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Performance of egcs-1.0.3 vs egcs-1.1
- To: egcs at cygnus dot com
- Subject: Performance of egcs-1.0.3 vs egcs-1.1
- From: Jeffrey A Law <law at cygnus dot com>
- Date: Mon, 07 Sep 1998 19:23:38 -0600
- Reply-To: law at cygnus dot com
A while ago Richard Henderson posted some performance numbers for
egcs-1.0.3 vs the egcs-1.1 release on the Alpha.
They were disappointing to say the least.
I'd like to present a slightly differnet picture.
I don't have a suitable spec95 license, so I'm stuck using the
dated spec92 suite, but it still provides some useful information.
On my PPro compiling with -O2 -march=pentiumpro -mcpu=pentiumpro:
Here's what I get for egcs-1.0.3:
---------------------------------------------------------------
Benchmark Ref Actual SPECRatio
---------------------------------------------------------------
008.espresso 2270 12.9 176.0
022.li 6210 25.7 241.6
023.eqntott 1100 7.1 154.9
026.compress 2770 28.2 98.2
072.sc 4530 60.9 74.4
085.gcc 5460 32.5 168.0
Geometric Mean: SPECint92 141.7
Each benchmark must appear once for a valid SPECint92.
---------------------------------------------------------------
Benchmark Ref Actual SPECRatio
---------------------------------------------------------------
013.spice2g6 24000 198.5 120.9
015.doduc 1860 20.6 90.3
034.mdljdp2 7090 41.9 169.2
039.wave5 3700 35.8 103.4
047.tomcatv 2650 25.1 105.6
048.ora 7420 46.4 159.9
052.alvinn 7690 26.8 286.9
056.ear 25500 60.0 425.0
077.mdljsp2 3350 35.2 95.2
078.swm256 12700 155.6 81.6
089.su2cor 12900 122.3 105.5
090.hydro2d 13700 123.3 111.1
093.nasa7 16800 156.2 107.6
094.fpppp 9200 75.4 122.0
Geometric Mean: SPECfp92 131.6
Each benchmark must appear once for a valid SPECfp92.
And here's what I get for egcs-1.1:
---------------------------------------------------------------
Benchmark Ref Actual SPECRatio
---------------------------------------------------------------
008.espresso 2270 13.0 174.6
022.li 6210 25.1 247.4
023.eqntott 1100 5.1 215.7
026.compress 2770 28.6 96.9
072.sc 4530 60.8 74.5
085.gcc 5460 31.9 171.2
Geometric Mean: SPECint92 150.3
Each benchmark must appear once for a valid SPECint92.
---------------------------------------------------------------
Benchmark Ref Actual SPECRatio
---------------------------------------------------------------
013.spice2g6 24000 168.0 142.9
015.doduc 1860 15.1 123.2
034.mdljdp2 7090 36.6 193.7
039.wave5 3700 35.0 105.7
047.tomcatv 2650 18.3 144.8
048.ora 7420 45.6 162.7
052.alvinn 7690 26.5 290.2
056.ear 25500 60.9 418.7
077.mdljsp2 3350 33.7 99.4
078.swm256 12700 151.6 83.8
089.su2cor 12900 89.2 144.6
090.hydro2d 13700 73.8 185.6
093.nasa7 16800 158.5 106.0
094.fpppp 9200 58.5 157.3
Geometric Mean: SPECfp92 153.0
Each benchmark must appear once for a valid SPECfp92.
The integer results aren't great. Most of the speedup comes from
the infamous eqntott benchmark. A minor change I made to loop.c
(inspired by some pgcc patches) improves the branching behavior of
the inner loop for that benchmark.
But I am pleased with the improvements for floating point. They're
consistently better with egcs-1.1.
I don't have gcc-2.7 or gcc-2.8 #s handy.
I also happen to know that the PA7xxx class machines should have seen
a noticable improvement for floatign point performance. But I don't
have any #s handy. I would think the PA8000 class machines would have
improved too, but I haven't done any serious performance testing on
those boxes yet.
jeff