Commit dbf42848 authored by Jacob Keller's avatar Jacob Keller Committed by Jeff Kirsher

fm10k: change default Tx ITR to 25usec

The current default ITR for Tx is overly restrictive. Using a simple
netperf TCP_STREAM test, we top out at about 10Gb/s for a single thread
when running using 1500 byte frames. By reducing the ITR value to 25usec
(up to 40K interrupts a second from 10K), we are able to achieve 36Gb/s
for a single thread TCP stream test.
Signed-off-by: default avatarJacob Keller <jacob.e.keller@intel.com>
Tested-by: default avatarKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 436ea956
...@@ -171,11 +171,12 @@ struct fm10k_ring_container { ...@@ -171,11 +171,12 @@ struct fm10k_ring_container {
#define FM10K_ITR_MAX 0x0FFF /* maximum value for ITR */ #define FM10K_ITR_MAX 0x0FFF /* maximum value for ITR */
#define FM10K_ITR_10K 100 /* 100us */ #define FM10K_ITR_10K 100 /* 100us */
#define FM10K_ITR_20K 50 /* 50us */ #define FM10K_ITR_20K 50 /* 50us */
#define FM10K_ITR_40K 25 /* 25us */
#define FM10K_ITR_ADAPTIVE 0x8000 /* adaptive interrupt moderation flag */ #define FM10K_ITR_ADAPTIVE 0x8000 /* adaptive interrupt moderation flag */
#define ITR_IS_ADAPTIVE(itr) (!!(itr & FM10K_ITR_ADAPTIVE)) #define ITR_IS_ADAPTIVE(itr) (!!(itr & FM10K_ITR_ADAPTIVE))
#define FM10K_TX_ITR_DEFAULT FM10K_ITR_10K #define FM10K_TX_ITR_DEFAULT FM10K_ITR_40K
#define FM10K_RX_ITR_DEFAULT FM10K_ITR_20K #define FM10K_RX_ITR_DEFAULT FM10K_ITR_20K
#define FM10K_ITR_ENABLE (FM10K_ITR_AUTOMASK | FM10K_ITR_MASK_CLEAR) #define FM10K_ITR_ENABLE (FM10K_ITR_AUTOMASK | FM10K_ITR_MASK_CLEAR)
......
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