From: Tim Deegan <tim@xen.org>
To: Jan Beulich <JBeulich@suse.com>
Cc: Eddie Dong <eddie.dong@intel.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Jacob Shin <jacob.shin@amd.com>,
Jun Nakajima <jun.nakajima@intel.com>,
xen-devel <xen-devel@lists.xenproject.org>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
suravee.suthikulpanit@amd.com
Subject: Re: Ping: [PATCH 0/4] HVM: produce better binary code
Date: Thu, 5 Sep 2013 08:58:29 +0100 [thread overview]
Message-ID: <20130905075829.GA63530@ocelot.phlegethon.org> (raw)
In-Reply-To: <5228544E02000078000F0AC6@nat28.tlf.novell.com>
At 08:52 +0100 on 05 Sep (1378371134), Jan Beulich wrote:
> >>> On 04.09.13 at 18:30, Tim Deegan <tim@xen.org> wrote:
> > I'm not certain, on a modern CPU, whether it's better to issue a series
> > of PUSHes or a series of %rsp-relative MOVs and a SUB.
>
> When I did the push/pop -> mov conversion for the non-HVM code
> I did some measurements, with the result that the sequence of
> moves was never slower but sometimes (usually on older CPUs)
> faster.
Ah, excellent!
Tim.
prev parent reply other threads:[~2013-09-05 7:58 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-23 13:58 [PATCH 0/4] HVM: produce better binary code Jan Beulich
2013-08-23 14:01 ` [PATCH 1/4] VMX: streamline entry.S code Jan Beulich
2013-08-26 10:44 ` Andrew Cooper
2013-08-26 11:01 ` Jan Beulich
2013-08-26 11:48 ` Andrew Cooper
2013-08-26 13:12 ` Jan Beulich
2013-08-26 13:22 ` Andrew Cooper
2013-08-29 11:01 ` Tim Deegan
2013-08-29 12:35 ` Jan Beulich
2013-08-23 14:02 ` [PATCH 2/4] VMX: move various uses of UD2 out of fast paths Jan Beulich
2013-08-23 22:06 ` Andrew Cooper
2013-08-26 8:50 ` Jan Beulich
2013-08-26 9:07 ` Andrew Cooper
2013-08-26 8:58 ` [PATCH v2 " Jan Beulich
2013-08-26 9:09 ` Andrew Cooper
2013-08-29 11:08 ` Tim Deegan
2013-08-23 14:03 ` [PATCH 3/4] VMX: use proper instruction mnemonics if assembler supports them Jan Beulich
2013-08-24 22:18 ` Andrew Cooper
2013-08-26 9:06 ` Jan Beulich
2013-08-26 9:25 ` Andrew Cooper
2013-08-26 9:41 ` Jan Beulich
2013-08-26 10:18 ` [PATCH v3 " Jan Beulich
2013-08-26 13:05 ` Andrew Cooper
2013-08-26 13:20 ` Jan Beulich
2013-08-26 14:03 ` [PATCH v4 " Jan Beulich
2013-08-26 14:18 ` Andrew Cooper
2013-08-26 14:29 ` Jan Beulich
2013-08-26 15:07 ` Andrew Cooper
2013-08-26 15:10 ` Andrew Cooper
2013-08-26 15:30 ` Jan Beulich
2013-08-26 15:29 ` Jan Beulich
2013-08-26 15:33 ` Andrew Cooper
2013-08-26 15:31 ` [PATCH v5 " Jan Beulich
2013-08-26 15:36 ` Andrew Cooper
2013-08-29 11:47 ` Tim Deegan
2013-08-29 12:30 ` Jan Beulich
2013-08-29 13:11 ` Tim Deegan
2013-08-29 13:27 ` Jan Beulich
2013-08-29 14:02 ` Tim Deegan
2013-08-29 12:45 ` Jan Beulich
2013-08-29 13:19 ` Tim Deegan
2013-08-26 9:03 ` [PATCH v2 " Jan Beulich
2013-08-23 14:04 ` [PATCH 4/4] SVM: streamline entry.S code Jan Beulich
2013-08-26 16:20 ` Andrew Cooper
2013-08-26 17:20 ` Keir Fraser
2013-08-26 17:46 ` Andrew Cooper
2013-08-26 21:47 ` Andrew Cooper
2013-08-27 7:38 ` Jan Beulich
2013-08-29 11:56 ` Tim Deegan
2013-09-04 14:39 ` Boris Ostrovsky
2013-09-04 14:50 ` Jan Beulich
2013-09-04 15:09 ` Boris Ostrovsky
2013-09-04 15:20 ` Jan Beulich
2013-09-04 16:42 ` Boris Ostrovsky
2013-09-05 7:10 ` Jan Beulich
2013-09-04 10:06 ` Ping: [PATCH 0/4] HVM: produce better binary code Jan Beulich
2013-09-04 16:16 ` Andrew Cooper
2013-09-04 16:30 ` Tim Deegan
2013-09-05 7:52 ` Jan Beulich
2013-09-05 7:58 ` Tim Deegan [this message]
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