Messages in this thread Patch in this message | | | Date | Mon, 4 Nov 2013 16:51:48 -0800 | Subject | [PATCH] trace-cmd: Make read nonblocking in find_time_stamp(). | From | Aaron Fabbri <> |
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This only affects the tsc -> time of day correlation when doing `trace-cmd record --date`.
get_date_to_ts() writes a dummy event to trace_marker and then reads it back. Reading it back is done by looping over all per-cpu raw trace pipes and trying to read. This read should be non-blocking, because the dummy event can end up on any CPU.
Signed-off-by: Aaron Fabbri <ajfabbri@gmail.com> --- trace-record.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/trace-record.c b/trace-record.c index 1b1d293..dca8a92 100644 --- a/trace-record.c +++ b/trace-record.c @@ -2092,7 +2092,7 @@ static unsigned long long find_time_stamp(struct pevent *pevent) continue;
sprintf(file, "%s/%s/trace_pipe_raw", path, name); - fd = open(file, O_RDONLY); + fd = open(file, O_RDONLY | O_NONBLOCK); if (fd < 0) continue; do { -- 1.8.1.2
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