From: Saeed Mahameed <saeed@kernel.org>
To: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org, Tariq Toukan <tariqt@nvidia.com>,
Parav Pandit <parav@nvidia.com>,
Saeed Mahameed <saeedm@nvidia.com>
Subject: [net-next 11/16] net/mlx5: E-Switch, cut down mlx5_vport_info structure size by 8 bytes
Date: Sat, 3 Apr 2021 21:19:49 -0700 [thread overview]
Message-ID: <20210404041954.146958-12-saeed@kernel.org> (raw)
In-Reply-To: <20210404041954.146958-1-saeed@kernel.org>
From: Parav Pandit <parav@nvidia.com>
Structure mlx5_vport_info consumes 40 bytes of space due to a hole
in it. After packing it reduces to 32 bytes.
Currently:
pahole -C mlx5_vport_info drivers/net/ethernet/mellanox/mlx5/core/eswitch.o
struct mlx5_vport_info {
u8 mac[6]; /* 0 6 */
u16 vlan; /* 6 2 */
u8 qos; /* 8 1 */
/* XXX 7 bytes hole, try to pack */
u64 node_guid; /* 16 8 */
int link_state; /* 24 4 */
u32 min_rate; /* 28 4 */
u32 max_rate; /* 32 4 */
bool spoofchk; /* 36 1 */
bool trusted; /* 37 1 */
/* size: 40, cachelines: 1, members: 9 */
/* sum members: 31, holes: 1, sum holes: 7 */
/* padding: 2 */
/* last cacheline: 40 bytes */
};
After packing:
$ pahole -C mlx5_vport_info drivers/net/ethernet/mellanox/mlx5/core/eswitch.o
struct mlx5_vport_info {
u8 mac[6]; /* 0 6 */
u16 vlan; /* 6 2 */
u64 node_guid; /* 8 8 */
int link_state; /* 16 4 */
u32 min_rate; /* 20 4 */
u32 max_rate; /* 24 4 */
u8 qos; /* 28 1 */
u8 spoofchk:1; /* 29: 0 1 */
u8 trusted:1; /* 29: 1 1 */
/* size: 32, cachelines: 1, members: 9 */
/* padding: 2 */
/* bit_padding: 6 bits */
/* last cacheline: 32 bytes */
};
Signed-off-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
drivers/net/ethernet/mellanox/mlx5/core/eswitch.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index 64db903068c1..5d50b127f81a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -120,6 +120,8 @@ struct mlx5_vport_info {
u16 vlan;
u64 node_guid;
int link_state;
+ u32 min_rate;
+ u32 max_rate;
u8 qos;
u8 spoofchk: 1;
u8 trusted: 1;
--
2.30.2
next prev parent reply other threads:[~2021-04-04 4:20 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-04 4:19 [pull request][net-next 00/16] mlx5 updates 2021-04-02 Saeed Mahameed
2021-04-04 4:19 ` [net-next 01/16] net/mlx5: CT: Add support for matching on ct_state inv and rel flags Saeed Mahameed
2021-04-04 8:50 ` patchwork-bot+netdevbpf
2021-04-04 4:19 ` [net-next 02/16] net/mlx5: E-Switch, cut down mlx5_vport_info structure size by 8 bytes Saeed Mahameed
2021-04-04 4:19 ` [net-next 03/16] net/mlx5: E-Switch, move QoS specific fields to existing qos struct Saeed Mahameed
2021-04-04 4:19 ` [net-next 04/16] net/mlx5: Use unsigned int for free_count Saeed Mahameed
2021-04-04 4:19 ` [net-next 05/16] net/mlx5: Pack mlx5_rl_entry structure Saeed Mahameed
2021-04-04 4:19 ` [net-next 06/16] net/mlx5: Do not hold mutex while reading table constants Saeed Mahameed
2021-04-04 4:19 ` [net-next 07/16] net/mlx5: Use helpers to allocate and free rl table entries Saeed Mahameed
2021-04-04 4:19 ` [net-next 08/16] net/mlx5: Use helper to increment, decrement rate entry refcount Saeed Mahameed
2021-04-04 4:19 ` [net-next 09/16] net/mlx5: Allocate rate limit table when rate is configured Saeed Mahameed
2021-04-04 4:19 ` [net-next 10/16] net/mlx5: Pair mutex_destory with mutex_init for rate limit table Saeed Mahameed
2021-04-04 4:19 ` Saeed Mahameed [this message]
2021-04-04 4:19 ` [net-next 12/16] net/mlx5: E-Switch, move QoS specific fields to existing qos struct Saeed Mahameed
2021-04-04 4:19 ` [net-next 13/16] net/mlx5: Use ida_alloc_range() instead of ida_simple_alloc() Saeed Mahameed
2021-04-04 4:19 ` [net-next 14/16] net/mlx5e: Reject tc rules which redirect from a VF to itself Saeed Mahameed
2021-04-04 4:19 ` [net-next 15/16] net/mlx5e: Dynamic alloc arfs table for netdev when needed Saeed Mahameed
2021-04-04 4:19 ` [net-next 16/16] net/mlx5e: Dynamic alloc vlan " Saeed Mahameed
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