Andi Kleen wrote:
On Fri, Jan 30, 2009 at 05:54:10PM +0100, Eric Dumazet wrote:
Andi Kleen a écrit :
Eric Dumazet <dada1@xxxxxxxxxxxxx> writes:
While doing oprofile tests I noticed two loops are not properly unrolled by gcc
That's because nobody passed -funroll-loops. Did you try that for
that file? Likely will need -O2 too
I dont want to unroll all loops, only those two :)
gcc 4.4 will have a way to do that per function, but earlier
you would need to move it to a separate file and specify
the option only for that.
Doing so would be still a good idea compared to your
patch because the code will be cleaner and might
be more adaptable to future architectures
(such manual tunings tend to outdate)
The interface name matching has shown up in profiles forever
though and we've actually already tried to optimize it IIRC.
Eric, I'm trying to keep all the *tables files synchronized,
could you send me a patch updating the other ones as well
please?
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