From: Eli Cohen <eli@mellanox.com>
Date: Wed, 8 Aug 2018 16:23:53 -0700
Subject: net/mlx5: Reduce command polling interval
Patch-mainline: v4.19-rc1
Git-commit: 269d26f47f6f7d4275b0e225c9ee80cf4a31aa8c
References: bsc#1103990 FATE#326006
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@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- 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
ent->ret = 0;
return;
}
- usleep_range(5000, 10000);
+ cond_resched();
} while (time_before(jiffies, poll_end));
ent->ret = -ETIMEDOUT;