Erick Perez
2006-Jun-01 01:27 UTC
[CentOS] kernel: Your time source seems to be instable or some driver is hogging interupts
The following error on a SMP x86_64 Centos 4.3 kernel 2.6.9-34 ELsmp appears at boot. and causes things to compute faster. Example, a wait(5) should wait for 5 seconds....it waits for 3 or 2. This was an open bug for that kernel. Has it been patched in the more recent kernel for Centos 2.6.9-34.0.1 ? dmseg output: Freeing unused kernel memory: 164k freed Losing some ticks... checking if CPU frequency changed. EXT3-fs: INFO: recovery required on readonly filesystem. EXT3-fs: write access will be enabled during recovery. warning: many lost ticks. Your time source seems to be instable or some driver is hogging interupts rip __do_softirq+0x41/0xa2 kjournald starting. Commit interval 5 seconds should I insert noapic at grub.conf? What will I loose if i do noapic? This is a performance oriented, intensive voice over ip server. -- ------------------------------------------- Erick Perez Linux User 376588 http://counter.li.org/ (Get counted!!!) Panama, Republic of Panama
Daniel de Kok
2006-Jun-01 06:58 UTC
[CentOS] kernel: Your time source seems to be instable or some driver is hogging interupts
On Wed, 2006-05-31 at 20:27 -0500, Erick Perez wrote:> should I insert noapic at grub.conf? What will I loose if i do noapic?You could try to use a different timer source first. There was an excellent post about this a while ago (esp. check the "If you are not running VMWare" part): http://lists.centos.org/pipermail/centos/2006-February/060651.html It boils down to using another clock with "clock=<clockname>", usually "pmtmr" and "pit" are good candidates. -- Daniel