Hi, Am 16.02.2015 um 13:24 schrieb Paolo Bonzini: > > > On 15/02/2015 19:46, Stefan Priebe wrote: >> >> while i get a constant random 4k i/o write speed of 20.000 iops with >> qemu 2.1.0 or 2.1.3. I get jumping speeds with qemu 2.2 (jumping between >> 500 iops and 15.000 iop/s). >> >> If i use virtio instead of virtio-scsi speed is the same between 2.2 and >> 2.1. > > http://wiki.qemu.org/Contribute/ReportABug > > What is your command line? > > Paolo >
Could it be that this is a results of compiling qemu with --enable-debug to get debugging symbols? Stefan
