Issue #5335 has been updated by Motohiro KOSAKI. Done. r33454 and r33456. ---------------------------------------- Backport #5335: [RFC/PATCH] test_old_thread_select: timing tweaks http://redmine.ruby-lang.org/issues/5335 Author: Eric Wong Status: Closed Priority: Normal Assignee: Motohiro KOSAKI Category: Target version: I was getting timing errors and short select() timeouts on CentOS 5.6 2.6.18-238.9.1.el5xen most likely due to CONFIG_HZ=250 and the lack of dynticks, but maybe being a Xen VM has this effect, too. select() itself appears to just be inaccurate on this system: strace -e select -T ./ruby -e 'select([STDIN],nil,nil,0.001)' select(1, [0], NULL, NULL, {0, 1000}) = 0 (Timeout) <0.000046> I'm not happy with timing tests, but I can't think of another way to test functionality like this. -- http://redmine.ruby-lang.org