Re: [PATCH 1/1] Perf: fix overwritten of free running PEBSv3 timestamp

From: Peter Zijlstra
Date: Thu Feb 11 2016 - 12:26:46 EST


On Thu, Feb 11, 2016 at 11:39:18AM -0500, Tong Zhang wrote:
> How about moving `time' to the `group', Will this help?

Somewhat, but the patch is still really horrid. It makes t==0 a special
case and seems to scatter this all over the place.

It also consumes the last word in that cacheline :/

There's a few other options, but so far I'm not really liking any of
them very much either :/