linux-kernel - Re: [PATCH v5 0/7] perf/sdt: Directly record SDT events with 'perf record'

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Date:   Thu, 16 Mar 2017 16:57:52 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     mingo@...hat.com, acme@...nel.org, brendan.d.gregg@...il.com,
        peterz@...radead.org, alexander.shishkin@...ux.intel.com,
        wangnan0@...wei.com, jolsa@...nel.org, ak@...ux.intel.com,
        treeze.taeung@...il.com, mathieu.poirier@...aro.org,
        hekuang@...wei.com, sukadev@...ux.vnet.ibm.com, ananth@...ibm.com,
        naveen.n.rao@...ux.vnet.ibm.com, adrian.hunter@...el.com,
        linux-kernel@...r.kernel.org, hemant@...ux.vnet.ibm.com,
        Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Subject: Re: [PATCH v5 0/7] perf/sdt: Directly record SDT events with 'perf
 record'

Hi Masami,

On Thursday 16 March 2017 03:21 PM, Masami Hiramatsu wrote:
> On Tue, 14 Mar 2017 20:36:51 +0530
> Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com> wrote:
>
>> Changes in v5:
>>   - Patch 2/7 is new. New option introduced in this patch helps to pass
>>     custome data from builtin-*.c to libperf.
>>
>>   - All direct callbacks from libelf to builtin-record.c is removed.
>>  

Minor correction.. s/libelf/libperf/

>>   - Merged 2nd and 4th patch of v4 into patch 2 of v5.

s/patch 2 of v5/patch 3 of v5/

>>
>>   - Moved all functions from util/probe-file.c to util/probe-event.c
>>     which operates on perf_probe_event.
>>
>>   - Made free_sdt_list() static as it's only used inside util/probe-event.c.
>>
>>   - Couple of other changes as Masami has suggested in v4 review.
> Hi Ravi,
> Could you also describe which patches are updated? It seems 1/7 is not
> modified, correct?

Let me list a patch-wise brief changelog.

patch 1/7:- Introduced dummy version of is_sdt_event() which always return false
             if !HAVE_LIBELF_SUPPORT.

patch 2/7: - is new. A new option introduced in this patch helps to passcustom
             data from builtin-*.c to libperf.

patch 3/7: - Removed direct calls from libperf to builtin-record.c which was used
             to prepare record.sdt_event_list. Instead pass list to libperf and let
             libperf manage it.

           - Introduce new wrapper func record__parse_events_option() that can
             differentiate between sdt and other events while parsing them in
             perf record.

           - Moved all functions from util/probe-file.c to util/probe-event.c
             which operates on perf_probe_event.

           - Merged 2nd and 4th patch of v4 into this patch.

           - Made free_sdt_list() static as it's only used inside util/probe-event.c.

patch 4/7:- Removed direct calls from libperf to builtin-record.c which was used
             to prepare record.sdt_event_list. Instead pass list to libperf and let
             libperf manage it.

           - Moved all functions from util/probe-file.c to util/probe-event.c
             which operates on perf_probe_event.

patch 5/7: No changes

patch 6/7: No changes

patch 7/7: No changes

Let me know if you need more details.

Thanks,
Ravi