Re: Q: perf log mode?

[Frederic Weisbecker]

On Wed, Jan 12, 2011 at 03:08:08PM +0100, Peter Zijlstra wrote:
> On Wed, 2011-01-12 at 17:06 +0300, Kirill Smelkov wrote:
> > I'm trying to use perf together with e.g. kprobes as a tool to show what
> > is happening with my system in "live-log" mode. The problem is, for
> > seldom events, actual info output is largely delayed because perf reads
> > sample data in whole pages. Could something be done with it or am I'm
> > missing something? Here is detailed description: 
> 
> perf_event_attr = {
> 	.watermark = 0,
> 	.wakeup_events = 1,
> };


Which is perhaps something we want as a default when perf record -c 1
and the output is the pipe mode.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/