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[for-next,9/9] mlx5_core: Change optimal_reclaimed_pages for better performance

Message ID 1382511201-7061-10-git-send-email-eli@mellanox.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Eli Cohen Oct. 23, 2013, 6:53 a.m. UTC 
From: Moshe Lazer <moshel@mellanox.com>

Change optimal_reclaimed_pages() to increase the output size of each reclaim
pages command. This change reduces significantly the amount of reclaim pages
commands issued to FW when the driver is unloaded which reduces the overall
driver unload time.

Signed-off-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
index 013aa42..ba816c2 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
@@ -454,14 +454,19 @@  int mlx5_satisfy_startup_pages(struct mlx5_core_dev *dev, int boot)
 	return give_pages(dev, func_id, npages, 0);
 }
 
+enum {
+	MLX5_BLKS_FOR_RECLAIM_PAGES = 12
+};
+
 static int optimal_reclaimed_pages(void)
 {
 	struct mlx5_cmd_prot_block *block;
 	struct mlx5_cmd_layout *lay;
 	int ret;
 
-	ret = (sizeof(lay->in) + sizeof(block->data) -
-	       sizeof(struct mlx5_manage_pages_outbox)) / 8;
+	ret = (sizeof(lay->out) + MLX5_BLKS_FOR_RECLAIM_PAGES * sizeof(block->data) -
+	       sizeof(struct mlx5_manage_pages_outbox)) /
+	       FIELD_SIZEOF(struct mlx5_manage_pages_outbox, pas[0]);
 
 	return ret;
 }