--- 2.6/drivers/net/forcedeth.c	2004-12-05 16:21:28.000000000 +0100
+++ build-2.6/drivers/net/forcedeth.c	2004-12-05 19:18:24.000000000 +0100
@@ -1500,6 +1500,131 @@
 	enable_irq(dev->irq);
 }
 
+int p_shift = 0;
+
+#define STAT_TABLELEN		16384
+static unsigned long totals[STAT_TABLELEN];
+static unsigned int overflows;
+
+static unsigned long long stime;
+static void start_measure(void)
+{
+	 __asm__ __volatile__ (
+		".align 64\n\t"
+	 	"pushal\n\t"
+		"cpuid\n\t"
+		"popal\n\t"
+		"rdtsc\n\t"
+		"movl %%eax,(%0)\n\t"
+		"movl %%edx,4(%0)\n\t"
+		: /* no output */
+		: "c"(&stime)
+		: "eax", "edx", "memory" );
+}
+
+static void end_measure(void)
+{
+static unsigned long long etime;
+	__asm__ __volatile__ (
+		"pushal\n\t"
+		"cpuid\n\t"
+		"popal\n\t"
+		"rdtsc\n\t"
+		"movl %%eax,(%0)\n\t"
+		"movl %%edx,4(%0)\n\t"
+		: /* no output */
+		: "c"(&etime)
+		: "eax", "edx", "memory" );
+	{
+		unsigned long time = (unsigned long)(etime-stime);
+		time >>= p_shift;
+		if(time < STAT_TABLELEN) {
+			totals[time]++;
+		} else {
+			overflows++;
+		}
+	}
+}
+
+static void clean_buf(void)
+{
+	memset(totals,0,sizeof(totals));
+	overflows = 0;
+}
+
+static void print_line(unsigned long* array)
+{
+	int i;
+	for(i=0;i<32;i++) {
+		if((i%32)==16)
+			printk(":");
+		printk("%lx ",array[i]); 
+	}
+}
+
+static void print_buf(char* caption)
+{
+	int i, other = 0;
+	printk("Results - %s - shift %d",
+		caption, p_shift);
+
+	for(i=0;i<STAT_TABLELEN;i+=32) {
+		int j;
+		int local = 0;
+		for(j=0;j<32;j++)
+			local += totals[i+j];
+
+		if(local) {
+			printk("\n%3x: ",i);
+			print_line(&totals[i]);
+			other += local;
+		}
+	}
+	printk("\nOverflows: %d.\n",
+		overflows);
+	printk("Sum: %d\n",other+overflows);
+}
+
+static void return_immediately(void *dummy)
+{
+}
+
+static void bench_readl(u8 __iomem *base)
+{ 
+	int i;
+
+	/* empty test measurement: */
+	printk("******** kernel cpu benchmark started **********\n");
+	clean_buf();
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	schedule_timeout(200);
+	for(i=0;i<100;i++) {
+		start_measure();
+		return_immediately(NULL);
+		return_immediately(NULL);
+		return_immediately(NULL);
+		return_immediately(NULL);
+		end_measure();
+	}
+	print_buf("zero");
+	clean_buf();
+
+	printk("** reading register %p\n", base);
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	schedule_timeout(200);
+	for(i=0;i<100;i++) {
+		start_measure();
+		return_immediately(NULL);
+		return_immediately(NULL);
+		readl(base);
+		return_immediately(NULL);
+		return_immediately(NULL);
+		end_measure();
+	}
+	print_buf("readl");
+	clean_buf();
+}
+
 static int nv_open(struct net_device *dev)
 {
 	struct fe_priv *np = get_nvpriv(dev);
@@ -1635,6 +1760,8 @@
 		mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
 	spin_unlock_irq(&np->lock);
 
+	bench_readl(base + NvRegMulticastAddrB);
+	bench_readl(base + NvRegIrqStatus);
 	return 0;
 out_drain:
 	drain_ring(dev);