linux-kernel - Re: [PATCH RFC] hist lookups

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Message-Id: <20181105.145227.1208804116999835276.davem@davemloft.net>
Date:   Mon, 05 Nov 2018 14:52:27 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     jolsa@...hat.com
Cc:     acme@...nel.org, linux-kernel@...r.kernel.org, namhyung@...nel.org,
        jolsa@...nel.org
Subject: Re: [PATCH RFC] hist lookups

From: Jiri Olsa <jolsa@...hat.com>
Date: Mon, 5 Nov 2018 21:34:47 +0100

> I put something together.. still testing, but it's already
> showing 0 lost events when for 'overwrite = 0' case even
> for high load.. the old code shows ~1500 for same workload
> 
> I'm printing lost event counts in stdio output header:
> 
>   # perf top -d 1 --stdio
>      PerfTop:    5734 irqs/sec  kernel:57.3%  exact: 100.0% lost: 0 [4000Hz cycles:ppp],  (all, 8 CPUs)
> 
> will probably add it to tui as well, seems useful
> 
> I pushed it in perf/fixes branch in:
>   git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
> 
> it's stil work in prograss.. not too manye complete changelogs ;-)

Looks interesting!

I'll play with this on sparc64 later, thanks!