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

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Date:   Fri, 17 Mar 2017 13:42:14 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
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
Subject: Re: [PATCH v5 0/7] perf/sdt: Directly record SDT events with 'perf
 record'

Hi Ravi,

On Thu, 16 Mar 2017 16:57:52 +0530
Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com> wrote:

> 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! that's very helpful for me to review it.


-- 
Masami Hiramatsu <mhiramat@...nel.org>