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From: Dennis Luehring <dl.soluz@gmx.net>
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Date: Thu, 20 Aug 2015 07:22:11 +0200
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Subject: Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do
 to speedup the emulation?
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To: Artyom Tarasenko <atar4qemu@gmail.com>, Aurelien Jarno <aurelien@aurel32.net>
Cc: qemu-devel <qemu-devel@nongnu.org>, Richard Henderson <rth@twiddle.net>

Am 19.08.2015 um 16:41 schrieb Artyom Tarasenko:
> And if I completely disable optimizer (// #define
> USE_TCG_OPTIMIZATIONS in tcg.c), it's still quite faster:
>
> real    14m17.668s
> user    14m10.241s
> sys     0m6.060s

my tests also without USE_TCG_OPTIMIZATIONS

qemu 2.4.50, netbsd 6.1.5 SPARC64

without-optimization
//#define USE_TCG_OPTIMIZATIONS

pugixml compile: (without-optimization is faster)
with-optimization: ~2:51.2
without-optimization: ~2:14.1

prime.c runtime: (without-optimization is faster)
with-optimization: ~11 sec
without-optimization: ~9.9 sec

stream results (with-optimization gives better results)

with-optimization:

Your clock granularity/precision appears to be 42 microseconds.
Each test below will take on the order of 330428 microseconds.
     (= 7867 clock ticks)
Function    Best Rate MB/s  Avg time     Min time     Max time
Copy:             771.5     0.214717     0.207377     0.244214
Scale:            288.1     0.573320     0.555401     0.660161
Add:              423.5     0.633523     0.566661     1.092067
Triad:            242.9     1.053032     0.987970     1.499563

without-optimization:

Your clock granularity/precision appears to be 41 microseconds.
Each test below will take on the order of 745254 microseconds.
    (= 18176 clock ticks)
Function    Best Rate MB/s  Avg time     Min time     Max time
Copy:             316.6     0.524065     0.505313     0.580103
Scale:            200.5     0.813356     0.798024     0.840986
Add:              243.9     1.010247     0.984025     1.119149
Triad:            182.9     1.345601     1.312236     1.427459