# HG changeset patch
# User yamahata@xxxxxxxxxxxxx
# Date 1197515834 -32400
# Node ID 45c190e23dab1b37da1490af90002e1367a856a5
# Parent  5445a8208b7c8bff114934c64f6d9338d943cd50
xenoprof: flush remaining smples when sampling is stopped.
Xenoprof notifies guest kernel via VIRQ_XENOPROF when sampled.
But it does coarsly based on heuristic so that sometimes VIRQ_XENOPROF
isn't delivered resulting in that oprofile daemon collects no sample.
To avoid that situation, always send VIRQ_XENOPROF when sampling is stopped.
PATCHNAME: xenoprof_flush_samples

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>

diff -r 5445a8208b7c -r 45c190e23dab xen/common/xenoprof.c
--- a/xen/common/xenoprof.c	Tue Dec 11 17:38:21 2007 +0900
+++ b/xen/common/xenoprof.c	Thu Dec 13 12:17:14 2007 +0900
@@ -12,6 +12,7 @@
 #ifndef COMPAT
 #include <xen/guest_access.h>
 #include <xen/sched.h>
+#include <xen/event.h> /* for send_guest_vcpu_virq() */
 #include <public/xenoprof.h>
 #include <xen/paging.h>
 #include <xsm/xsm.h>
@@ -747,14 +748,30 @@ int do_xenoprof_op(int op, XEN_GUEST_HAN
         break;
 
     case XENOPROF_stop:
+    {
+        int i;
         if ( xenoprof_state != XENOPROF_PROFILING )
         {
             ret = -EPERM;
             break;
         }
         xenoprof_arch_stop();
+
+        /* flush remaining samples */
+        for ( i = 0; i < adomains; i++ )
+        {
+            struct domain *d;
+            struct vcpu *v;
+
+            if ( !active_ready[i] )
+                continue;
+            d = active_domains[i];
+            for_each_vcpu(d, v)
+                send_guest_vcpu_virq(v, VIRQ_XENOPROF);
+        }
         xenoprof_state = XENOPROF_READY;
         break;
+    }
 
     case XENOPROF_disable_virq:
     {