lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 17 Jul 2014 10:09:43 -0300 From: Arnaldo Carvalho de Melo <acme@...nel.org> To: Peter Zijlstra <peterz@...radead.org> Cc: Namhyung Kim <namhyung@...nel.org>, Ingo Molnar <mingo@...nel.org>, Paul Mackerras <paulus@...ba.org>, Namhyung Kim <namhyung.kim@....com>, LKML <linux-kernel@...r.kernel.org>, Jiri Olsa <jolsa@...hat.com>, Minchan Kim <minchan@...nel.org> Subject: Re: [PATCH] perf stat: Pass PERF_STAT_RUN environment variable for each run Em Thu, Jul 17, 2014 at 10:40:11AM +0200, Peter Zijlstra escreveu: > On Thu, Jul 17, 2014 at 05:31:14PM +0900, Namhyung Kim wrote: > > On Thu, Jul 17, 2014 at 5:26 PM, Peter Zijlstra <peterz@...radead.org> wrote: > > > On Thu, Jul 17, 2014 at 05:21:06PM +0900, Namhyung Kim wrote: > > >> When perf stat runs multiple times via -r option, it's sometimes > > >> useful for a workload to know which run it executing. So pass new > > >> PERF_STAT_RUN environment variable to the workload for each run > > >> (starting from 1). > > > This seems counter intuitive, runs should be _identical_ otherwise > > > there's no point. That means the workload should very much _not_ know > > > these things. > > But I think it can be useful if a workload wants to save logfiles > > based on the iteration number for example. If it doesn't want, it can > > just ignore. :) > That's the wrong way around. Also, there's --pre and --post hooks to > preserve logfiles if you really have to do that kind of thing. Agreed, one can script this using --pre or --post if needed. - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists