[Qemu-devel] Re: [Tracing] More Trace events

[Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>]

On Wed, Aug 11, 2010 at 01:55:02PM +0530, Prerna Saxena wrote:
> This patch adds few more trace events for tracking IO and also to trace 
> balloon event flagged via the monitor.
> 
> Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com>
> ---

Thanks for adding these trace events.  Two minor requests:
1. Please split the patch into one patch that adds ioport tracing and
   one that adds virtio-balloon tracing.  If there is discussion related
   to one of these subsystems any follow up will be cleaner and only
   affect that commit.

> diff --git a/trace-events b/trace-events
> index 80197b6..cade0b5 100644
> --- a/trace-events
> +++ b/trace-events
> @@ -59,3 +59,11 @@ virtio_blk_handle_write(void *req, unsigned long sector, unsigned long nsectors)
> 
>  # posix-aio-compat.c
>  paio_submit(void *acb, void *opaque, unsigned long sector_num, unsigned long nb_sectors, unsigned long type) "acb %p opaque %p sector_num %lu nb_sectors %lu type %lu"
> +
> +# ioport.c
> +cpu_in(unsigned int addr, unsigned int val) "Addr %u Value %u"
> +cpu_out(unsigned int addr, unsigned int val) "Addr %u Value %u"
> +
> +# balloon.c
> +# Since requests are raised via monitor, not many tracepoints are needed.
> +balloon_event(void *opaque, unsigned long addr) "Opaque %p Addr %lu"

2. Please follow the lowercase format string convention.  All other
   trace events use lowercase "like %p this %u".

Thanks,
Stefan