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

[Alon Levy]

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):

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
> 
>