From: Jiri Olsa <jolsa@redhat.com>
To: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Namhyung Kim <namhyung@kernel.org>,
Andi Kleen <ak@linux.intel.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v7 2/2]: perf record: enable asynchronous trace writing
Date: Thu, 6 Sep 2018 13:04:18 +0200 [thread overview]
Message-ID: <20180906110418.GG8248@krava> (raw)
In-Reply-To: <dc18a621-4464-e5a5-ce10-5f7b2f6a9176@linux.intel.com>
On Wed, Sep 05, 2018 at 10:39:25AM +0300, Alexey Budankov wrote:
SNIP
> diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
> index 384d17cd1379..1d57d8387caf 100644
> --- a/tools/perf/util/mmap.c
> +++ b/tools/perf/util/mmap.c
> @@ -332,12 +332,12 @@ int perf_mmap__read_init(struct perf_mmap *map)
> return __perf_mmap__read_init(map);
> }
>
> -int perf_mmap__push(struct perf_mmap *md, void *to,
> - int push(void *to, void *buf, size_t size))
> +int perf_mmap__push(struct perf_mmap *md, void *to, int idx,
> + int push(void *to, struct aiocb *cblock, void *data, size_t size))
> {
> u64 head = perf_mmap__read_head(md);
> unsigned char *data = md->base + page_size;
> - unsigned long size;
> + unsigned long size, size0 = 0;
> void *buf;
> int rc = 0;
>
> @@ -345,31 +345,58 @@ int perf_mmap__push(struct perf_mmap *md, void *to,
> if (rc < 0)
> return (rc == -EAGAIN) ? 0 : -1;
>
> + /* md->base data is copied into md->data[idx] buffer to
> + * release space in the kernel buffer as fast as possible,
please start the comment with the extra '/*', like:
/*
* md->base data is copied into md->data[idx] buffer to
* release space in the kernel buffer as fast as possible,
...
jirka
next prev parent reply other threads:[~2018-09-06 11:04 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-05 7:16 [PATCH v7 0/2]: perf: reduce data loss when profiling highly parallel CPU bound workloads Alexey Budankov
2018-09-05 7:19 ` [PATCH v7 1/2]: perf util: map data buffer for preserving collected data Alexey Budankov
2018-09-06 11:04 ` Jiri Olsa
2018-09-06 11:50 ` Alexey Budankov
2018-09-06 11:04 ` Jiri Olsa
2018-09-06 11:54 ` Alexey Budankov
2018-09-05 7:39 ` [PATCH v7 2/2]: perf record: enable asynchronous trace writing Alexey Budankov
2018-09-06 11:04 ` Jiri Olsa
2018-09-06 11:57 ` Alexey Budankov
2018-09-06 11:04 ` Jiri Olsa
2018-09-06 11:58 ` Alexey Budankov
2018-09-06 11:04 ` Jiri Olsa [this message]
2018-09-06 11:59 ` Alexey Budankov
2018-09-06 11:04 ` Jiri Olsa
2018-09-06 12:09 ` Alexey Budankov
2018-09-05 11:28 ` [PATCH v7 0/2]: perf: reduce data loss when profiling highly parallel CPU bound workloads Jiri Olsa
2018-09-05 17:37 ` Alexey Budankov
2018-09-05 18:51 ` Arnaldo Carvalho de Melo
2018-09-06 6:03 ` Alexey Budankov
2018-09-06 8:14 ` Jiri Olsa
2018-09-06 8:20 ` Alexey Budankov
2018-09-06 6:59 ` Alexey Budankov
2018-09-06 6:57 ` Alexey Budankov
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