On Fri, Feb 10, 2017 at 2:27 PM, Eric Dumazet <[email protected]> wrote: > From: Eric Dumazet <[email protected]> > > All rx and rx netdev interrupts are handled by respectively > by mlx4_en_rx_irq() and mlx4_en_tx_irq() which simply schedule a NAPI. > > But mlx4_eq_int() also fires a tasklet to service all items that were > queued via mlx4_add_cq_to_tasklet(), but this handler was not called > unless user cqe was handled. > > This is very confusing, as "mpstat -I SCPU ..." show huge number of > tasklet invocations. > > This patch saves this overhead, by carefully firing the tasklet directly > from mlx4_add_cq_to_tasklet(), removing four atomic operations per IRQ. > > Signed-off-by: Eric Dumazet <[email protected]> > Cc: Tariq Toukan <[email protected]> > Cc: Saeed Mahameed <[email protected]>
Acked-by: Saeed Mahameed <[email protected]>
