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Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to spe
From: |
Karel Gardas |
Subject: |
Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation? |
Date: |
Wed, 29 Jul 2015 15:45:28 +0200 |
On Wed, Jul 29, 2015 at 12:20 PM, Dennis Luehring <address@hidden> wrote:
> Am 29.07.2015 um 11:17 schrieb Karel Gardas:
>>
>> If
>> anybody is interested I can dig those old emails.
>
>
> would be nice
Here is speed comparison:
https://lists.debian.org/debian-sparc/2015/02/msg00001.html but whole
thread started in january here:
https://lists.debian.org/debian-sparc/2015/01/msg00000.html
Mark then asked for profiles, I see I send them privately due to
attachements, the email is:
off-list as I'm attaching files which may be too bit for list. Also
I'm not sure if this is still relevant to debian-sparc@
Anyway, difference in IO is negligible. When I compile on SPARC on
tmpfs it was still 6m40s. On SPARC it's using -drive while on AArch64
it uses all the virtio optimization probably.
Anyway, with gprof you've hit the point. Attached two files (text
output from gprof). One shows profiler as a reference, just
boot/login/su root/poweroff/kill qemu and another is the same but ~5
hours of compilation of nbench2 in shell loop.
reference shows:
% cumulative self self total
time seconds seconds calls ms/call ms/call name
42.9 145.84 145.84 cpu_sparc_exec [1]
7.8 172.44 26.60 tcg_optimize [2]
4.4 187.38 14.94 tcg_reg_alloc_op [3]
4.4 202.20 14.82 get_physical_address_data [4]
3.8 215.26 13.06 tcg_liveness_analysis [5]
while compile loop shows:
% cumulative self self total
time seconds seconds calls ms/call ms/call name
21.2 1008.09 1008.09 tlb_flush_page [1]
15.2 1731.09 723.00 cpu_sparc_exec [2]
13.6 2374.79 643.70 tb_flush_jmp_cache [3]
9.5 2823.86 449.07 tcg_optimize [4]
4.2 3024.26 200.40 tcg_liveness_analysis [5]
that's indeed a difference. -- I assume cpu_sparc_exec is what does
actual work here...
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, (continued)
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/07/29
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Artyom Tarasenko, 2015/07/29
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Aurelien Jarno, 2015/07/29
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/07/29
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Aurelien Jarno, 2015/07/30
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/07/30
Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/07/29
Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Karel Gardas, 2015/07/29
Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/07/29
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Karel Gardas, 2015/07/29
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Karel Gardas, 2015/07/29
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/07/29
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Karel Gardas, 2015/07/29
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/07/29
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Paolo Bonzini, 2015/07/30
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Artyom Tarasenko, 2015/07/30
Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Aurelien Jarno, 2015/07/30