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perf session: Add reader object

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Add a session private reader object to encapsulate the reading of the
event data block. Starting with a 'fd' field.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190110101301.6196-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2019-01-10 11:12:58 +01:00 committed by Arnaldo Carvalho de Melo
parent 4f5a473d79
commit 82715eb184
1 changed files with 8 additions and 2 deletions
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10
tools/perf/util/session.c
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@ -1820,11 +1820,17 @@ fetch_mmaped_event(struct perf_session *session,
#define NUM_MMAPS 128
#endif
struct reader {
int fd;
};
static int __perf_session__process_events(struct perf_session *session)
{
struct reader rd = {
.fd = perf_data__fd(session->data),
};
struct ordered_events *oe = &session->ordered_events;
struct perf_tool *tool = session->tool;
int fd = perf_data__fd(session->data);
u64 data_offset = session->header.data_offset;
u64 data_size = session->header.data_size;
u64 head, page_offset, file_offset, file_pos, size;
@ -1864,7 +1870,7 @@ static int __perf_session__process_events(struct perf_session *session)
mmap_flags = MAP_PRIVATE;
}
remap:
buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd.fd,
file_offset);
if (buf == MAP_FAILED) {
pr_err("failed to mmap file\n");