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Re: [Qemu-devel] [PATCH 00/12] tcg: Improve register allocation for call
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From: |
Emilio G. Cota |
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Subject: |
Re: [Qemu-devel] [PATCH 00/12] tcg: Improve register allocation for calls |
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Date: |
Thu, 29 Nov 2018 19:39:15 -0500 |
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User-agent: |
Mutt/1.9.4 (2018-02-28) |
On Thu, Nov 29, 2018 at 11:23:09 -0800, Richard Henderson wrote:
> On 11/28/18 2:15 PM, Emilio G. Cota wrote:
> > Unfortunately, it doesn't seem to help, performance-wise.
>
> That is really disappointing, considering the size gains are huge -- even more
> dramatically for non-x86 hosts. I will see about some more benchmarking on
> this for other host/guest combinations.
A64 and POWER9 host numbers:
https://imgur.com/a/m6Pss99
There's quite a bit of noise in the P9 measurements, but it's
a shared machine so I can't do much about that.
I'll update the A64 results with error bars later tonight,
when I get further results.
E.
- [Qemu-devel] [PATCH 05/12] tcg: Add output_pref to TCGOp, (continued)
- [Qemu-devel] [PATCH 05/12] tcg: Add output_pref to TCGOp, Richard Henderson, 2018/11/28
- [Qemu-devel] [PATCH 06/12] tcg: Improve register allocation for matching constraints, Richard Henderson, 2018/11/28
- [Qemu-devel] [PATCH 10/12] tcg: Split out more subroutines from liveness_pass_1, Richard Henderson, 2018/11/28
- [Qemu-devel] [PATCH 12/12] tcg: Record register preferences during liveness, Richard Henderson, 2018/11/28
- [Qemu-devel] [PATCH 11/12] tcg: Add TCG_OPF_BB_EXIT, Richard Henderson, 2018/11/28
- [Qemu-devel] [PATCH 08/12] tcg: Reindent parts of liveness_pass_1, Richard Henderson, 2018/11/28
- [Qemu-devel] [PATCH 09/12] tcg: Rename and adjust liveness_pass_1 helpers, Richard Henderson, 2018/11/28
- [Qemu-devel] [PATCH 07/12] tcg: Dump register preference info with liveness, Richard Henderson, 2018/11/28
- Re: [Qemu-devel] [PATCH 00/12] tcg: Improve register allocation for calls, Emilio G. Cota, 2018/11/28