Messages in this thread | | | Date | Fri, 21 Mar 2008 21:55:33 +0100 | From | Gabriel C <> | Subject | Re: 2.6.25-rc5-git6: Reported regressions from 2.6.24 |
| |
Gabriel C wrote: > Thomas Gleixner wrote: >> On Fri, 21 Mar 2008, Gabriel C wrote: >>>>> Also, can you please reapply the reverted clocksource patch ? I have >>>>> the feeling that the acpi_pm one was the real problem which was >>>>> triggered the modfied watchdog. >>>> Sure I can , will do so in some minutes and let you know. >>> It took a bit longer sorry but I have more infos now. >>> >>> The acpi_pm was not related to that I still get the problem. >>> >>> Of course I still can try to find the commit which magically fixed acpi_pm if you really want. >> Just if you are really bored. :) I would have asked if it had fixed >> the TSC issue. >> >>> It seems like it breaks only when you enable HT and only on 2 socket motherboards. >>> ( at least the ones I own , I know is old hardware but worked fine for me ) >> Hmm. I wonder why a dual socket board survives the initial sync test. >> >>> Also disabling the second CPU and enabling HT works , enabling both >>> CPUs and disabling HT works , booting with enabled HT and both CPUs >>> but maxcpus=2 also works , booting with 2 CPUs and HT on breaks , >>> booting with both CPUs HT on but maxcpus=3 breaks also. >>> >>> Also I have another dual motherboard here 604 socket with 2 2,4 GHz >>> Xeon's. The motherboard has the storage controller somewhat broken >>> but for a quick test it is still good :) and I see the same thing. >>> >>> Does that make any sense ? >> Not really. Can you please revert the reverted revert again and run >> >> http://people.redhat.com/mingo/time-warp-test/time-warp-test.c >> >> on your machine with all CPUs and HT enabled ? > > Sure , doing so now. >
Here the result on 2.6.25-rc6-00243-g028011e ( it was running 30++ minutes the time I was away for food =) )
...
4 CPUs, running 4 parallel test-tasks. checking for time-warps via: - read time stamp counter (RDTSC) instruction (cycle resolution) - gettimeofday (TOD) syscall (usec resolution) - clock_gettime(CLOCK_MONOTONIC) syscall (nsec resolution)
| 1.46 us, TSC-warps:0 | 16.01 us, TOD-warps:0 | 16.10 us, CLOCK-warps:0
...
Gabriel
| |