|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Guest OS boots up slowly
Thanks Masaki! I've taken a quick look at the trace and haven't seen anything really obvious. Unfortunately I have some urgent work to do for XenServer, so this will have to take a back burner for a week or so. If anyone else is willing to investigate the problem, I certainly won't object. :-) -George 2009/9/1 Masaki Kanno <kanno.masaki@xxxxxxxxxxxxxx>: > Hi George, > > I tested xen-unstable (changeset: 20128) and linux-2.6.18-xen > (changeset: 931) with the following cases. > debit-accounted-only.diff doesn't fix the problem. > I will send a trace data file to only you because the size of > the file is big. > > Case1 : With debit-accounted-only.diff, cpu_weight dom0:domU = 256:256 >   Â| vcpus | cpu_cap | boot-up  Â| >   Â|    |     | times[sec] | >   Â+-------+---------+------------+ >   Â|  1  |   0  |   57   | >   Â|  1  |  Â50  |   80   | >   Â|  1  |  100  |   56   | >   Â|  2  |   0  |   51   | >   Â|  2  |  Â50  |   93   | >   Â|  2  |  100  |   62   | >   Â|  2  |  150  |   54   | >   Â|  2  |  200  |   50   | > > Case2 : With debit-accounted-only.diff, cpu_weight dom0:domU = 256:512 >   Â| vcpus | cpu_cap | boot-up  Â| >   Â|    |     | times[sec] | >   Â+-------+---------+------------+ >   Â|  1  |   0  |   57   | >   Â|  1  |  Â50  |  Â725   | Slow!! >   Â|  1  |  100  |   57   | >   Â|  2  |   0  |   51   | >   Â|  2  |  Â50  | 1,000 over | I gave up the measurement. >   Â|  2  |  100  |  Â784   | Slow!! >   Â|  2  |  150  |  Â567   | Slow!! >   Â|  2  |  200  |   51   | > > Case3 : No patch, cpu_weight dom0:domU = 256:256 >   Â| vcpus | cpu_cap | boot-up  Â| >   Â|    |     | times[sec] | >   Â+-------+---------+------------+ >   Â|  1  |   0  |   57   | >   Â|  1  |  Â50  |   80   | >   Â|  1  |  100  |   57   | >   Â|  2  |   0  |   50   | >   Â|  2  |  Â50  |   95   | >   Â|  2  |  100  |   61   | >   Â|  2  |  150  |   53   | >   Â|  2  |  200  |   50   | > > Case4 : No patch, cpu_weight dom0:domU = 256:512 >   Â| vcpus | cpu_cap | boot-up  Â| >   Â|    |     | times[sec] | >   Â+-------+---------+------------+ >   Â|  1  |   0  |   57   | >   Â|  1  |  Â50  |  Â575   | Slow!! >   Â|  1  |  100  |   57   | >   Â|  2  |   0  |   50   | >   Â|  2  |  Â50  |  Â594   | Slow!! >   Â|  2  |  100  |  Â450   | Slow!! >   Â|  2  |  150  |  Â290   | Slow!! >   Â|  2  |  200  |   51   | > > Case5 : Without changeset 20122, cpu_weight dom0:domU = 256:256 >   Â| vcpus | cpu_cap | boot-up  Â| >   Â|    |     | times[sec] | >   Â+-------+---------+------------+ >   Â|  1  |   0  |   57   | >   Â|  1  |  Â50  |   80   | >   Â|  1  |  100  |   56   | >   Â|  2  |   0  |   50   | >   Â|  2  |  Â50  |   95   | >   Â|  2  |  100  |   61   | >   Â|  2  |  150  |   53   | >   Â|  2  |  200  |   50   | > > Case6 : Without changeset 20122, cpu_weight dom0:domU = 256:512 >   Â| vcpus | cpu_cap | boot-up  Â| >   Â|    |     | times[sec] | >   Â+-------+---------+------------+ >   Â|  1  |   0  |   56   | >   Â|  1  |  Â50  |   80   | >   Â|  1  |  100  |   56   | >   Â|  2  |   0  |   50   | >   Â|  2  |  Â50  |   95   | >   Â|  2  |  100  |   61   | >   Â|  2  |  150  |   53   | >   Â|  2  |  200  |   50   | > > > Best regards, > ÂKan > > Tue, 01 Sep 2009 08:41:39 +0900, Masaki Kanno wrote: > >>Hi George, >> >>I will try them on today. >> >> Kan >> >>Mon, 31 Aug 2009 14:10:47 +0100, George Dunlap wrote: >> >>>Hmm, it appears my patch still debits credits for VMs that aren't >>>earning credits anymore; such VMs can earn an unlimited amount of >>>negative credit before becoming active again. >>> >>>Try the attached patches; if it doesn't fix the problem, please