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Date: Thu, 05 Mar 2015 10:41:34 -0800
From: Eric Dumazet <eric.dumazet@...il.com>
To: David Miller <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>,
Prashant Sreedharan <prashant@...adcom.com>,
Michael Chan <mchan@...adcom.com>
Subject: [PATCH net-next] tg3: use napi_complete_done()
From: Eric Dumazet <edumazet@...gle.com>
Using napi_complete_done() instead of napi_complete() allows
us to use /sys/class/net/ethX/gro_flush_timeout
GRO layer can aggregate more packets if the flush is delayed a bit,
without having to set too big coalescing parameters that impact
latencies.
Tested:
lpx:~# echo 0 >/sys/class/net/eth1/gro_flush_timeout
lpx:~# sar -n DEV 1 10 | grep eth1
10:36:25 AM eth1 81290.00 40617.00 120479.67 2777.01 0.00 0.00 0.00
10:36:26 AM eth1 81283.00 40608.00 120481.81 2778.13 0.00 0.00 1.00
10:36:27 AM eth1 81304.00 40639.00 120518.42 2778.28 0.00 0.00 0.00
10:36:28 AM eth1 81255.00 40605.00 120437.34 2775.95 0.00 0.00 1.00
10:36:29 AM eth1 81306.00 40630.00 120521.44 2777.70 0.00 0.00 0.00
10:36:30 AM eth1 81286.00 40564.00 120480.20 2773.31 0.00 0.00 0.00
10:36:31 AM eth1 81256.00 40599.00 120438.81 2776.27 0.00 0.00 0.00
10:36:32 AM eth1 81287.00 40594.00 120480.69 2776.69 0.00 0.00 0.00
10:36:33 AM eth1 81279.00 40601.00 120478.53 2775.84 0.00 0.00 0.00
10:36:34 AM eth1 81277.00 40610.00 120476.94 2776.25 0.00 0.00 0.00
Average: eth1 81282.30 40606.70 120479.39 2776.54 0.00 0.00 0.20
lpx:~# echo 13000 >/sys/class/net/eth1/gro_flush_timeout
lpx:~# sar -n DEV 1 10 | grep eth1
10:36:43 AM eth1 81257.00 7747.00 120437.44 530.00 0.00 0.00 0.00
10:36:44 AM eth1 81278.00 7748.00 120480.00 529.85 0.00 0.00 0.00
10:36:45 AM eth1 81282.00 7752.00 120479.09 531.09 0.00 0.00 0.00
10:36:46 AM eth1 81282.00 7751.00 120478.80 530.90 0.00 0.00 0.00
10:36:47 AM eth1 81276.00 7745.00 120478.31 529.64 0.00 0.00 0.00
10:36:48 AM eth1 81278.00 7747.00 120478.50 529.81 0.00 0.00 0.00
10:36:49 AM eth1 81282.00 7749.00 120478.88 530.01 0.00 0.00 0.00
10:36:50 AM eth1 81284.00 7751.00 120481.52 530.20 0.00 0.00 0.00
10:36:51 AM eth1 81299.00 7769.00 120481.74 533.81 0.00 0.00 0.00
10:36:52 AM eth1 81281.00 7748.00 120478.62 529.96 0.00 0.00 0.00
Average: eth1 81279.90 7750.70 120475.29 530.53 0.00 0.00 0.00
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
drivers/net/ethernet/broadcom/tg3.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 23a019cee279af1e502d05dc5f2363372d35b2ce..22b33da32ba46204beb1cb5fd7c725bfaa1dfc71 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -7244,7 +7244,7 @@ static int tg3_poll_msix(struct napi_struct *napi, int budget)
if (tnapi == &tp->napi[1] && tp->rx_refill)
continue;
- napi_complete(napi);
+ napi_complete_done(napi, work_done);
/* Reenable interrupts. */
tw32_mailbox(tnapi->int_mbox, tnapi->last_tag << 24);
@@ -7337,7 +7337,7 @@ static int tg3_poll(struct napi_struct *napi, int budget)
sblk->status &= ~SD_STATUS_UPDATED;
if (likely(!tg3_has_work(tnapi))) {
- napi_complete(napi);
+ napi_complete_done(napi, work_done);
tg3_int_reenable(tnapi);
break;
}
--
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