diff options
| author | Ben Hutchings <bhutchings@solarflare.com> | 2009-03-20 13:30:37 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-03-21 19:06:58 -0700 |
| commit | 6fb70fd1b57707a5c7b9fb167b7790b2cba13f04 (patch) | |
| tree | 311192bd4de07e1da571f1a6ac6a3ad123ab3f50 /drivers/net/sfc/net_driver.h | |
| parent | 85451a951b9511605475fadcc0a8d3aeccefded8 (diff) | |
sfc: Implement adaptive IRQ moderation
Calculate a score for each 1000 IRQs:
- TX completions are worth 1 point
- RX completions are worth 4 if merged using LRO or 2 otherwise
Reduce moderation if the score is less than 10000, down to a minimum
of 5 us. Increase moderation if the score is more than 20000, up to
the specified maximum.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/sfc/net_driver.h')
| -rw-r--r-- | drivers/net/sfc/net_driver.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h index b81fc727dff..e169e5dcd1e 100644 --- a/drivers/net/sfc/net_driver.h +++ b/drivers/net/sfc/net_driver.h @@ -336,6 +336,8 @@ enum efx_rx_alloc_method { * @eventq_read_ptr: Event queue read pointer * @last_eventq_read_ptr: Last event queue read pointer value. * @eventq_magic: Event queue magic value for driver-generated test events + * @irq_count: Number of IRQs since last adaptive moderation decision + * @irq_mod_score: IRQ moderation score * @rx_alloc_level: Watermark based heuristic counter for pushing descriptors * and diagnostic counters * @rx_alloc_push_pages: RX allocation method currently in use for pushing @@ -364,6 +366,9 @@ struct efx_channel { unsigned int last_eventq_read_ptr; unsigned int eventq_magic; + unsigned int irq_count; + unsigned int irq_mod_score; + int rx_alloc_level; int rx_alloc_push_pages; @@ -703,6 +708,8 @@ union efx_multicast_hash { * @membase: Memory BAR value * @biu_lock: BIU (bus interface unit) lock * @interrupt_mode: Interrupt mode + * @irq_rx_adaptive: Adaptive IRQ moderation enabled for RX event queues + * @irq_rx_moderation: IRQ moderation time for RX event queues * @i2c_adap: I2C adapter * @board_info: Board-level information * @state: Device state flag. Serialised by the rtnl_lock. @@ -784,6 +791,8 @@ struct efx_nic { void __iomem *membase; spinlock_t biu_lock; enum efx_int_mode interrupt_mode; + bool irq_rx_adaptive; + unsigned int irq_rx_moderation; struct i2c_adapter i2c_adap; struct efx_board board_info; |