take a >>>short trace during boot using the following command and send it to me: >>> >>># xentrace -D -e 0x2f000 -S 128 -s 1000 /tmp/sched-boot.trace >>> >>>Thanks, >>> -George >>> >>>On Mon, Aug 31, 2009 at 9:34 AM, Keir Fraser<keir.fraser@xxxxxxxxxxxxx> >>>wrote: >>>> Hi Maskai, >>>> >>>> Thanks for the report. It's a good idea to Cc the patch author when making >>>> bug reports. In this case it's George Dunlap who I've cc'ed in this reply. >>>> >>>> ï-- Keir >>>> >>>> On 31/08/2009 07:50, "Masaki Kanno" <kanno.masaki@xxxxxxxxxxxxxx> wrote: >>>> >>>>> Hi, >>>>> >>>>> I tested the latest xen-unstable (changeset: 20128) and the latest >>>>> linux-2.6.18-xen (changeset: 931). ïA guest OS is booted up slower >>>>> than before. ïAnd the following messages are shown by the guest OS. >>>>> >>>>> Switching to new root and running init. >>>>> unmounting old /dev >>>>> unmounting old /proc >>>>> unmounting old /sys >>>>> >>>>> ï *************************************************************** >>>>> ï *************************************************************** >>>>> ï ** WARNING: Currently emulating unsupported memory accesses ï** >>>>> ï ** ï ï ï ï ïin /lib/tls glibc libraries. The emulation is ï ï** >>>>> ï ** ï ï ï ï ïslow. To ensure full performance you should ï ï ï** >>>>> ï ** ï ï ï ï ïinstall a 'xen-friendly' (nosegneg) version of ï ** >>>>> ï ** ï ï ï ï ïthe library, or disable tls support by executing ** >>>>> ï ** ï ï ï ï ïthe following as root: ï ï ï ï ï ï ï ï ï ï ï ï ï ** >>>>> ï ** ï ï ï ï ïmv /lib/tls /lib/tls.disabled ï ï ï ï ï ï ï ï ï ï** >>>>> ï ** Offending process: modprobe (pid=761) ï ï ï ï ï ï ï ï ï ï ** >>>>> ï *************************************************************** >>>>> ï *************************************************************** >>>>> >>>>> Pausing... 5<3>BUG: soft lockup detected on CPU#0! >>>>> ï[<c0151205>] softlockup_tick+0xa5/0xd0 >>>>> ï[<c010978a>] timer_interrupt+0x2fa/0x6c0 >>>>> ï[<c011d8c1>] __activate_task+0x21/0x40 >>>>> ï[<c012fed0>] lock_timer_base+0x20/0x50 >>>>> ï[<c0151563>] handle_IRQ_event+0x33/0xa0 >>>>> ï[<c0151678>] __do_IRQ+0xa8/0x120 >>>>> ï[<c01076e1>] do_IRQ+0x31/0x80 >>>>> ï[<c02af6b0>] neigh_periodic_timer+0x0/0x140 >>>>> ï[<c024ced5>] evtchn_do_upcall+0xe5/0x1f0 >>>>> ï[<c0115fb0>] do_fixup_4gb_segment+0x0/0x170 >>>>> ï[<c0105ba3>] hypervisor_callback+0x33/0x3b >>>>> ï[<c0115fb0>] do_fixup_4gb_segment+0x0/0x170 >>>>> ï[<c01ed68b>] delay_tsc+0xb/0x20 >>>>> ï[<c01ed6d6>] __delay+0x6/0x10 >>>>> ï[<c01160f0>] do_fixup_4gb_segment+0x140/0x170 >>>>> ï[<c0169597>] do_munmap+0x197/0x200 >>>>> ï[<c01ee0a4>] copy_to_user+0x34/0x70 >>>>> ï[<c0105b6b>] error_code+0x2b/0x30 >>>>> Continuing... >>>>> >>>>> >>>>> FYI, when I reverted changeset 20122 of xen-unstable, the guest OS >>>>> is booted up as before. >>>>> >>>>> Best regards, >>>>> ïKan >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> Xen-devel mailing list >>>>> Xen-devel@xxxxxxxxxxxxxxxxxxx >>>>> http://lists.xensource.com/xen-devel >>>> >>>> >>>> >>>> _______________________________________________ >>>> Xen-devel mailing list >>>> Xen-devel@xxxxxxxxxxxxxxxxxxx >>>> http://lists.xensource.com/xen-devel >>>> >>> >>>-------------------------------text/plain------------------------------- >>>_______________________________________________ >>>Xen-devel mailing list >>>Xen-devel@xxxxxxxxxxxxxxxxxxx >>>http://lists.xensource.com/xen-devel >> >> >>_______________________________________________ >>Xen-devel mailing list >>Xen-devel@xxxxxxxxxxxxxxxxxxx >>http://lists.xensource.com/xen-devel > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
|
 |
Lists.xenproject.org is hosted with RackSpace, monitoring our |