[PATCH v15 08/12] perf tools: Drop evlist->backward

Wang Nan
2016-07-12T10:01:16Z

We are going to use evlist->backward_mmap as a container for backward
ring buffer. Since a evlist can hold normal and backward ring buffers
together, evlist->backward is useless and misleading. Drop this
indicator.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: Nilay Vaish <nilayvaish@gmail.com>
Cc: pi3orama@163.com
---
tools/perf/builtin-record.c | 11 +++++------
tools/perf/tests/backward-ring-buffer.c | 1 -
tools/perf/util/evlist.c | 5 +----
tools/perf/util/evlist.h | 1 -
4 files changed, 6 insertions(+), 12 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index b2b3b60..f89a4a6 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -119,11 +119,10 @@ backward_rb_find_range(void *buf, int mask, u64 head, u64 *start, u64 *end)
}

static int
-rb_find_range(struct perf_evlist *evlist,
- void *data, int mask, u64 head, u64 old,
- u64 *start, u64 *end)
+rb_find_range(void *data, int mask, u64 head, u64 old,
+ u64 *start, u64 *end, bool backward)
{
- if (!evlist->backward) {
+ if (!backward) {
*start = old;
*end = head;
return 0;
@@ -143,8 +142,8 @@ static int record__mmap_read(struct record *rec, struct perf_evlist *evlist, int
void *buf;
int rc = 0;

- if (rb_find_range(evlist, data, md->mask, head,
- old, &start, &end))
+ if (rb_find_range(data, md->mask, head,
+ old, &start, &end, false))
return -1;

if (start == end)
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index 3558db7..e18fd03 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -101,7 +101,6 @@ int test__backward_ring_buffer(int subtest __maybe_unused)
return TEST_FAIL;
}

- evlist->backward = true;
err = perf_evlist__create_maps(evlist, &opts.target);
if (err < 0) {
pr_debug("Not enough memory to create thread/cpu maps\n");
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 6741ced..6fb693c 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -44,7 +44,6 @@ void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
perf_evlist__set_maps(evlist, cpus, threads);
fdarray__init(&evlist->pollfd, 64);
evlist->workload.pid = -1;
- evlist->backward = false;
}

struct perf_evlist *perf_evlist__new(void)
@@ -853,9 +852,7 @@ union perf_event *perf_evlist__mmap_read_backward(struct perf_evlist *evlist, in

union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx)
{
- if (!evlist->backward)
- return perf_evlist__mmap_read_forward(evlist, idx);
- return perf_evlist__mmap_read_backward(evlist, idx);
+ return perf_evlist__mmap_read_forward(evlist, idx);
}

void perf_mmap__read_catchup(struct perf_mmap *md)
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 8acac5f..72b9ff7 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -50,7 +50,6 @@ struct perf_evlist {
bool overwrite;
bool enabled;
bool has_user_cpus;
- bool backward;
size_t mmap_len;
int id_pos;
int is_pos;
--
1.8.3.4