linux-kernel - Re: [PATCH] perf jvmti: remove redundant jitdump line table entries

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Message-ID: <xgl9wo4ylyv5.fsf@arm.com>
Date:   Wed, 27 May 2020 13:40:14 +0800
From:   Nick Gasson <nick.gasson@....com>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Stephane Eranian <eranian@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf jvmti: remove redundant jitdump line table entries

On 05/27/20 13:03 PM, Ian Rogers wrote:
>
> Great result, thanks! I note there is a lack of symbolization when
> benchmarking a few Java applications. I'll try to see if there's a
> sensible resolution for those.
>

I noticed it loses information when the Hotspot code cache is
resized. I've been working around that by setting
-XX:InitialCodeCacheSize and -XX:ReservedCodeCacheSize to large
values. Does this help in your case?

>
> It'd be better to make this into two patches. Also on acme's perf/core
> branch if possible:
> https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/log/?h=perf/core

OK sure, I'll do that.

--
Nick