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authorStephen Hemminger <shemminger@vyatta.com>2009-08-27 13:55:15 +0000
committerDavid S. Miller <davem@davemloft.net>2009-08-28 23:32:09 -0700
commit5c9d191c166233e723e632e79bcca2127a5fece9 (patch)
tree425324ef55119bb7420b4ab199e0a0821a3f157b /net/core/pktgen.c
parent5b8db2f568c4ee2a436f0e1c1416153e2878f869 (diff)
downloadblackbird-op-linux-5c9d191c166233e723e632e79bcca2127a5fece9.tar.gz
blackbird-op-linux-5c9d191c166233e723e632e79bcca2127a5fece9.zip
pktgen: avoid calling gettimeofday
If not using delay then no need to update next_tx after each packet sent. This allows pktgen to send faster especially on systems with slower clock sources. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/pktgen.c')
-rw-r--r--net/core/pktgen.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index bce9bf4b4a62..b7302e18764a 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3450,15 +3450,17 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
pkt_dev->last_ok = 0;
}
- pkt_dev->next_tx_us = getCurUs();
- pkt_dev->next_tx_ns = 0;
+ if (pkt_dev->delay_us || pkt_dev->delay_ns) {
+ pkt_dev->next_tx_us = getCurUs();
+ pkt_dev->next_tx_ns = 0;
- pkt_dev->next_tx_us += pkt_dev->delay_us;
- pkt_dev->next_tx_ns += pkt_dev->delay_ns;
+ pkt_dev->next_tx_us += pkt_dev->delay_us;
+ pkt_dev->next_tx_ns += pkt_dev->delay_ns;
- if (pkt_dev->next_tx_ns > 1000) {
- pkt_dev->next_tx_us++;
- pkt_dev->next_tx_ns -= 1000;
+ if (pkt_dev->next_tx_ns > 1000) {
+ pkt_dev->next_tx_us++;
+ pkt_dev->next_tx_ns -= 1000;
+ }
}
}
__netif_tx_unlock_bh(txq);
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