diff options
| author | Moni Shoua <monis@mellanox.com> | 2018-11-08 22:10:14 +0300 |
|---|---|---|
| committer | Leon Romanovsky <leonro@mellanox.com> | 2018-11-12 23:21:32 +0300 |
| commit | 90290db7669ba680b37b7006cbf6e5cee6cba779 (patch) | |
| tree | 965dfff83ddbd12c483690ab305a1466e7b80fbe | |
| parent | ef90c5e9757d5abc80b947cbcaacc43d1e916488 (diff) | |
| download | linux-90290db7669ba680b37b7006cbf6e5cee6cba779.tar.xz | |
net/mlx5: Use multi threaded workqueue for page fault handling
Page fault events are processed in a workqueue context. Since each QP
can have up to two concurrent unrelated page-faults, one for requester
and one for responder, page-fault handling can be done in parallel.
Achieve this by changing the workqueue to be multi-threaded.
The number of threads is the same as the number of command interface
channels to avoid command interface bottlenecks.
In addition to multi-threads, change the workqueue flags to give it high
priority.
Stress benchmark shows that before this change 85% of page faults were
waiting in queue 8 seconds or more while after the change 98% of page
faults were waiting in queue 64 milliseconds or less. The number of threads
was chosen as the number of channels to the command interface.
Fixes: d9aaed838765 ("{net,IB}/mlx5: Refactor page fault handling")
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/eq.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c index c1e1a16a9b07..aeab0c4f60f4 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c @@ -356,8 +356,9 @@ static int init_pf_ctx(struct mlx5_eq_pagefault *pf_ctx, const char *name) spin_lock_init(&pf_ctx->lock); INIT_WORK(&pf_ctx->work, eq_pf_action); - pf_ctx->wq = alloc_ordered_workqueue(name, - WQ_MEM_RECLAIM); + pf_ctx->wq = alloc_workqueue(name, + WQ_HIGHPRI | WQ_UNBOUND | WQ_MEM_RECLAIM, + MLX5_NUM_CMD_EQE); if (!pf_ctx->wq) return -ENOMEM; |