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perf session: Add reader__process_events function

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The reader object is defined by file's fd, data offset and data size.

Now we can simply define a reader object for an arbitrary file data
portion and pass it to reader__process_events().

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/20190110101301.6196-7-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2019-01-10 11:13:01 +01:00 committed by Arnaldo Carvalho de Melo
parent 71002bd214
commit 3c7b67b23e
1 changed files with 38 additions and 24 deletions
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62
tools/perf/util/session.c
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@ -1826,36 +1826,25 @@ struct reader {
u64 data_offset;
};
static int __perf_session__process_events(struct perf_session *session)
static int
reader__process_events(struct reader *rd, struct perf_session *session,
struct ui_progress *prog)
{
struct reader rd = {
.fd = perf_data__fd(session->data),
.data_size = session->header.data_size,
.data_offset = session->header.data_offset,
};
struct ordered_events *oe = &session->ordered_events;
struct perf_tool *tool = session->tool;
u64 data_size = rd.data_size;
u64 data_size = rd->data_size;
u64 head, page_offset, file_offset, file_pos, size;
int err, mmap_prot, mmap_flags, map_idx = 0;
int err = 0, mmap_prot, mmap_flags, map_idx = 0;
size_t mmap_size;
char *buf, *mmaps[NUM_MMAPS];
union perf_event *event;
struct ui_progress prog;
s64 skip;
perf_tool__fill_defaults(tool);
page_offset = page_size * (rd.data_offset / page_size);
page_offset = page_size * (rd->data_offset / page_size);
file_offset = page_offset;
head = rd.data_offset - page_offset;
head = rd->data_offset - page_offset;
if (data_size == 0)
goto out;
ui_progress__init_size(prog, data_size, "Processing events...");
ui_progress__init_size(&prog, data_size, "Processing events...");
data_size += rd.data_offset;
data_size += rd->data_offset;
mmap_size = MMAP_SIZE;
if (mmap_size > data_size) {
@ -1873,12 +1862,12 @@ static int __perf_session__process_events(struct perf_session *session)
mmap_flags = MAP_PRIVATE;
}
remap:
buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd.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");
err = -errno;
goto out_err;
goto out;
}
mmaps[map_idx] = buf;
map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
@ -1910,7 +1899,7 @@ more:
file_offset + head, event->header.size,
event->header.type);
err = -EINVAL;
goto out_err;
goto out;
}
if (skip)
@ -1919,7 +1908,7 @@ more:
head += size;
file_pos += size;
ui_progress__update(&prog, size);
ui_progress__update(prog, size);
if (session_done())
goto out;
@ -1928,6 +1917,31 @@ more:
goto more;
out:
return err;
}
static int __perf_session__process_events(struct perf_session *session)
{
struct reader rd = {
.fd = perf_data__fd(session->data),
.data_size = session->header.data_size,
.data_offset = session->header.data_offset,
};
struct ordered_events *oe = &session->ordered_events;
struct perf_tool *tool = session->tool;
struct ui_progress prog;
int err;
perf_tool__fill_defaults(tool);
if (rd.data_size == 0)
return -1;
ui_progress__init_size(&prog, rd.data_size, "Processing events...");
err = reader__process_events(&rd, session, &prog);
if (err)
goto out_err;
/* do the final flush for ordered samples */
err = ordered_events__flush(oe, OE_FLUSH__FINAL);
if (err)