linux-kernel - [PATCH 02/14] perf trace: Apply new perf_mmap__read

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Message-Id: <1519945751-37786-2-git-send-email-kan.liang@linux.intel.com>
Date:   Thu,  1 Mar 2018 18:08:59 -0500
From:   kan.liang@...ux.intel.com
To:     acme@...nel.org, mingo@...hat.com, linux-kernel@...r.kernel.org
Cc:     jolsa@...hat.com, namhyung@...nel.org, wangnan0@...wei.com,
        ak@...ux.intel.com, Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH 02/14] perf trace: Apply new perf_mmap__read_event() interface

From: Kan Liang <kan.liang@...ux.intel.com>

The perf trace still use the legacy interface.

Apply the new perf_mmap__read_event() interface for perf trace.

No functional change.

Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
---
 tools/perf/builtin-trace.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index e7f1b18..a46644f 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2472,8 +2472,14 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 
 	for (i = 0; i < evlist->nr_mmaps; i++) {
 		union perf_event *event;
+		struct perf_mmap *md;
+		u64 end, start;
 
-		while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+		md = &evlist->mmap[i];
+		if (perf_mmap__read_init(md, 0, &start, &end) < 0)
+			continue;
+
+		while ((event = perf_mmap__read_event(md, 0, &start, end)) != NULL) {
 			struct perf_sample sample;
 
 			++trace->nr_events;
@@ -2486,7 +2492,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 
 			trace__handle_event(trace, event, &sample);
 next_event:
-			perf_evlist__mmap_consume(evlist, i);
+			perf_mmap__consume(md, 0);
 
 			if (interrupted)
 				goto out_disable;
@@ -2496,6 +2502,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 				draining = true;
 			}
 		}
+		perf_mmap__read_done(md);
 	}
 
 	if (trace->nr_events == before) {
-- 
2.4.11