From: David van Moolenbroek <david@minix3.org>
Date: Thu, 16 Dec 2010 09:46:26 +0000 (+0000)
Subject: Kernel: statistical profiling fixes
X-Git-Tag: v3.2.0~713
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/man.rndc.html?a=commitdiff_plain;h=b6f3b7e7f662276af0e1cf4e380e7d95083d6eea;p=minix.git

Kernel: statistical profiling fixes

- create name entries for forked processes as well;
- create name entries only for system processes.
---

diff --git a/kernel/profile.c b/kernel/profile.c
index 73f79bd46..4eed04c24 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -101,18 +101,19 @@ PRIVATE void profile_sample(struct proc * p, void * pc)
 	return;
   }
 
-  if (!(p->p_misc_flags & MF_SPROF_SEEN)) {
-	  p->p_misc_flags |= MF_SPROF_SEEN;
-	  sprof_save_proc(p);
-  }
-
   /* Runnable system process? */
   if (p->p_endpoint == IDLE)
-	  sprof_info.idle_samples++;
+	sprof_info.idle_samples++;
   else if (p->p_endpoint == KERNEL ||
-		  (priv(p)->s_flags & SYS_PROC && proc_is_runnable(p))) {
-	  sprof_save_sample(p, pc);
-	  sprof_info.system_samples++;
+		(priv(p)->s_flags & SYS_PROC && proc_is_runnable(p))) {
+
+	if (!(p->p_misc_flags & MF_SPROF_SEEN)) {
+		p->p_misc_flags |= MF_SPROF_SEEN;
+		sprof_save_proc(p);
+	}
+
+	sprof_save_sample(p, pc);
+	sprof_info.system_samples++;
   } else {
 	/* User process. */
 	sprof_info.user_samples++;
diff --git a/kernel/system/do_fork.c b/kernel/system/do_fork.c
index 12c1610f9..631252a6b 100644
--- a/kernel/system/do_fork.c
+++ b/kernel/system/do_fork.c
@@ -79,7 +79,8 @@ PUBLIC int do_fork(struct proc * caller, message * m_ptr)
   rpc->p_sys_time = 0;
 
   rpc->p_reg.psw &= ~TRACEBIT;		/* clear trace bit */
-  rpc->p_misc_flags &= ~(MF_VIRT_TIMER | MF_PROF_TIMER | MF_SC_TRACE);
+  rpc->p_misc_flags &=
+	~(MF_VIRT_TIMER | MF_PROF_TIMER | MF_SC_TRACE | MF_SPROF_SEEN);
   rpc->p_virt_left = 0;		/* disable, clear the process-virtual timers */
   rpc->p_prof_left = 0;