Date: Tue, 10 Feb 2009 11:30:50 -0800 From: Kip Macy <kmacy@freebsd.org> To: Kai Mosebach <xen@komadev.de> Cc: freebsd-xen <freebsd-xen@freebsd.org> Subject: Re: domU page faults under heavy network load Message-ID: <3c1674c90902101130r58c05f07we473c0897fe29481@mail.gmail.com> In-Reply-To: <13732317.41351234281573360.JavaMail.root@zim.freshx.de> References: <17604735.41331234281418189.JavaMail.root@zim.freshx.de> <13732317.41351234281573360.JavaMail.root@zim.freshx.de>
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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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