On 10/04/10 15:12, Bogdan Costescu wrote:
Have there been any process scheduler changes in the newer kernels ?
Are there ever kernels where that doesn't get tweaked ? ;-)
I'm not sure that they could explain four orders of magnitude differences though...
One idea that comes to mind would be to run the child processes under strace -c as that will monitor all the system calls and report how long is spent in which. By running a comparison with 2.6.23 and 2.6.24 then you might get a pointer to which syscall(s) are taking longer. Alternatively if you want to get fancy then you could play with doing a git bisection between 2.6.23 and 2.6.24 to track down the commit that introduces the regression. To be honest it'd be interesting to see whether the issue still manifests on a recent kernel though, if so then perhaps we might be able to get the kernel developers interested (though they will likely ask for a bisection too). cheers! Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC
