From: Yichao Yu <yyc1992@gmail.com>
To: Fredrik Tolf <fredrik@dolda2000.com>
Cc: Duane Ellis <duane@duaneellis.com>, gdb@sourceware.org
Subject: Re: Bad performance in updating JIT debug symbols
Date: Sun, 18 Sep 2016 13:55:00 -0000 [thread overview]
Message-ID: <CAMvDr+QiB6kq=0HWZo++nCiYfPEnvbAPeNjjxikc1iaKdZEUrA@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.11.1609172042100.2866@shack.dolda2000.com>
On Sat, Sep 17, 2016 at 2:43 PM, Fredrik Tolf <fredrik@dolda2000.com> wrote:
> On Sat, 17 Sep 2016, Duane Ellis wrote:
>>
>> So why not make a wrapper on the symbol lookup function
>>
>> Search the main list if that fails to find try the next list of syms.
>>
>> After you under 100 inserts resort your additional list. And start a new
>> list
>
>
> I can imagine a lot of ways to optimize the current code, but the main point
> was that GDB seems to be stuck in a path of the code that is not really
> intended to be used other than when GDB is "confused", so the main question
> is why that happens.
Ref https://sourceware.org/ml/gdb/2016-03/msg00038.html
With some of my profiles and a patch that helps somewhat (there's
still bad scaling) but also cause functional regression.
next prev parent reply other threads:[~2016-09-18 13:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-17 17:25 Fredrik Tolf
[not found] ` <F4715250-E24B-452E-9232-2469AB2EB2B2@duaneellis.com>
2016-09-17 18:43 ` Fredrik Tolf
2016-09-18 13:55 ` Yichao Yu [this message]
2016-09-19 15:10 ` Pedro Alves
2016-09-19 15:45 ` Yichao Yu
2016-09-20 2:20 ` Fredrik Tolf
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