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Date: Wed, 8 Aug 2018 16:23:53 -0700
From: Saeed Mahameed <saeedm@...lanox.com>
To: netdev@...r.kernel.org, linux-rdma@...r.kernel.org
Cc: Leon Romanovsky <leonro@...lanox.com>,
Jason Gunthorpe <jgg@...lanox.com>,
"David S. Miller" <davem@...emloft.net>,
Doug Ledford <dledford@...hat.com>,
Eli Cohen <eli@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>
Subject: [PATCH mlx5-next 6/6] net/mlx5: Reduce command polling interval
From: Eli Cohen <eli@...lanox.com>
Use cond_resched() instead of usleep_range() to decrease the time
between polling attempts thus reducing overall driver load time.
Below is a comparison before and after the change, of loading eight
virtual functions.
Before:
real 0m8.785s
user 0m0.093s
sys 0m0.090s
After:
real 0m5.730s
user 0m0.097s
sys 0m0.087s
Signed-off-by: Eli Cohen <eli@...lanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
index 041c18faea46..fac5dd04578c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
@@ -211,7 +211,7 @@ static void poll_timeout(struct mlx5_cmd_work_ent *ent)
ent->ret = 0;
return;
}
- usleep_range(5000, 10000);
+ cond_resched();
} while (time_before(jiffies, poll_end));
ent->ret = -ETIMEDOUT;
--
2.17.0
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