Re: [PATCH net-next v4] mlx5/core: Schedule EQ comp tasklet only if necessary

[Jakub Kicinski]

On Tue,  5 Nov 2024 13:39:59 -0700 Caleb Sander Mateos wrote:
> Currently, the mlx5_eq_comp_int() interrupt handler schedules a tasklet
> to call mlx5_cq_tasklet_cb() if it processes any completions. For CQs
> whose completions don't need to be processed in tasklet context, this
> adds unnecessary overhead. In a heavy TCP workload, we see 4% of CPU
> time spent on the tasklet_trylock() in tasklet_action_common(), with a
> smaller amount spent on the atomic operations in tasklet_schedule(),
> tasklet_clear_sched(), and locking the spinlock in mlx5_cq_tasklet_cb().
> TCP completions are handled by mlx5e_completion_event(), which schedules
> NAPI to poll the queue, so they don't need tasklet processing.

Applied, thanks