Date: Tue, 10 Feb 2009 20:40:05 +0100 From: Kai Mosebach <kai@freshx.de> To: Kip Macy <kmacy@freebsd.org>, Kai Mosebach <xen@komadev.de> Cc: freebsd-xen <freebsd-xen@freebsd.org> Subject: Re: domU page faults under heavy network load Message-ID: <C5B796A5.3A80%kai@freshx.de> In-Reply-To: <3c1674c90902101130r58c05f07we473c0897fe29481@mail.gmail.com>
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1024meg On 2/10/09 8:30 PM, "Kip Macy" <kmacy@freebsd.org> wrote: > How big is the memory allocation to the VM? > > Thanks, > Kip > > > On Tue, Feb 10, 2009 at 7:59 AM, Kai Mosebach <xen@komadev.de> wrote: >> Hi, >> >> running r188436M on Xen3.3.1 (Centos5, x86_64). The reason is not to clear >> but seems related to heavy load on pipes + memory + network? >> It is repeatable with : >> >> bsd8# dd if=/dev/zero | nc otherhost 12345 >> >> Fatal trap 12: page fault while in kernel mode >> cpuid = 0; apic id = 00 >> fault virtual address = 0xd216dd00 >> fault code = supervisor read, page not present >> instruction pointer = 0x21:0xc02e4d40 >> stack pointer = 0x29:0xc332aba8 >> frame pointer = 0x29:0xc332abfc >> code segment = base 0x0, limit 0xfffff, type 0x1b >> = DPL 1, pres 1, def32 1, gran 1 >> processor eflags = interrupt enabled, resume, IOPL = 0 >> current process = 12 (irq137: xn) >> [thread pid 12 tid 100025 ] >> Stopped at xlvbd_add+0x2f70: movl 0x900(%edx,%eax,4),%edx >> db> bt >> <console hangs> >> >> >> On otherhost i get some stuff (between 19 and 62 MB), after nc closes down >> eventually >> >> otherhost# nc -l 12345 | cpipe -vt -b 65535 >/dev/null >> ... >> thru: 108930.791ms at 184.3kB/s ( 184.3kB/s avg) 19.6MB >> >> best Kai >> _______________________________________________ >> freebsd-xen@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-xen >> To unsubscribe, send any mail to "freebsd-xen-unsubscribe@freebsd.org" >>
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