Re: Tracing block devices (was: Re: [Qemu-devel] Static tracepoint control via trace-event)

2010-10-21 Thread Daniel P. Berrange
On Tue, Oct 19, 2010 at 03:29:51PM +0100, Richard W.M. Jones wrote: > On Tue, Oct 19, 2010 at 03:59:36PM +0200, Jan Kiszka wrote: > > Once we have "-trace events=...", defining the list of active > > tracepoints before starting qemu will be trivial (e.g. via a config > > file). Of course, this requ

Re: Tracing block devices (was: Re: [Qemu-devel] Static tracepoint control via trace-event)

2010-10-21 Thread Stefan Hajnoczi
On Thu, Oct 21, 2010 at 6:20 AM, Christoph Hellwig wrote: > On Tue, Oct 19, 2010 at 03:29:51PM +0100, Richard W.M. Jones wrote: >> On Tue, Oct 19, 2010 at 03:59:36PM +0200, Jan Kiszka wrote: >> > Once we have "-trace events=...", defining the list of active >> > tracepoints before starting qemu wi

Re: Tracing block devices (was: Re: [Qemu-devel] Static tracepoint control via trace-event)

2010-10-21 Thread Richard W.M. Jones
On Thu, Oct 21, 2010 at 07:20:27AM +0200, Christoph Hellwig wrote: > On Tue, Oct 19, 2010 at 03:29:51PM +0100, Richard W.M. Jones wrote: > > On Tue, Oct 19, 2010 at 03:59:36PM +0200, Jan Kiszka wrote: > > > Once we have "-trace events=...", defining the list of active > > > tracepoints before start

Re: Tracing block devices (was: Re: [Qemu-devel] Static tracepoint control via trace-event)

2010-10-20 Thread Christoph Hellwig
On Tue, Oct 19, 2010 at 03:29:51PM +0100, Richard W.M. Jones wrote: > On Tue, Oct 19, 2010 at 03:59:36PM +0200, Jan Kiszka wrote: > > Once we have "-trace events=...", defining the list of active > > tracepoints before starting qemu will be trivial (e.g. via a config > > file). Of course, this requ

Re: Tracing block devices (was: Re: [Qemu-devel] Static tracepoint control via trace-event)

2010-10-19 Thread Stefan Hajnoczi
On Tue, Oct 19, 2010 at 03:29:51PM +0100, Richard W.M. Jones wrote: > On Tue, Oct 19, 2010 at 03:59:36PM +0200, Jan Kiszka wrote: > > Once we have "-trace events=...", defining the list of active > > tracepoints before starting qemu will be trivial (e.g. via a config > > file). Of course, this requ

Tracing block devices (was: Re: [Qemu-devel] Static tracepoint control via trace-event)

2010-10-19 Thread Richard W.M. Jones
On Tue, Oct 19, 2010 at 03:59:36PM +0200, Jan Kiszka wrote: > Once we have "-trace events=...", defining the list of active > tracepoints before starting qemu will be trivial (e.g. via a config > file). Of course, this requires that all tracepoints are built-in... Sorry that I've not been followin

Re: [Qemu-devel] Static tracepoint control via trace-event

2010-10-19 Thread Jan Kiszka
Am 19.10.2010 15:52, Stefan Hajnoczi wrote: > On Tue, Oct 19, 2010 at 2:36 PM, Daniel P. Berrange > wrote: >> On Tue, Oct 19, 2010 at 03:08:08PM +0200, Jan Kiszka wrote: >>> Hi Stefan, >>> >>> just had a closer look at qemu's new tracing framework. Looks cool, >>> though it leaves a bit room for

Re: [Qemu-devel] Static tracepoint control via trace-event

2010-10-19 Thread Stefan Hajnoczi
On Tue, Oct 19, 2010 at 2:36 PM, Daniel P. Berrange wrote: > On Tue, Oct 19, 2010 at 03:08:08PM +0200, Jan Kiszka wrote: >> Hi Stefan, >> >> just had a closer look at qemu's new tracing framework. Looks cool, >> though it leaves a bit room for improvements. ;) >> >> One quirk I stumbled over quick

Re: [Qemu-devel] Static tracepoint control via trace-event

2010-10-19 Thread Daniel P. Berrange
On Tue, Oct 19, 2010 at 03:08:08PM +0200, Jan Kiszka wrote: > Hi Stefan, > > just had a closer look at qemu's new tracing framework. Looks cool, > though it leaves a bit room for improvements. ;) > > One quirk I stumbled over quickly was the "disable" tag in trace-events. > It confused me first a