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authorIgor Russkikh <igor.russkikh@aquantia.com>2017-10-19 18:23:59 +0300
committerDavid S. Miller <davem@davemloft.net>2017-10-21 12:32:24 +0100
commit417a3ae4b14909439bb49790f90201f450399845 (patch)
tree56acdbb7c39d20a7d56e4b881b6e4c7bc6933e96 /drivers
parentb82ee71a86b0ea66da79a91959d800ffb696a5cb (diff)
net: aquantia: Bad udp rate on default interrupt coalescing
Default Tx rates cause very long ISR delays on Tx. 0xff is 510us delay, giving only ~ 2000 interrupts per seconds for Tx rings cleanup. With these settings udp tx rate was never higher than ~800Mbps on a single stream. Changing min delay to 0xF makes it way better with ~6Gbps TCP stream performance is almost unaffected by this change, since LSO optimizations play important role. CPU load is affected insignificantly by this change. Signed-off-by: Pavel Belous <pavel.belous@aquantia.com> Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
index 11f7e71bf448..ec68c20efcbd 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
@@ -821,12 +821,12 @@ static int hw_atl_b0_hw_interrupt_moderation_set(struct aq_hw_s *self)
itr_rx |= rx_max_timer << 0x10U;
} else {
static unsigned int hw_atl_b0_timers_table_tx_[][2] = {
- {0xffU, 0xffU}, /* 10Gbit */
- {0xffU, 0x1ffU}, /* 5Gbit */
- {0xffU, 0x1ffU}, /* 5Gbit 5GS */
- {0xffU, 0x1ffU}, /* 2.5Gbit */
- {0xffU, 0x1ffU}, /* 1Gbit */
- {0xffU, 0x1ffU}, /* 100Mbit */
+ {0xfU, 0xffU}, /* 10Gbit */
+ {0xfU, 0x1ffU}, /* 5Gbit */
+ {0xfU, 0x1ffU}, /* 5Gbit 5GS */
+ {0xfU, 0x1ffU}, /* 2.5Gbit */
+ {0xfU, 0x1ffU}, /* 1Gbit */
+ {0xfU, 0x1ffU}, /* 100Mbit */
};
static unsigned int hw_atl_b0_timers_table_rx_[][2] = {

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