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| author |   Jacob Keller <jacob.e.keller@intel.com> | 2015-10-16 10:57:09 -0700 |
|---|---|---|
| committer |   Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2015-12-05 23:55:23 -0800 |
| commit | dbf4284886c59a17dc0081cee39039ac2a546078 (patch) | |
| tree | 10397a57e56fb0b32f49335270b817dae4368a10 | |
| parent | fm10k: use macro for default Tx and Rx ITR values (diff) | |
| download | linux-dev-dbf4284886c59a17dc0081cee39039ac2a546078.tar.xz linux-dev-dbf4284886c59a17dc0081cee39039ac2a546078.zip | |
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: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| -rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k.h b/drivers/net/ethernet/intel/fm10k/fm10k.h index 115033f6539e..fa26e20445a5 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k.h +++ b/drivers/net/ethernet/intel/fm10k/fm10k.h @@ -171,11 +171,12 @@ struct fm10k_ring_container { #define FM10K_ITR_MAX 0x0FFF /* maximum value for ITR */ #define FM10K_ITR_10K 100 /* 100us */ #define FM10K_ITR_20K 50 /* 50us */ +#define FM10K_ITR_40K 25 /* 25us */ #define FM10K_ITR_ADAPTIVE 0x8000 /* adaptive interrupt moderation flag */ #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_ITR_ENABLE (FM10K_ITR_AUTOMASK | FM10K_ITR_MASK_CLEAR) |