Re: [PATCH V4 00/23] perf tools: Introduce an abstraction for Instruction Tracing

From: Adrian Hunter
Date: Tue Feb 10 2015 - 07:33:54 EST

On 08/01/15 14:52, Adrian Hunter wrote:
> Hi
>
> Here is V4 of some more preparatory patches for Intel PT
> that introduce an abstraction for Instruction tracing.
>
> The master branch of the tree:
>
> git://git.infradead.org/users/ahunter/linux-perf.git
>
> contains these patches plus Intel PT and BTS and the kernel driver.
>

Arnaldo, I was thinking of sending V5 (re-based plus a couple of small
changes) but there seem to be a number of large patch sets pending and I
also have the main Intel PT patches (25 patches), so I was wondering if you
have preferred order for handling them all?

AFAICT Peter has accepted the Intel PT kernel driver but I don't know if it
will be in 3.20.


> 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 Instruction Trace data
> 2. processing Instruction Trace 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_ITRACE. 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 Instruction Trace buffer
> perf tools: Add user events for Instruction Tracing
> perf tools: Add support for Instruction Trace recording
> perf record: Add basic Instruction Tracing support
>
> Processing consists of providing hooks in session processing
> to enable an Instruction Trace 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 Instruction Tracing data
>
>
> Adrian Hunter (23):
> perf header: Add Instruction Tracing feature
> perf evlist: Add initial support for mmapping an Instruction Trace buffer
> perf tools: Add user events for Instruction Tracing
> perf tools: Add support for Instruction Trace recording
> perf record: Add basic Instruction Tracing support
> perf record: Extend -m option for Instruction Tracing mmap pages
> perf tools: Add a user event for Instruction Tracing errors
> perf session: Add hooks to allow transparent decoding of Instruction Tracing data
> perf session: Add Instruction Tracing options
> perf itrace: Add helpers for Instruction Tracing errors
> perf itrace: Add helpers for queuing Instruction Tracing data
> perf itrace: Add a heap for sorting Instruction Tracing queues
> perf itrace: Add processing for Instruction Tracing events
> perf itrace: Add a hashtable for caching decoded instructions
> 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 itrace
> perf report: Add Instruction Tracing support
> perf inject: Re-pipe Instruction Tracing events
> perf inject: Add Instruction Tracing support
> perf tools: Add Instruction Tracing index
> perf tools: Hit all build ids when Instruction Tracing
> perf tools: Add build option NO_ITRACE to exclude Instruction Tracing
>
> tools/perf/Documentation/perf-inject.txt | 27 +
> tools/perf/Documentation/perf-record.txt | 2 +
> tools/perf/Documentation/perf-report.txt | 28 +
> tools/perf/Documentation/perf-script.txt | 28 +
> tools/perf/Makefile.perf | 6 +
> tools/perf/builtin-buildid-list.c | 9 +
> tools/perf/builtin-inject.c | 172 +++-
> tools/perf/builtin-record.c | 186 ++++-
> tools/perf/builtin-report.c | 12 +
> tools/perf/builtin-script.c | 39 +-
> tools/perf/config/Makefile | 4 +
> tools/perf/perf.h | 2 +
> tools/perf/tests/make | 2 +
> tools/perf/util/dso.c | 2 +
> tools/perf/util/dso.h | 3 +
> tools/perf/util/event.c | 3 +
> tools/perf/util/event.h | 38 +
> tools/perf/util/evlist.c | 70 +-
> tools/perf/util/evlist.h | 6 +
> tools/perf/util/header.c | 36 +
> tools/perf/util/header.h | 1 +
> tools/perf/util/itrace.c | 1258 ++++++++++++++++++++++++++++++
> tools/perf/util/itrace.h | 561 +++++++++++++
> tools/perf/util/record.c | 11 +-
> tools/perf/util/session.c | 148 +++-
> tools/perf/util/session.h | 6 +
> tools/perf/util/tool.h | 10 +-
> 27 files changed, 2624 insertions(+), 46 deletions(-)
> create mode 100644 tools/perf/util/itrace.c
> create mode 100644 tools/perf/util/itrace.h
>
>
> Regards
> Adrian
>
>

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