Re: Why user time of the process depends on machine load?

2011-06-16 Thread John Baldwin
On Wednesday, June 15, 2011 5:55:17 pm Dan Nelson wrote: In the last episode (Jun 15), Yuri said: When I test performance of the code, I always observe dependency of CPU user time on the presence of other CPU intense processes. Same CPU-only deterministic process that on the quiet machine

kexec or similar for FreeBSD

2011-06-16 Thread Russell Cattelan
I have been contacted about possibly implementing a fast reboot mechanism for FreeBSD similar to kexec on Linux. I have just started looking into how this accomplished so I figured a note to freebsd hackers would also be a good place to ask for comments. Has anybody looked at doing something

Re: kexec or similar for FreeBSD

2011-06-16 Thread Matthew Jacob
Hi Russell! Yes, I think it is. Solaris supports something like this and the idea here is that with complicated I/O subsystems it's too hard to get them and locks cleaned up in a crash, but you want to get all the forensics you can, so doing a jump to a preloaded kernel that has a small and

Re: kexec or similar for FreeBSD

2011-06-16 Thread Gleb Kurtsou
On (16/06/2011 13:32), Russell Cattelan wrote: I have been contacted about possibly implementing a fast reboot mechanism for FreeBSD similar to kexec on Linux. I have just started looking into how this accomplished so I figured a note to freebsd hackers would also be a good place to ask for

Re: kexec or similar for FreeBSD

2011-06-16 Thread Russell Cattelan
On 6/16/11 3:06 PM, Gleb Kurtsou wrote: On (16/06/2011 13:32), Russell Cattelan wrote: I have been contacted about possibly implementing a fast reboot mechanism for FreeBSD similar to kexec on Linux. I have just started looking into how this accomplished so I figured a note to freebsd hackers