From: Richard Henderson <rth@twiddle.net>
To: Paolo Bonzini <pbonzini@redhat.com>, "Emilio G. Cota" <cota@braap.org>
Cc: "MTTCG Devel" <mttcg@greensocs.com>,
"Peter Maydell" <peter.maydell@linaro.org>,
"Peter Crosthwaite" <crosthwaite.peter@gmail.com>,
"QEMU Developers" <qemu-devel@nongnu.org>,
"Sergey Fedorov" <serge.fdrv@gmail.com>,
"Alex Bennée" <alex.bennee@linaro.org>
Subject: Re: [Qemu-devel] [PATCH 07/10] tb hash: hash phys_pc, pc, and flags with xxhash
Date: Wed, 6 Apr 2016 11:27:54 -0700 [thread overview]
Message-ID: <5705552A.9070907@twiddle.net> (raw)
In-Reply-To: <5705542E.60708@redhat.com>
On 04/06/2016 11:23 AM, Paolo Bonzini wrote:
> Perhaps better is to always use a three-word xxhash, but pick the 64-bit
> version if any of phys_pc and pc are 64-bits. The unrolling would be
> very effective, and the performance penalty not too important (64-bit on
> 32-bit is very slow anyway).
True.
It would also be interesting to put an average bucket chain length into the
"info jit" dump, so that it's easy to see how the hashing is performing for a
given guest.
r~
next prev parent reply other threads:[~2016-04-06 18:28 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-05 5:30 [Qemu-devel] [PATCH 00/10] tb hash improvements Emilio G. Cota
2016-04-05 5:30 ` [Qemu-devel] [PATCH 01/10] translate-all: add missing fold of tb_ctx into tcg_ctx Emilio G. Cota
2016-04-05 8:49 ` Paolo Bonzini
2016-04-05 5:30 ` [Qemu-devel] [PATCH 02/10] compiler.h: add QEMU_CACHELINE + QEMU_ALIGN() + QEMU_CACHELINE_ALIGNED Emilio G. Cota
2016-04-05 7:57 ` Peter Maydell
2016-04-05 17:24 ` Emilio G. Cota
2016-04-05 18:01 ` Peter Maydell
2016-04-05 19:13 ` Emilio G. Cota
2016-04-05 8:49 ` Paolo Bonzini
2016-04-05 12:57 ` Lluís Vilanova
2016-04-05 12:58 ` Peter Maydell
2016-04-05 15:29 ` Paolo Bonzini
2016-04-05 16:23 ` Lluís Vilanova
2016-04-05 16:31 ` Richard Henderson
2016-04-05 16:56 ` Peter Maydell
2016-04-05 19:02 ` Lluís Vilanova
2016-04-05 19:15 ` Richard Henderson
2016-04-05 20:09 ` Lluís Vilanova
2016-04-06 11:44 ` Paolo Bonzini
2016-04-06 12:02 ` Laurent Desnogues
2016-04-05 5:30 ` [Qemu-devel] [PATCH 03/10] seqlock: remove optional mutex Emilio G. Cota
2016-04-06 8:38 ` Alex Bennée
2016-04-05 5:30 ` [Qemu-devel] [PATCH 04/10] seqlock: rename write_lock/unlock to write_begin/end Emilio G. Cota
2016-04-06 8:42 ` Alex Bennée
2016-04-05 5:30 ` [Qemu-devel] [PATCH 05/10] include: add spinlock wrapper Emilio G. Cota
2016-04-05 8:51 ` Paolo Bonzini
2016-04-06 15:51 ` Alex Bennée
2016-04-05 5:30 ` [Qemu-devel] [PATCH 06/10] include: add xxhash.h Emilio G. Cota
2016-04-06 11:39 ` Alex Bennée
2016-04-06 22:59 ` Emilio G. Cota
2016-04-05 5:30 ` [Qemu-devel] [PATCH 07/10] tb hash: hash phys_pc, pc, and flags with xxhash Emilio G. Cota
2016-04-05 15:41 ` Richard Henderson
2016-04-05 15:48 ` Paolo Bonzini
2016-04-05 16:07 ` Richard Henderson
2016-04-05 19:40 ` Emilio G. Cota
2016-04-05 21:08 ` Richard Henderson
2016-04-06 0:52 ` Emilio G. Cota
2016-04-06 11:52 ` Paolo Bonzini
2016-04-06 17:44 ` Emilio G. Cota
2016-04-06 18:23 ` Paolo Bonzini
2016-04-06 18:27 ` Richard Henderson [this message]
2016-04-07 0:37 ` Emilio G. Cota
2016-04-07 8:46 ` Paolo Bonzini
2016-04-05 16:33 ` Laurent Desnogues
2016-04-05 17:19 ` Richard Henderson
2016-04-06 6:06 ` Laurent Desnogues
2016-04-06 17:32 ` Emilio G. Cota
2016-04-06 17:42 ` Richard Henderson
2016-04-07 8:12 ` Laurent Desnogues
2016-04-05 5:30 ` [Qemu-devel] [PATCH 08/10] qht: QEMU's fast, resizable and scalable Hash Table Emilio G. Cota
2016-04-05 9:01 ` Paolo Bonzini
2016-04-05 15:50 ` Richard Henderson
2016-04-08 10:27 ` Alex Bennée
2016-04-19 23:03 ` Emilio G. Cota
2016-04-05 5:30 ` [Qemu-devel] [PATCH 09/10] qht: add test program Emilio G. Cota
2016-04-08 10:45 ` Alex Bennée
2016-04-19 23:06 ` Emilio G. Cota
2016-04-20 7:50 ` Alex Bennée
2016-04-05 5:30 ` [Qemu-devel] [PATCH 10/10] tb hash: track translated blocks with qht Emilio G. Cota
2016-04-08 12:39 ` Alex Bennée
2016-04-05 8:47 ` [Qemu-devel] [PATCH 00/10] tb hash improvements Alex Bennée
2016-04-05 9:01 ` Paolo Bonzini
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=5705552A.9070907@twiddle.net \
--to=rth@twiddle.net \
--cc=alex.bennee@linaro.org \
--cc=cota@braap.org \
--cc=crosthwaite.peter@gmail.com \
--cc=mttcg@greensocs.com \
--cc=pbonzini@redhat.com \
--cc=peter.maydell@linaro.org \
--cc=qemu-devel@nongnu.org \
--cc=serge.fdrv@gmail.com \
/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.