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

[Adrian Hunter <adrian.hunter@intel.com>]

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
> 
>