Commit 417a3ae4 authored by Igor Russkikh's avatar Igor Russkikh Committed by David S. Miller

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: default avatarPavel Belous <pavel.belous@aquantia.com>
Signed-off-by: default avatarIgor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b82ee71a
...@@ -821,12 +821,12 @@ static int hw_atl_b0_hw_interrupt_moderation_set(struct aq_hw_s *self) ...@@ -821,12 +821,12 @@ static int hw_atl_b0_hw_interrupt_moderation_set(struct aq_hw_s *self)
itr_rx |= rx_max_timer << 0x10U; itr_rx |= rx_max_timer << 0x10U;
} else { } else {
static unsigned int hw_atl_b0_timers_table_tx_[][2] = { static unsigned int hw_atl_b0_timers_table_tx_[][2] = {
{0xffU, 0xffU}, /* 10Gbit */ {0xfU, 0xffU}, /* 10Gbit */
{0xffU, 0x1ffU}, /* 5Gbit */ {0xfU, 0x1ffU}, /* 5Gbit */
{0xffU, 0x1ffU}, /* 5Gbit 5GS */ {0xfU, 0x1ffU}, /* 5Gbit 5GS */
{0xffU, 0x1ffU}, /* 2.5Gbit */ {0xfU, 0x1ffU}, /* 2.5Gbit */
{0xffU, 0x1ffU}, /* 1Gbit */ {0xfU, 0x1ffU}, /* 1Gbit */
{0xffU, 0x1ffU}, /* 100Mbit */ {0xfU, 0x1ffU}, /* 100Mbit */
}; };
static unsigned int hw_atl_b0_timers_table_rx_[][2] = { static unsigned int hw_atl_b0_timers_table_rx_[][2] = {
......
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