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From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>, Ingo Molnar <mingo@kernel.org>,
	linux-kernel@vger.kernel.org, namhyung@kernel.org,
	wangnan0@huawei.com, ak@linux.intel.com
Subject: Re: [PATCH 02/14] perf trace: Apply new perf_mmap__read_event() interface
Date: Mon, 5 Mar 2018 12:04:09 -0300	[thread overview]
Message-ID: <20180305150409.GA22849@kernel.org> (raw)
In-Reply-To: <44636157-9aaf-4e50-c12a-a2e60e01e415@linux.intel.com>

Em Mon, Mar 05, 2018 at 09:50:10AM -0500, Liang, Kan escreveu:
> 
> 
> On 3/5/2018 8:46 AM, Arnaldo Carvalho de Melo wrote:
> > Em Mon, Mar 05, 2018 at 10:03:39AM -0300, Arnaldo Carvalho de Melo escreveu:
> > > I'm doing this, the argument is 'bool', so the value should be false or
> > > true, even '0' being way shorter...

> > While doing that I wonder why is that we can't do it without those
> > explicit start/end variables in all the call sites and passing
> > overwrite, start and end as parameters...

> > Can't we just add 'overwrite, 'start' and 'end' to struct perf_mmap,
> > then have perf_mmap__read_init() with just 'md' and 'overwrite' as
> > parameters, initialize md->{start,end} and set md->overwrite to the
> > 'overwrite' parameter in 'perf_mmap__read_init()' and then use just
> > md as parameters for both perf_mmap__read_event() and
> > perf_mmap__consume()?
 
> I don't see any reason we cannot do this.
> I will do some test. If it works well, I will submit the follow-up patch to
> clean up the interface.

Thanks a lot! The less boilerplate we have in such functions, making
them easier to use for new people contributing to tools/perf/, the
better.

- Arnaldo

  reply	other threads:[~2018-03-05 15:04 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-01 23:08 [PATCH 01/14] perf kvm: Apply new perf_mmap__read_event() interface kan.liang
2018-03-01 23:08 ` [PATCH 02/14] perf trace: " kan.liang
2018-03-02 23:30   ` Jiri Olsa
2018-03-05 14:28     ` Liang, Kan
2018-03-02 23:30   ` Jiri Olsa
2018-03-05 13:03     ` Arnaldo Carvalho de Melo
2018-03-05 13:46       ` Arnaldo Carvalho de Melo
2018-03-05 14:50         ` Liang, Kan
2018-03-05 15:04           ` Arnaldo Carvalho de Melo [this message]
2018-03-06  6:47   ` [tip:perf/core] perf trace: Switch to " tip-bot for Kan Liang
2018-03-01 23:09 ` [PATCH 03/14] perf python: Apply " kan.liang
2018-03-06  6:47   ` [tip:perf/core] perf python: Switch to " tip-bot for Kan Liang
2018-03-01 23:09 ` [PATCH 04/14] perf test: Apply new perf_mmap__read_event() interface for bpf kan.liang
2018-03-06  6:48   ` [tip:perf/core] perf test: Switch to " tip-bot for Kan Liang
2018-03-01 23:09 ` [PATCH 05/14] perf test: Apply new perf_mmap__read_event() interface for code reading kan.liang
2018-03-06  6:48   ` [tip:perf/core] perf test: Switch to new perf_mmap__read_event() interface for 'code reading' test tip-bot for Kan Liang
2018-03-01 23:09 ` [PATCH 06/14] perf test: Apply new perf_mmap__read_event() interface for keep_tracking kan.liang
2018-03-06  6:49   ` [tip:perf/core] perf test: Switch to new perf_mmap__read_event() interface for "keep tracking" test tip-bot for Kan Liang
2018-03-01 23:09 ` [PATCH 07/14] perf test: Apply new perf_mmap__read_event() interface for mmap-basic kan.liang
2018-03-06  6:49   ` [tip:perf/core] perf test: Switch to " tip-bot for Kan Liang
2018-03-01 23:09 ` [PATCH 08/14] perf test: Apply new perf_mmap__read_event() interface for tp fields kan.liang
2018-03-06  6:50   ` [tip:perf/core] perf test: Switch to " tip-bot for Kan Liang
2018-03-01 23:09 ` [PATCH 09/14] perf test: Apply new perf_mmap__read_event() interface for perf-record kan.liang
2018-03-06  6:50   ` [tip:perf/core] perf test: Switch to " tip-bot for Kan Liang
2018-03-01 23:09 ` [PATCH 10/14] perf test: Apply new perf_mmap__read_event() interface for time-to-tsc kan.liang
2018-03-06  6:51   ` [tip:perf/core] perf test: Switch to " tip-bot for Kan Liang
2018-03-01 23:09 ` [PATCH 11/14] perf test: Apply new perf_mmap__read_event() interface for sw-clock kan.liang
2018-03-06  6:51   ` [tip:perf/core] perf test: Switch to " tip-bot for Kan Liang
2018-03-01 23:09 ` [PATCH 12/14] perf test: Apply new perf_mmap__read_event() interface for switch-tracking kan.liang
2018-03-06  6:52   ` [tip:perf/core] perf test: Switch to " tip-bot for Kan Liang
2018-03-01 23:09 ` [PATCH 13/14] perf test: Apply new perf_mmap__read_event() interface for task-exit kan.liang
2018-03-06  6:52   ` [tip:perf/core] perf test: Switch to " tip-bot for Kan Liang
2018-03-01 23:09 ` [PATCH 14/14] perf tools: Discard legacy interfaces for mmap read forward kan.liang
2018-03-06  6:52   ` [tip:perf/core] perf mmap: " tip-bot for Kan Liang
2018-03-06  6:47 ` [tip:perf/core] perf kvm: Switch to new perf_mmap__read_event() interface tip-bot for Kan Liang

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