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Re: [Qemu-devel] 2x-3x tcg performance regression on ppc64 (maybe others
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From: |
Richard Henderson |
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Subject: |
Re: [Qemu-devel] 2x-3x tcg performance regression on ppc64 (maybe others) |
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Date: |
Fri, 1 Feb 2019 16:09:57 -0800 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 |
On 2/1/19 1:53 PM, Cleber Rosa wrote:
> Getting straight to the point, this is the ppc64 "boot linux console"
> test, running 10 times, on top my latest rebase (e8977901b, that
> includes f7b78602f).
>
> (01/10) boot_linux_console.py:BootLinuxConsole.test_ppc64_pseries: PASS
> (63.07 s)
...
> Then, with f7b78602f reverted:
>
> (01/10) boot_linux_console.py:BootLinuxConsole.test_ppc64_pseries: PASS
> (20.54 s)
This suggests that the cluster id added in that patch is perhaps uninitialized
or set incorrectly, so that we are spending much more time in code generation
than we should.
r~