Kris Kennaway wrote:
P.S. If I understand correctly, the float test shows a regression?
The metric is calculations/second, so higher = better?
The documentation on Unixbench is scarce, but I would think so.
Interesting. Some candidate changes from 2007-10-02:
Modified files:
contrib/gcc opts.c
Log:
Do not imply -ftree-vrp with -O2 and above. One must implicitly specify
'-ftree-vrp' if one wants it.
Some bad code generation has been tracked to -ftree-vrp. jdk1{5,6} are
notable examples.
OK, so it was this one. The other interesting events seem to be:
2007-10-20: drop in super-smack performance and context switch
benchmarks. This is due to the switch from SCHED_4BSD to SCHED_ULE
(super-smack is largely a context switch benchmark due to retarded
design). There are uncommitted patches that reduce ULE context switch
overhead though, so it will be interesting to see how they affect this.
2007-12-30: file read/pipe read/pipe ping-pong/syscall overhead
performance increases. This is due to Jeff's lockless struct file
changes (syscall overhead is only affected because unixbench uses the
dup2() syscall which is not in fact just a measure of syscall overhead
but now has reduced non-syscall cost).
Kris
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