Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-06 05:02:31 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

net: aquantia: Bad udp rate on default interrupt coalescing

Browse Source 
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>
This commit is contained in:
Igor Russkikh 2017-10-19 18:23:59 +03:00 committed by David S. Miller
parent b82ee71a86
commit 417a3ae4b1
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
View File

@ -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] = {