From: David Gibson <david@gibson.dropbear.id.au>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Richard Henderson <rth@twiddle.net>,
qemu-ppc@nongnu.org, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 28/32] ppc: Avoid double translation for lvx/lvxl/stvx/stvxl
Date: Fri, 29 Jul 2016 15:42:22 +1000 [thread overview]
Message-ID: <20160729054222.GS2588@voom.fritz.box> (raw)
In-Reply-To: <1469768287.5978.251.camel@kernel.crashing.org>
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On Fri, Jul 29, 2016 at 02:58:07PM +1000, Benjamin Herrenschmidt wrote:
> On Fri, 2016-07-29 at 14:40 +1000, Benjamin Herrenschmidt wrote:
> > On Fri, 2016-07-29 at 13:34 +1000, David Gibson wrote:
> > >
> > >
> > > What should I do with this in the short term? Leave it in
> > > ppc-for-2.8, or remove it for now pending possible changes?
> >
> > I think I'm still measuring a performance improvement with this, I'll
> > test a bit more and will get back to you.
> >
> > It will definitely better to do it without a helper once Richard's 128-
> > bit stuff is in.
>
> Ok, after I nice'd myself on top of all the gcc's on that test machine
> I confirm that this patch is a loss on qemu-user. It might still be a
> win for qemu-system-ppc64 due to the translation but probably not
> worth bothering.
>
> So drop this one. I'll use the 128-bit support when it becomes
> available.
Done.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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next prev parent reply other threads:[~2016-07-29 6:59 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-26 22:20 [Qemu-devel] [PATCH 01/32] ppc: Fix fault PC reporting for lve*/stve* VMX instructions Benjamin Herrenschmidt
2016-07-26 22:20 ` [Qemu-devel] [PATCH 02/32] ppc: Provide basic raise_exception_* functions Benjamin Herrenschmidt
2016-07-27 1:50 ` David Gibson
2016-07-27 3:46 ` Benjamin Herrenschmidt
2016-07-26 22:20 ` [Qemu-devel] [PATCH 03/32] ppc: Move classic fp ops out of translate.c Benjamin Herrenschmidt
2016-07-28 16:02 ` Richard Henderson
2016-07-28 21:56 ` Benjamin Herrenschmidt
2016-07-26 22:20 ` [Qemu-devel] [PATCH 04/32] ppc: Move embedded spe " Benjamin Herrenschmidt
2016-07-26 22:20 ` [Qemu-devel] [PATCH 05/32] ppc: Move DFP " Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 06/32] ppc: Move VMX " Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 07/32] ppc: Move VSX " Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 08/32] ppc: Rename fload_invalid_op_excp to float_invalid_op_excp Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 09/32] ppc: Make float_invalid_op_excp() pass the return address Benjamin Herrenschmidt
2016-07-28 16:06 ` Richard Henderson
2016-07-28 21:57 ` Benjamin Herrenschmidt
2016-07-28 22:10 ` Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 10/32] ppc: Make float_check_status() " Benjamin Herrenschmidt
2016-07-27 1:57 ` David Gibson
2016-07-27 3:47 ` Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 11/32] ppc: Don't update the NIP in floating point generated code Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 12/32] ppc: FP exceptions are always precise Benjamin Herrenschmidt
2016-07-27 2:00 ` David Gibson
2016-07-27 3:50 ` Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 13/32] ppc: Don't update NIP in lswi/lswx/stswi/stswx Benjamin Herrenschmidt
2016-07-27 2:04 ` David Gibson
2016-07-27 3:51 ` Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 14/32] ppc: Don't update NIP in lmw/stmw/icbi Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 15/32] ppc: Make tlb_fill() use new exception helper Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 16/32] ppc: Rework NIP updates vs. exception generation Benjamin Herrenschmidt
2016-07-27 2:19 ` David Gibson
2016-07-27 3:54 ` Benjamin Herrenschmidt
2016-07-27 4:35 ` Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 17/32] ppc: Fix source NIP on SLB related interrupts Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 18/32] ppc: Don't update NIP in DCR access routines Benjamin Herrenschmidt
2016-07-27 2:21 ` David Gibson
2016-07-27 3:55 ` Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 19/32] ppc: Don't update NIP in facility unavailable interrupts Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 20/32] ppc: Don't update NIP BookE 2.06 tlbwe Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 21/32] ppc: Don't update NIP on conditional trap instructions Benjamin Herrenschmidt
2016-07-27 2:26 ` David Gibson
2016-07-27 3:56 ` Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 22/32] ppc: Don't update NIP if not taking alignment exceptions Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 23/32] ppc: Don't update NIP in dcbz and lscbx Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 24/32] ppc: Make alignment exceptions suck less Benjamin Herrenschmidt
2016-07-27 2:30 ` David Gibson
2016-07-27 3:59 ` Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 25/32] ppc: Handle unconditional (always/never) traps at translation time Benjamin Herrenschmidt
2016-07-27 2:33 ` David Gibson
2016-07-27 4:00 ` Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 26/32] ppc: Speed up dcbz Benjamin Herrenschmidt
2016-07-27 2:36 ` David Gibson
2016-07-27 4:02 ` Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 27/32] ppc: Fix CFAR updates Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 28/32] ppc: Avoid double translation for lvx/lvxl/stvx/stvxl Benjamin Herrenschmidt
2016-07-29 0:49 ` Richard Henderson
2016-07-29 2:13 ` Benjamin Herrenschmidt
2016-07-29 3:34 ` David Gibson
2016-07-29 4:40 ` Benjamin Herrenschmidt
2016-07-29 4:58 ` Benjamin Herrenschmidt
2016-07-29 5:42 ` David Gibson [this message]
2016-07-29 9:00 ` Benjamin Herrenschmidt
2016-07-29 12:43 ` Richard Henderson
2016-07-26 22:21 ` [Qemu-devel] [PATCH 29/32] ppc: Don't set access_type on all load/stores on hash64 Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 30/32] ppc: Use a helper to generate "LE unsupported" alignment interrupts Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 31/32] ppc: load/store multiple and string insns don't do LE Benjamin Herrenschmidt
2016-07-26 22:21 ` [Qemu-devel] [PATCH 32/32] ppc: Speed up load/store multiple Benjamin Herrenschmidt
2016-07-27 2:47 ` David Gibson
2016-07-27 4:04 ` Benjamin Herrenschmidt
2016-07-27 1:06 ` [Qemu-devel] [PATCH 01/32] ppc: Fix fault PC reporting for lve*/stve* VMX instructions David Gibson
[not found] <579ad8bd.8481620a.89e78.f1ce@mx.google.com>
2016-07-29 4:44 ` [Qemu-devel] [PATCH 28/32] ppc: Avoid double translation for lvx/lvxl/stvx/stvxl Benjamin Herrenschmidt
2016-07-29 6:42 ` Benjamin Herrenschmidt
2016-07-29 6:56 ` Benjamin Herrenschmidt
2016-07-29 12:30 ` Richard Henderson
2016-07-29 12:37 ` Richard Henderson
2016-07-29 6:58 ` Benjamin Herrenschmidt
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