pktgen: Fix accuracy of inter-packet delay.

danieltt · davem330 · commit 07a0f0f07a68 · 2010-06-10T23:08:11.000-07:00
This patch correct a bug in the delay of pktgen. 
It makes sure the inter-packet interval is accurate.

Signed-off-by: Daniel Turull &lt;daniel.turull@gmail.com&gt;
Signed-off-by: Robert Olsson &lt;robert.olsson@its.uu.se&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
@@ -2170,7 +2170,7 @@ static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
 	end_time = ktime_now();
 
 	pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
-	pkt_dev->next_tx = ktime_add_ns(end_time, pkt_dev->delay);
+	pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
 }
 
 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)

Original file line number	Diff line number	Diff line change
`@@ -2170,7 +2170,7 @@ static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)`
`2170`	`2170`	`end_time = ktime_now();`
`2171`	`2171`
`2172`	`2172`	`pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));`
`2173`		`- pkt_dev->next_tx = ktime_add_ns(end_time, pkt_dev->delay);`
	`2173`	`+ pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);`
`2174`	`2174`	`}`
`2175`	`2175`
`2176`	`2176`	`static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)`