From: "Rafael Espíndola" <rafael.espindola@gmail.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] env in TLS
Date: Mon, 11 Oct 2004 18:34:17 -0300 [thread overview]
Message-ID: <564d96fb041011143445a2618d@mail.gmail.com> (raw)
In-Reply-To: <20041011083228.6907.qmail@web52501.mail.yahoo.com>
I have done some experiments in using TLS instead of LDT in the case
of the code-copying optimization:
http://lists.gnu.org/archive/html/qemu-devel/2004-09/msg00206.html
http://lists.gnu.org/archive/html/qemu-devel/2004-09/msg00248.html
Hope that it is useful.
Rafael
On Mon, 11 Oct 2004 01:32:28 -0700 (PDT), Piotr Krysik
<piotrek_priv@yahoo.com> wrote:
> Hi!
>
> Fabrice, how about moving env variable to TLS?
>
> This could improve performance (based on
> http://lists.gnu.org/archive/html/qemu-devel/2004-09/msg00294.html
>
> about 10% could be gained -- need to verify). Also
> additional register would be available for op.c
> (anyone to implement register renaming?).
>
> The main problem with this approach is portability.
> AFAIK GCC <= 3.2 doesn't recognize __thread keyword.
> For x86 we could fall-back to the LDT method from
> qemu-fast. How about other platforms? In the worst
> case we could use global variable and forget about
> multi-processor qemu-softmmu and multi-thread in
> qemu-user for some platforms in the future.
>
> Comments?
>
> Piotrek
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
>
> _______________________________________________
> Qemu-devel mailing list
> Qemu-devel@nongnu.org
> http://lists.nongnu.org/mailman/listinfo/qemu-devel
>
prev parent reply other threads:[~2004-10-11 21:42 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-11 8:32 [Qemu-devel] env in TLS Piotr Krysik
2004-10-11 9:41 ` Fabrice Bellard
2004-10-11 10:33 ` Lennert Buytenhek
2004-10-11 12:18 ` Johannes Schindelin
2004-10-11 12:37 ` Lennert Buytenhek
2004-10-11 14:59 ` Johannes Schindelin
2004-10-11 17:30 ` Lennert Buytenhek
2004-10-11 22:01 ` Johannes Schindelin
2004-10-12 2:33 ` André Braga
2004-10-11 21:34 ` Rafael Espíndola [this message]
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=564d96fb041011143445a2618d@mail.gmail.com \
--to=rafael.espindola@gmail.com \
--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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).