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net/mlx5: Allow skipping counter refresh on creation

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CT creates a counter for each CT rule, and for each such counter,
fs_counters tries to queue mlx5_fc_stats_work() work again via
mod_delayed_work(0) call to refresh all counters. This call has a
large performance impact when reaching high insertion rate and
accounts for ~8% of the insertion time when using software steering.

Allow skipping the refresh of all counters during counter creation.
Change CT to use this refresh skipping for it's counters.

Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Paul Blakey 2021-07-11 16:56:54 +03:00 committed by Saeed Mahameed
parent 428ffea071
commit 504e157248
3 changed files with 16 additions and 4 deletions
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2
drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
View File

@ -889,7 +889,7 @@ mlx5_tc_ct_counter_create(struct mlx5_tc_ct_priv *ct_priv)
return ERR_PTR(-ENOMEM);
counter->is_shared = false;
counter->counter = mlx5_fc_create(ct_priv->dev, true);
counter->counter = mlx5_fc_create_ex(ct_priv->dev, true);
if (IS_ERR(counter->counter)) {
ct_dbg("Failed to create counter for ct entry");
ret = PTR_ERR(counter->counter);

14
drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c
View File

@ -301,7 +301,7 @@ static struct mlx5_fc *mlx5_fc_acquire(struct mlx5_core_dev *dev, bool aging)
return mlx5_fc_single_alloc(dev);
}
struct mlx5_fc *mlx5_fc_create(struct mlx5_core_dev *dev, bool aging)
struct mlx5_fc *mlx5_fc_create_ex(struct mlx5_core_dev *dev, bool aging)
{
struct mlx5_fc *counter = mlx5_fc_acquire(dev, aging);
struct mlx5_fc_stats *fc_stats = &dev->priv.fc_stats;
@ -332,8 +332,6 @@ struct mlx5_fc *mlx5_fc_create(struct mlx5_core_dev *dev, bool aging)
goto err_out_alloc;
llist_add(&counter->addlist, &fc_stats->addlist);
mod_delayed_work(fc_stats->wq, &fc_stats->work, 0);
}
return counter;
@ -342,6 +340,16 @@ err_out_alloc:
mlx5_fc_release(dev, counter);
return ERR_PTR(err);
}
struct mlx5_fc *mlx5_fc_create(struct mlx5_core_dev *dev, bool aging)
{
struct mlx5_fc *counter = mlx5_fc_create_ex(dev, aging);
struct mlx5_fc_stats *fc_stats = &dev->priv.fc_stats;
if (aging)
mod_delayed_work(fc_stats->wq, &fc_stats->work, 0);
return counter;
}
EXPORT_SYMBOL(mlx5_fc_create);
u32 mlx5_fc_id(struct mlx5_fc *counter)

4
include/linux/mlx5/fs.h
View File

@ -245,6 +245,10 @@ int mlx5_modify_rule_destination(struct mlx5_flow_handle *handler,
struct mlx5_flow_destination *old_dest);
struct mlx5_fc *mlx5_fc_create(struct mlx5_core_dev *dev, bool aging);
/* As mlx5_fc_create() but doesn't queue stats refresh thread. */
struct mlx5_fc *mlx5_fc_create_ex(struct mlx5_core_dev *dev, bool aging);
void mlx5_fc_destroy(struct mlx5_core_dev *dev, struct mlx5_fc *counter);
u64 mlx5_fc_query_lastuse(struct mlx5_fc *counter);
void mlx5_fc_query_cached(struct mlx5_fc *counter,