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Message-Id: <20221027145643.6618-13-saeed@kernel.org>
Date: Thu, 27 Oct 2022 15:56:41 +0100
From: Saeed Mahameed <saeed@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Eric Dumazet <edumazet@...gle.com>
Cc: Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
Tariq Toukan <tariqt@...dia.com>,
Yevgeny Kliteynik <kliteyn@...dia.com>,
Alex Vesker <valex@...dia.com>
Subject: [net-next V2 12/14] net/mlx5: DR, Lower sync threshold for ICM hot memory
From: Yevgeny Kliteynik <kliteyn@...dia.com>
Instead of hiding the math in the code, define a value that sets the
fraction of allowed hot memory of ICM pool.
Set the threshold for sync of ICM hot chunks to 1/4 of the pool
instead of 1/2 of the pool. Although we will have more syncs, each
sync will be shorter and will help with insertion rate stability.
Signed-off-by: Yevgeny Kliteynik <kliteyn@...dia.com>
Reviewed-by: Alex Vesker <valex@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
.../net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c
index ca91a0211a5c..286b7ce6bc0b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c
@@ -4,6 +4,7 @@
#include "dr_types.h"
#define DR_ICM_MODIFY_HDR_ALIGN_BASE 64
+#define DR_ICM_POOL_HOT_MEMORY_FRACTION 4
struct mlx5dr_icm_pool {
enum mlx5dr_icm_type icm_type;
@@ -337,10 +338,11 @@ static bool dr_icm_pool_is_sync_required(struct mlx5dr_icm_pool *pool)
{
int allow_hot_size;
- /* sync when hot memory reaches half of the pool size */
+ /* sync when hot memory reaches a certain fraction of the pool size */
allow_hot_size =
mlx5dr_icm_pool_chunk_size_to_byte(pool->max_log_chunk_sz,
- pool->icm_type) / 2;
+ pool->icm_type) /
+ DR_ICM_POOL_HOT_MEMORY_FRACTION;
return pool->hot_memory_size > allow_hot_size;
}
--
2.37.3
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