From: Richard Henderson <rth@twiddle.net>
To: Dennis Luehring <dl.soluz@gmx.net>,
Artyom Tarasenko <atar4qemu@gmail.com>,
Aurelien Jarno <aurelien@aurel32.net>
Cc: qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?
Date: Fri, 21 Aug 2015 08:47:52 -0700 [thread overview]
Message-ID: <55D74828.6050209@twiddle.net> (raw)
In-Reply-To: <55D6BFAD.4080501@gmx.net>
On 08/20/2015 11:05 PM, Dennis Luehring wrote:
>> > g++ src/pugixml.cpp -g -Wall -Wextra -Werror -pedantic -std=c++0x -c -MMD -MP
>> >
>> > tcg-indirect: ~2:46.5
>> > qemu.org-git: ~2:51.2 (worst result)
>> > without-optimization: ~2:14.1 (best result)
>>
>> No compiler optimization? I wouldn't expect there to be much for tcg to
>> optimize there -- dropping values to memory all the time doesn't leave much.
>
>
> without-optimization means qemu.org-git release build + undefine
> USE_TCG_OPTIMIZATIONS in tcg/tcg.c
> or what compiler do you mean?
The one for compiling the benchmark: g++ -O2.
>> These results are weird. Unoptimized less than half the speed of mainline?
>> Improving optimization (with no extra work, mind) brings the results back down?
>
>
> yep they are - it seems that the assumption of the involved developers
> where speed can be improved / or slowbess comes from is not correct
> how are SPARC64 benchmarks done usually?
*shrug* No different than any other...
r~
next prev parent reply other threads:[~2015-08-21 15:48 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-28 7:52 [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation? Dennis Luehring
2015-07-28 9:54 ` Artyom Tarasenko
2015-07-29 6:20 ` Dennis Luehring
2015-07-29 8:23 ` Artyom Tarasenko
2015-07-29 15:01 ` Aurelien Jarno
2015-07-30 3:52 ` Dennis Luehring
2015-07-30 7:52 ` Aurelien Jarno
2015-07-30 8:16 ` Dennis Luehring
2015-07-30 8:42 ` Artyom Tarasenko
2015-07-30 8:55 ` Aurelien Jarno
2015-07-30 9:35 ` Artyom Tarasenko
2015-07-30 10:09 ` Aurelien Jarno
2015-07-30 18:21 ` Dennis Luehring
2015-07-30 15:50 ` Aurelien Jarno
2015-07-31 15:31 ` Artyom Tarasenko
2015-07-31 15:43 ` Aurelien Jarno
2015-08-02 13:11 ` Mark Cave-Ayland
2015-08-03 8:31 ` Artyom Tarasenko
2015-08-03 9:17 ` Aurelien Jarno
2015-08-18 9:24 ` Artyom Tarasenko
2015-08-18 17:55 ` Richard Henderson
2015-08-19 10:41 ` Artyom Tarasenko
2015-08-19 11:00 ` Aurelien Jarno
2015-08-19 14:41 ` Artyom Tarasenko
2015-08-20 5:22 ` Dennis Luehring
2015-08-20 10:40 ` Artyom Tarasenko
2015-08-20 17:19 ` Richard Henderson
2015-08-21 4:32 ` Dennis Luehring
2015-08-21 5:49 ` Richard Henderson
2015-08-21 6:05 ` Dennis Luehring
2015-08-21 15:47 ` Richard Henderson [this message]
2015-08-21 16:13 ` Aurelien Jarno
2015-08-21 16:41 ` Dennis Luehring
2015-08-22 16:45 ` Artyom Tarasenko
2015-08-22 17:47 ` Dennis Luehring
2015-08-22 18:53 ` Artyom Tarasenko
2015-08-23 12:11 ` Dennis Luehring
2015-08-23 0:41 ` Richard Henderson
2015-08-26 16:17 ` Artyom Tarasenko
2015-08-26 19:47 ` Richard Henderson
2015-08-27 5:54 ` Dennis Luehring
2015-08-27 15:04 ` Richard Henderson
2015-08-27 15:58 ` Artyom Tarasenko
2015-08-17 11:32 ` Dennis Luehring
2015-08-03 7:58 ` Dennis Luehring
2015-08-03 14:51 ` Dennis Luehring
2015-08-03 15:59 ` Karel Gardas
2015-08-03 19:51 ` Dennis Luehring
2015-08-06 9:00 ` Karel Gardas
2015-08-06 9:21 ` Dennis Luehring
2015-08-06 9:27 ` Dennis Luehring
2015-08-06 12:50 ` Karel Gardas
2015-08-06 16:35 ` Dennis Luehring
2015-08-18 4:25 ` Dennis Luehring
2015-08-18 8:19 ` Aurelien Jarno
2015-08-18 10:39 ` Dennis Luehring
2015-08-18 11:21 ` Dennis Luehring
[not found] ` <CAMO55fkcW1eOaZSz2MJgqZEP29pTuHvTLe0Kna5eHYfg7cFyPA@mail.gmail.com>
2015-08-19 4:28 ` Dennis Luehring
2015-07-29 8:07 ` Dennis Luehring
2015-07-29 15:03 ` Aurelien Jarno
2015-07-29 9:17 ` Karel Gardas
2015-07-29 10:20 ` Dennis Luehring
2015-07-29 13:45 ` Karel Gardas
2015-07-29 15:13 ` Aurelien Jarno
2015-07-29 10:55 ` Dennis Luehring
2015-07-29 12:34 ` Karel Gardas
2015-07-29 12:38 ` Karel Gardas
2015-07-29 13:55 ` Dennis Luehring
2015-07-29 14:41 ` Karel Gardas
2015-07-30 3:47 ` Dennis Luehring
2015-07-30 7:12 ` Paolo Bonzini
2015-07-30 8:31 ` Artyom Tarasenko
2015-08-02 19:12 ` Alex Bennée
2015-07-30 7:55 ` Aurelien Jarno
2015-08-17 14:19 ` Artyom Tarasenko
2015-08-17 15:40 ` Richard Henderson
2015-08-17 16:25 ` Artyom Tarasenko
2015-08-17 21:08 ` Aurelien Jarno
2015-08-27 15:29 ` Artyom Tarasenko
2015-09-02 4:34 ` Dennis Luehring
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=55D74828.6050209@twiddle.net \
--to=rth@twiddle.net \
--cc=atar4qemu@gmail.com \
--cc=aurelien@aurel32.net \
--cc=dl.soluz@gmx.net \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.