>this is what i suspected. If we are switching 450 threads that also do
>some real work then we are trashing the cache _badly_ already, so pure
>scheduling costs will not matter at all. Most systems (even loaded
>servers) have typically less than 5 runnable processes. So those systems
>will see 15% scheduling slowdown. Some applications might use many threads
>- for those cases your patch is a nice improvement.
Sorry, but are we building a new version of MS-DOS here ???
Linux is well known as good server platform and You want to say me that
more of Linux users will fall the 2 thread case ??!?!
In a schedule() algo filled of gotos to get a better prefetch queue that can
improve speed no more then 10 % I post a patch that on tipical Linux machines
will lead to a 30 up to 80 % of increasing performance.
Now one of the two things must be true:
1) I'm crazy
2) I'm in the wrong place
Let me know.
Cheers,
Davide.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/