Hi Ingo, > > > Hi Ingo and all, > > > > > > When I was executing massive interactive processes, I found that some > > > of them occupy CPU time and the others hardly run. > > > > yeah. > > > > > I also attach the test program which easily recreates this problem. > > > > thanks, this is really helpful - does the patch below improve the > > situation?
I tested your patch and it seems to work well. Test environment ================ - kernel: 2.6.21-rc5 with or without Ingo's patch - others: same as my initial mail except for omitting nice 19 cases Result (without Ingo's patch) ============================= +---------+-----------+------+------+------+--------+ | # of | # of | avg | max | min | stdev | | CPUs | processes | (*1) | (*2) | (*3) | (*4) | +---------+-----------+------+------+------+--------+ | 1(i386) | 200 | 162 | 8258 | 1 | 1113 | +---------+-----------+------+------+------+--------+ | | | 378 | 9314 | 2 | 1421 | | 2(ia64) | 400 +------+------+------+--------+ | | | 189 |12544 | 1 | 1443 | +---------+-----------+------+------+------+--------+ *1) average number of loops among all processes *2) maximum number of loops among all processes *3) minimum number of loops among all processes *4) standard deviation Result (with Ingo's patch) ========================== +---------+-----------+------+------+------+--------+ | # of | # of | avg | max | min | stdev | | CPUs | processes | | | | | +---------+-----------+------+------+------+--------+ | 1(i386) | 200 | 153 | 232 | 128 | 7.67 | +---------+-----------+------+------+------+--------+ | | | 376 | 451 | 291 | 17.6 | | 2(ia64) | 400 +------+------+------+--------+ | | | 188 | 236 | 137 | 14.5 | +---------+-----------+------+------+------+--------+ Although it is not perfectly fair, it is certain that this patch really improve the situation in dramatic form. Thank you very much! Satoru - 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/
