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Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to spe
From: |
Richard Henderson |
Subject: |
Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation? |
Date: |
Sat, 22 Aug 2015 17:41:46 -0700 |
On Aug 22, 2015 9:45 AM, Artyom Tarasenko <address@hidden> wrote:
> For my test case tcg-indirect brings more performance gain than for Dennis:
>
> git master: 18m31s
> tcg-indirect: 16m50s
> #undef USE_TCG_OPTIMIZATIONS: 14m18s
Thanks. That's useful.
>
>
> JIT statistic, before starting the test:
> (qemu) info jit
> Translation buffer state:
> gen code size 31851136/314448896
> TB count 128224/2457592
> TB avg target size 18 max=704 bytes
> TB avg host size 248 bytes (expansion ratio: 13.4)
> cross page TB count 0 (0%)
> direct jump count 83840 (65%) (2 jumps=64730 50%)
>
> Statistics:
> TB flush count 5
> TB invalidate count 317160
> TLB flush count 1180769
> [TCG profiler not compiled]
>
> After
> (qemu) info jit
> Translation buffer state:
> gen code size 282903344/314448896
> TB count 1139744/2457592
> TB avg target size 17 max=704 bytes
> TB avg host size 248 bytes (expansion ratio: 14.0)
> cross page TB count 0 (0%)
> direct jump count 739828 (64%) (2 jumps=569074 49%)
>
> Statistics:
> TB flush count 5
> TB invalidate count 324362
> TLB flush count 2050744
>
> So, TB invalidate count gained only ~ 5000.
> Yet tcg_optimize is ~7% in the perf top, and tcg_liveness_analysis
> ~3%. Why do we translate so much?
I don't know. It must be something SPARC specific, as I don't see so much for
alpha.
I'll try to think of good places to collect data.
r~
- 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, 2015/08/21
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Richard Henderson, 2015/08/21
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/08/21
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Richard Henderson, 2015/08/21
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Aurelien Jarno, 2015/08/21
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/08/21
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Artyom Tarasenko, 2015/08/22
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/08/22
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Artyom Tarasenko, 2015/08/22
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/08/23
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?,
Richard Henderson <=
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Artyom Tarasenko, 2015/08/26
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Richard Henderson, 2015/08/26
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/08/27
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Richard Henderson, 2015/08/27
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Artyom Tarasenko, 2015/08/27
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/08/20
- Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Artyom Tarasenko, 2015/08/20
Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?, Dennis Luehring, 2015/08/03