Re: Awful FreeBSD 9 block IO performance in KVM

2012-07-21 Thread Wojciech Puchar
da0: Fixed Direct Access SCSI-5 device da0: 3.300MB/s transfers da0: Command Queueing enabled da0: 409600MB (838860800 512 byte sectors: 255H 63S/T 52216C) It does not explain why virtio is slow though, although I still need to test virtio against the latest code. I will do ivan's raw block test

Fwd: kern/170058: [cbb] cardbus slot is not functioning correctly after a resume

2012-07-21 Thread Adrian Chadd
Hi all, I found this in stable/9. I think it's also a problem in -HEAD. Would someone with PCI bus clue take a look ? Thanks! Adrian -- Forwarded message -- From: Date: 21 July 2012 16:50 Subject: Re: kern/170058: [cbb] cardbus slot is not functioning correctly after a resu

Re: Awful FreeBSD 9 block IO performance in KVM

2012-07-21 Thread Richard Yao
On 07/21/2012 04:15 AM, Wojciech Puchar wrote: >> da0: Fixed Direct Access SCSI-5 device >> da0: 3.300MB/s transfers >> da0: Command Queueing enabled >> da0: 409600MB (838860800 512 byte sectors: 255H 63S/T 52216C) >> >> It does not explain why virtio is slow though, although I still need to >> te

Re: kern/170058: [cbb] cardbus slot is not functioning correctly after a resume

2012-07-21 Thread Warner Losh
On Jul 21, 2012, at 5:50 PM, Adrian Chadd wrote: > Hi all, > > I found this in stable/9. I think it's also a problem in -HEAD. > > Would someone with PCI bus clue take a look ? I'll be happy to look at it... just as soon as I get a laptop that suspends/resumes with a cardbus slot to test it

Re: Awful FreeBSD 9 block IO performance in KVM

2012-07-21 Thread Dieter BSD
>>> da0: 3.300MB/s transfers >>> da0: Command Queueing enabled > > root@freebsd:/root # dd if=/dev/zero of=/dev/da1 bs=16384 count=262144 > > 4294967296 bytes transferred in 615.840721 secs (6974153 bytes/sec) 1) Does a larger block size (bs=1m) help? 2) That's roughly the speed I'd expect withou