic AUX area tracing support
Check length before calling record__write a second time
perf record: Extend -m option for AUX area tracing mmap pages
Update change log with -m option change syntax
Changes in V6:
Renamed itrace to auxtrace to better reflect the use of the
AUX area. In some cases itrace was retained where it seemed
to relate exclusively to Instruction Tracing.
Print warnings for separate auxtrace error types
Re-based on Arnaldo's perf/core branch:
107eb964d8c04417e8bce9e9ec2ed61d9261aec6
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Changes in V5:
perf tools: Add a user event for Instruction Tracing errors
Print error count from stats->nr_events
perf session: Add hooks to allow transparent decoding of Instruction Tracing data
Don't count Instruction Tracing errors (using stats->nr_events instead)
perf itrace: Add helpers for Instruction Tracing errors
Don't count Instruction Tracing errors (using stats->nr_events instead)
perf itrace: Add option to synthesize events for transactions
New patch
perf script: Add field option 'flags' to print sample flags
New patch
Re-based on tip perf/core branch:
94ac003b665fc04f13a7ab3b2be896b9b9503451
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Changes in V4:
perf tools: Add build option NO_ITRACE to exclude Instruction Tracing
New patch
Re-based on Arnaldo's perf/core branch:
3dd417d4010c8e141b0f32121cdc8d82aa4a9c6a
perf tools: Remove some unused functions from color.c
Changes in V3:
perf tools: Add support for Instruction Trace recording
Added evsel as a parameter to itrace_record__init
perf record: Add basic Instruction Tracing support
Moved the call to itrace_record__init after parse
options so that evsel could be passed and the
selected events used to determine what kind of
Instruction Tracing to use e.g. Intel PT vs BTS
Re-based on Arnaldo's perf/core branch:
41e950c033b7df997d4b38653efe6554be9b96a7
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Changes in V2:
Dropped patches already applied.
Re-based on Arnaldo's perf/core branch:
a84808083688d82d7f1e5786ccf5df0ff7d448cb
perf tools: Only override the default :tid comm entry
The abstraction has two separate aspects:
1. recording AUX area data
2. processing AUX area data
Recording consists of mmapping a separate buffer and copying
the data into the perf.data file. The buffer is an AUX area
buffer although the details of the AUX area are not implemented
because the kernel support is pending. The data is written
preceded by a new user event PERF_RECORD_AUXTRACE. The data is
too big to fit in the event but follows immediately afterward.
Session processing has to skip to get to the next event header
in a similar fashion to the existing PERF_RECORD_HEADER_TRACING_DATA
event. The main recording patches are:
perf evlist: Add initial support for mmapping an AUX area buffer
perf tools: Add user events for AUX area tracing
perf tools: Add support for AUX area recording
perf record: Add basic AUX area tracing support
Processing consists of providing hooks in session processing
to enable a decoder to see all the events and deliver synthesized
events transparently into the event stream. The main processing
patch is:
perf session: Add hooks to allow transparent decoding of AUX area tracing data
Adrian Hunter (25):
perf header: Add AUX area tracing feature
perf evlist: Add initial support for mmapping an AUX area buffer
perf tools: Add user events for AUX area tracing
perf tools: Add support for AUX area recording
perf record: Add basic AUX area tracing support
perf record: Extend -m option for AUX area tracing mmap pages
perf tools: Add a user event for AUX area tracing errors
perf session: Add hooks to allow transparent decoding of AUX area tracing data
perf session: Add instruction tracing options
perf auxtrace: Add helpers for AUX area tracing errors
perf auxtrace: Add helpers for queuing AUX area tracing data
perf auxtrace: Add a heap for sorting AUX area tracing queues
perf auxtrace: Add processing for AUX area tracing events
perf auxtrace: Add a hashtable for caching
perf tools: Add member to struct dso for an instruction cache
perf script: Add Instruction Tracing support
perf script: Always allow fields 'addr' and 'cpu' for auxtrace
perf report: Add Instruction Tracing support
perf inject: Re-pipe AUX area tracing events
perf inject: Add Instruction Tracing support
perf tools: Add AUX area tracing index
perf tools: Hit all build ids when AUX area tracing
perf tools: Add build option NO_AUXTRACE to exclude AUX area tracing
perf auxtrace: Add option to synthesize events for transactions
perf script: Add field option 'flags' to print sample flags
tools/perf/Documentation/perf-inject.txt | 27 +
tools/perf/Documentation/perf-record.txt | 2 +
tools/perf/Documentation/perf-report.txt | 29 +
tools/perf/Documentation/perf-script.txt | 38 +-
tools/perf/Makefile.perf | 2 +
tools/perf/builtin-buildid-list.c | 9 +
tools/perf/builtin-inject.c | 172 +++-
tools/perf/builtin-record.c | 168 +++-
tools/perf/builtin-report.c | 11 +
tools/perf/builtin-script.c | 74 +-
tools/perf/config/Makefile | 5 +
tools/perf/perf.h | 2 +
tools/perf/tests/make | 2 +
tools/perf/util/Build | 1 +
tools/perf/util/auxtrace.c | 1278 ++++++++++++++++++++++++++++++
tools/perf/util/auxtrace.h | 571 +++++++++++++
tools/perf/util/dso.c | 2 +
tools/perf/util/dso.h | 3 +
tools/perf/util/event.c | 3 +
tools/perf/util/event.h | 46 ++
tools/perf/util/evlist.c | 71 +-
tools/perf/util/evlist.h | 6 +
tools/perf/util/header.c | 37 +
tools/perf/util/header.h | 1 +
tools/perf/util/record.c | 11 +-
tools/perf/util/session.c | 169 +++-
tools/perf/util/session.h | 6 +
tools/perf/util/tool.h | 10 +-
28 files changed, 2702 insertions(+), 54 deletions(-)
create mode 100644 tools/perf/util/auxtrace.c
create mode 100644 tools/perf/util/auxtrace.h
Regards
Adrian
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