On Tue, 2 Apr 2019, Cyrill Gorcunov wrote: > On Tue, Apr 02, 2019 at 03:03:02PM +0200, Peter Zijlstra wrote: > > I have vague memories of the P4 thing crashing with Vince's perf_fuzzer, > > but maybe I'm wrong. > > No, you're correct. p4 was crashing many times before we manage to make > it more-less stable. The main problem though that to find working p4 box > is really a problem.
I do have some a functioning p4 system I can test on. I can easily run the fuzzer and report crashes, but I only have limited time/skills to actually fix the problems it turns up. One nice thing is that as of Linux 5.0 *finally* the fuzzer can run indefinitely on most modern Intel chips without crashing (still triggers a few warnings). So finally we have the ability to tell when a new crash is a regression and potentially can bisect it. Although obviously this doesn't necessarily apply to the p4. I do think the number of people trying to run perf on a p4 is probably pretty small these days. Vince
