From 413af27f9bb0695217ba9ad4e27b42bd12982a37 Mon Sep 17 00:00:00 2001
From: Simon Pickartz <pickartz@lfbs.rwth-aachen.de>
Date: Mon, 6 Jun 2011 23:29:00 -0700
Subject: [PATCH] add counter for mail_ping latency

---
 arch/x86/scc/icc.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/x86/scc/icc.c b/arch/x86/scc/icc.c
index 96ea623d..bf12483d 100644
--- a/arch/x86/scc/icc.c
+++ b/arch/x86/scc/icc.c
@@ -238,16 +238,22 @@ int icc_mail_ping( void )
 	kprintf( "#### Hello from icc_mail_ping\n" );	
 	// iRCCE is not thread save => disable interrupts
 	flags = irq_nested_disable();
-
+	
+	// start timer
+	uint64_t timer = rdtsc();
+	
 	// send mail
 	iRCCE_mail_send( 0, my_ue, 0, NULL, remote_rank );
-	kprintf( "### Message sent ...\n" );
 
 	// wait for mail from remote rank
 	iRCCE_MAIL_HEADER* mail;
 	do {
 		iRCCE_mail_recv( &mail );
 	} while( !mail );
+	
+	timer = timer - rdtsc();	
+	
+	kprintf( "Received mail in %d ticks!\n", timer );
 
 	// show content	
 	iRCCE_mailbox_print_header( mail );