On Tue, 2005-03-08 at 08:29 +0100, Guillaume Thouvenin wrote: > TODO: > - Run the lmbench with the user space application that manages > group of processus. if fork connector is not used the only > overhead is a test in the do_fork() routine.
For information here are some results when using the process creation tests "lat_proc fork". Test was run ten times thus the average is computed with the ten metrics. with a kernel 2.6.11-rc4-mm1 max value = 164.0588 msec min value = 159.8571 msec average = 161.7012 msec with a kernel 2.6.11-rc4-mm1 and the cnfork (cn_fork_enable == 0) max value = 163.3438 msec min value = 159.8857 msec average = 160.9447 msec with a kernel 2.6.11-rc4-mm1 and the cnfork (cn_fork_enable == 1) max value = 177.6885 msec min value = 170.9057 msec average = 173.7675 msec So we see that when the fork connector is disable the time it takes to split a process into two copies is the same (and it's normal) and when the fork connector is enable, it's around 7.5% slower. Best, Guillaume - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/