From: kan.liang@linux.intel.com
To: acme@kernel.org, mingo@redhat.com, linux-kernel@vger.kernel.org
Cc: jolsa@redhat.com, namhyung@kernel.org, wangnan0@huawei.com,
ak@linux.intel.com, Kan Liang <kan.liang@linux.intel.com>
Subject: [PATCH V2 1/8] perf evlist: Store 'overwrite' in struct perf_mmap
Date: Tue, 6 Mar 2018 10:36:00 -0500 [thread overview]
Message-ID: <1520350567-80082-1-git-send-email-kan.liang@linux.intel.com> (raw)
From: Kan Liang <kan.liang@linux.intel.com>
It has been determined that the map is for overwrite mode
(evlist->overwrite_mmap) or non-overwrite mode (evlist->mmap) when
calling perf_evlist__alloc_mmap().
Store the information in struct perf_mmap, which will be used later to
simpler the perf_mmap__read*() interfaces.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
Changes since V1:
- New patch to store 'overwrite' in struct perf_mmap at allocation
tools/perf/util/evlist.c | 8 +++++---
tools/perf/util/mmap.h | 1 +
2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 41a4666..a59281d 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -722,7 +722,8 @@ void perf_evlist__munmap(struct perf_evlist *evlist)
zfree(&evlist->overwrite_mmap);
}
-static struct perf_mmap *perf_evlist__alloc_mmap(struct perf_evlist *evlist)
+static struct perf_mmap *perf_evlist__alloc_mmap(struct perf_evlist *evlist,
+ bool overwrite)
{
int i;
struct perf_mmap *map;
@@ -736,6 +737,7 @@ static struct perf_mmap *perf_evlist__alloc_mmap(struct perf_evlist *evlist)
for (i = 0; i < evlist->nr_mmaps; i++) {
map[i].fd = -1;
+ map[i].overwrite = overwrite;
/*
* When the perf_mmap() call is made we grab one refcount, plus
* one extra to let perf_mmap__consume() get the last
@@ -779,7 +781,7 @@ static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx,
maps = evlist->overwrite_mmap;
if (!maps) {
- maps = perf_evlist__alloc_mmap(evlist);
+ maps = perf_evlist__alloc_mmap(evlist, true);
if (!maps)
return -1;
evlist->overwrite_mmap = maps;
@@ -1029,7 +1031,7 @@ int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages,
struct mmap_params mp;
if (!evlist->mmap)
- evlist->mmap = perf_evlist__alloc_mmap(evlist);
+ evlist->mmap = perf_evlist__alloc_mmap(evlist, false);
if (!evlist->mmap)
return -ENOMEM;
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index ec7d3a24..7113797 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -20,6 +20,7 @@ struct perf_mmap {
int fd;
refcount_t refcnt;
u64 prev;
+ bool overwrite;
struct auxtrace_mmap auxtrace_mmap;
char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
};
--
2.4.11
next reply other threads:[~2018-03-06 15:37 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-06 15:36 kan.liang [this message]
2018-03-06 15:36 ` [PATCH V2 2/8] perf mmap: Store mmap scope in struct perf_mmap kan.liang
2018-03-09 8:44 ` [tip:perf/core] perf mmap: Store mmap scope in struct perf_mmap() tip-bot for Kan Liang
2018-03-06 15:36 ` [PATCH V2 3/8] perf mmap: Using the stored scope data in perf_mmap__push kan.liang
2018-03-09 8:44 ` [tip:perf/core] perf mmap: Use the stored scope data in perf_mmap__push() tip-bot for Kan Liang
2018-03-06 15:36 ` [PATCH V2 4/8] perf mmap: Using the stored data in perf_mmap__read_event kan.liang
2018-03-09 8:45 ` [tip:perf/core] perf mmap: Use the stored data in perf_mmap__read_event() tip-bot for Kan Liang
2018-03-06 15:36 ` [PATCH V2 5/8] perf mmap: Using stored 'overwrite' in perf_mmap__consume kan.liang
2018-03-09 8:45 ` [tip:perf/core] perf mmap: Use stored 'overwrite' in perf_mmap__consume() tip-bot for Kan Liang
2018-03-06 15:36 ` [PATCH V2 6/8] perf tools: Refine perf_mmap__consume kan.liang
2018-03-09 8:46 ` [tip:perf/core] perf mmap: Simplify perf_mmap__consume() tip-bot for Kan Liang
2018-03-06 15:36 ` [PATCH V2 7/8] perf tools: Refine perf_mmap__read_event kan.liang
2018-03-09 8:46 ` [tip:perf/core] perf mmap: Simplify perf_mmap__read_event() tip-bot for Kan Liang
2018-03-06 15:36 ` [PATCH V2 8/8] perf tools: Refine perf_mmap__read_init kan.liang
2018-03-09 8:46 ` [tip:perf/core] perf mmap: Simplify perf_mmap__read_init() tip-bot for Kan Liang
2018-03-07 10:12 ` [PATCH V2 1/8] perf evlist: Store 'overwrite' in struct perf_mmap Jiri Olsa
2018-03-09 8:43 ` [tip:perf/core] " tip-bot for Kan Liang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1520350567-80082-1-git-send-email-kan.liang@linux.intel.com \
--to=kan.liang@linux.intel.com \
--cc=acme@kernel.org \
--cc=ak@linux.intel.com \
--cc=jolsa@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=namhyung@kernel.org \
--cc=wangnan0@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).