diff options
| author |   Jacob Keller <jacob.e.keller@intel.com> | 2015-10-16 10:57:07 -0700 |
|---|---|---|
| committer |   Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2015-12-05 23:55:21 -0800 |
| commit | 242722dd3d0af32703d4ebb4af63c92a2c85b835 (patch) | |
| tree | 06f5ed4c9c00a650a7006cbf84d055a10e01182c /drivers/net/ethernet/intel/fm10k/fm10k_pci.c | |
| parent | fm10k: introduce ITR_IS_ADAPTIVE macro (diff) | |
| download | linux-dev-242722dd3d0af32703d4ebb4af63c92a2c85b835.tar.xz linux-dev-242722dd3d0af32703d4ebb4af63c92a2c85b835.zip | |
fm10k: Update adaptive ITR algorithm
The existing adaptive ITR algorithm is overly restrictive. It throttles
incorrectly for various traffic rates, and does not produce good
performance. The algorithm now allows for more interrupts per second,
and does some calculation to help improve for smaller packet loads. In
addition, take into account the new itr_scale from the hardware which
indicates how much to scale due to PCIe link speed.
Reported-by: Matthew Vick <matthew.vick@intel.com>
Reported-by: Alex Duyck <alexander.duyck@gmail.com>
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>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k_pci.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c index faf81492d009..1f0d9bc3bf7b 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c @@ -880,7 +880,8 @@ static irqreturn_t fm10k_msix_mbx_vf(int __always_unused irq, void *data) /* re-enable mailbox interrupt and indicate 20us delay */ fm10k_write_reg(hw, FM10K_VFITR(FM10K_MBX_VECTOR), - FM10K_ITR_ENABLE | FM10K_MBX_INT_DELAY); + FM10K_ITR_ENABLE | (FM10K_MBX_INT_DELAY >> + hw->mac.itr_scale)); /* service upstream mailbox */ if (fm10k_mbx_trylock(interface)) { @@ -1111,7 +1112,8 @@ static irqreturn_t fm10k_msix_mbx_pf(int __always_unused irq, void *data) /* re-enable mailbox interrupt and indicate 20us delay */ fm10k_write_reg(hw, FM10K_ITR(FM10K_MBX_VECTOR), - FM10K_ITR_ENABLE | FM10K_MBX_INT_DELAY); + FM10K_ITR_ENABLE | (FM10K_MBX_INT_DELAY >> + hw->mac.itr_scale)); return IRQ_HANDLED; } |