Re: [Qemu-devel] [RFC] Add a stp file for usage from build directory

[Paolo Bonzini <pbonzini@redhat.com>]

Il 28/05/2013 14:33, Alon Levy ha scritto:
> On Tue, 2013-05-28 at 14:18 +0200, Paolo Bonzini wrote:
>> Il 28/05/2013 14:09, Alon Levy ha scritto:
>>>>> +		--probe-prefix=qemu.local \
>>>>
>>>> Why change the prefix?
>>>
>>> It was one way to verify I was using the correct file. I'll change it
>>> back.
>>>
>>> But in general does it make sense for you to have this in addition to
>>> the existing stp file?
>>
>> I think it does (with the same prefix so that you can share the
>> scripts).  But I'm not sure how you'd use it. :)  Can you show an
>> example and also put it in the commit message?
> 
> I though it would be useful to have a bunch of scripts for developers. I
> have the following (didn't fix yet to use the same prefix):

Ok, so it's just a matter of using the -I option to stap.  That's the
bit that has to be in the commit message.

Thanks!

Paolo

> diff --git a/scripts/stap-qxl-generic b/scripts/stap-qxl-generic
> new file mode 100755
> index 0000000..1c21911
> --- /dev/null
> +++ b/scripts/stap-qxl-generic
> @@ -0,0 +1,4 @@
> +#!/bin/bash -x
> +STP=$0.stp
> +ROOT=`dirname $0`/../
> +sudo stap -v -I $ROOT/x86_64-softmmu $STP
> diff --git a/scripts/stap-qxl-generic.stp b/scripts/stap-qxl-generic.stp
> new file mode 100644
> index 0000000..e201e69
> --- /dev/null
> +++ b/scripts/stap-qxl-generic.stp
> @@ -0,0 +1,24 @@
> +probe begin { printf("starting qxl generic probe\n") }
> +
> +global call, threads
> +
> +probe qemu.local.qxl* {
> +    //printf("%d: %s: %s\n", tid(), pp(), $$vars)
> +    //print_ubacktrace()
> +    call[tid(), probefunc()] <<< 1
> +    threads[tid()] <<< 1
> +}
> +
> +probe timer.s(%( $# > 0 %? $1 %: 5 %)) {
> +       ansi_clear_screen()
> +    printf("%10s %45s %s\n", "TID", "", "HITS");
> +    foreach([t] in threads-) {
> +        printf("%10d %45s %d\n", t, "", @count(threads[t]));
> +    }
> +       printf("%10s %45s %s\n",
> +                       "TID", "CALL", "HITS")
> +       foreach([tid, name] in call-) {
> +               printf("%10d %45s %d\n", tid, name,
> +                               @count(call[tid, name]))
> +       }
> +}
> 
> 
>>
>> Paolo
>>
>>
> 
>