Re: PHP performance on Xen domU with mulitple vcpu
Emmanuel Dreyfus <[email protected]>
| Newsgroups | gmane.os.netbsd.ports.xen,gmane.os.netbsd.devel.kernel |
|---|---|
| Message-ID | <[email protected]> |
On Sat, Apr 05, 2025 at 04:02:28PM -0700, Greg A. Woods wrote: > > Indeed, this is 4.3.1 > I'm not sure I understand that number. Sorry, I am not sure how I managed to write that. I meant 4.18.3 xen_version : 4.18.3_20240909nb1 > That's what I meant -- that with clockinterrupt then ntpd is able to > keep the system wallclock time in sync vs. falling out of sync when > using xen_system_time. Yes, this is what happens. > One other question I forgot to ask: With xen_system_time does > timekeeping work OK for the first few days and then go bad, or is it bad > right from boot? ntpq -c kerninfo shows maximum error steadily rising from 16000 by 0.5 each second. That starts at boot time, and it never syncs. # while true; do ntpq -c kerninfo|grep "maximum error"; sleep 1; done maximum error: 16326.5 maximum error: 16327 maximum error: 16327.5 maximum error: 16328 maximum error: 16328.5 maximum error: 16329 -- Emmanuel Dreyfus [email protected]