Mark, can we FAQ this idling topic? Idling issues seem to come up fairly frequently in the mailing list.
Dave -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Lennert Van Alboom Sent: Thursday, May 24, 2012 1:44 PM To: [email protected] Subject: EXT :Re: [Simh] VMS on SIMH/VAX on FreeBSD 9.0 (Lennert Van Alboom) On Thu, May 24, 2012 at 12:33:11PM -0400, Bob Supnik wrote: >In sim_timer.c, locate this routine (there are several versions, look >for the last one, which is for UNIX systems): > >uint32 sim_os_ms_sleep_init (void) >{ >uint32 i, t1, t2, tot, tim; > >for (i = 0, tot = 0; i < sleep1Samples; i++) { > t1 = sim_os_msec (); > sim_os_ms_sleep (1); > t2 = sim_os_msec (); > tot += (t2 - t1); > } >tim = (tot + (sleep1Samples - 1)) / sleep1Samples; >if (tim > SIM_IDLE_MAX) > tim = 0; >return tim; >} > >If you are running with gdb, place a breakpoint on the line > >if (tim > SIM_IDLE_MAX) > >and see what the value of 'tim' is. Otherwise, insert the following >before the if statement: > >printf ("Calculated minimum sleep time = %d\r\n", tim); > >and see what gets printed out. We seem to have a winner: Calculated minimum sleep time = 20 After a tip from zoran at #vms, I checked the FreeBSD host clock settings: [alver@bsd ~]$ sysctl kern.clockrate kern.clockrate: { hz = 100, tick = 10000, profhz = 8128, stathz = 127 } This was a tad too slow - 100 ticks per second. I changed it to 1000 ticks per second in /boot/loader.conf: kern.hz="1000" After rebooting, the clockrate was adjusted to this: [alver@bsd ~]$ sysctl kern.clockrate kern.clockrate: { hz = 1000, tick = 1000, profhz = 8128, stathz = 127 } And lo, behold: Calculated minimum sleep time = 2 VAX simulator V3.9-0 sim> SHOW CPU CPU, idle=VMS, idle enabled, stability wait = 20s, 64MB, HALT to console So it's working as expected now. Thanks everyone for the assistance! Now back to clustering VAXen over an openvpn L2 link... :-) Lennert _______________________________________________ Simh mailing list [email protected] http://mailman.trailing-edge.com/mailman/listinfo/simh _______________________________________________ Simh mailing list [email protected] http://mailman.trailing-edge.com/mailman/listinfo/simh
