RDMA/mlx5: Introduce ODP prefetch counter
Subsystems (2)
PATCH 1/1 RDMA/mlx5: Introduce ODP prefetch counter
From: Maor Gottlieb <[email protected]>
For debugging purpose it will be easier to understand if prefetch works okay if it has its own counter. Introduce ODP prefetch counter and count per MR the total number of prefetched pages.
In addition remove comment which is not relevant anymore and anyway not in the correct place.
Signed-off-by Maor Gottlieb <[email protected]>
Signed-off-by Leon Romanovsky <[email protected]>
--- drivers/infiniband/hw/mlx5/odp.c | 19 ++++++++++--------- drivers/infiniband/hw/mlx5/restrack.c | 3 +++ include/rdma/ib_verbs.h | 1 + 3 files changed, 14 insertions(+), 9 deletions(-)
drivers/infiniband/hw/mlx5/odp.c +10 -9
@@ -913,11 +913,6 @@ static int pagefault_single_data_segment(struct mlx5_ib_dev *dev,if (ret <0 ) goto srcu_unlock; -/* -* When prefetching a page, page fault is generated -* in order to bring the page to the main memory. -* In the current flow, page faults are being counted. -*/ mlx5_update_odp_stats (mr, faults, ret); npages += ret;
@@ -1755,12 +1750,17 @@ static void mlx5_ib_prefetch_mr_work(struct work_struct *w)struct prefetch_mr_work *work = container_of(w, struct prefetch_mr_work, work);u32 bytes_mapped =0 ; +int ret;u32 i; -for (i =0 ; i < work->num_sge; ++i) -pagefault_mr (work->frags[i].mr, work->frags[i].io_virt, - work->frags[i].length, &bytes_mapped, - work->pf_flags); +for (i =0 ; i < work->num_sge; ++i) { + ret =pagefault_mr (work->frags[i].mr, work->frags[i].io_virt, + work->frags[i].length, &bytes_mapped, + work->pf_flags); +if (ret <=0 ) +continue ; +mlx5_update_odp_stats (work->frags[i].mr, prefetch, ret); + }destroy_prefetch_work (work); }
@@ -1818,6 +1818,7 @@ static int mlx5_ib_prefetch_sg_list(struct ib_pd *pd, &bytes_mapped, pf_flags);if (ret <0 ) goto out; +mlx5_update_odp_stats (mr, prefetch, ret); } ret =0 ;
drivers/infiniband/hw/mlx5/restrack.c +3 -0
@@ -99,6 +99,9 @@ int mlx5_ib_fill_stat_mr_entry(struct sk_buff *msg, msg, "page_invalidations", atomic64_read(&mr->odp_stats.invalidations))) goto err_table; +if (rdma_nl_stat_hwcounter_entry (msg,"page_prefetch" , +atomic64_read (&mr->odp_stats.prefetch))) + goto err_table;nla_nest_end (msg, table_attr);return 0 ;
include/rdma/ib_verbs.h +1 -0
@@ -2271,6 +2271,7 @@ struct rdma_netdev_alloc_params {struct ib_odp_counters {atomic64_t faults;atomic64_t invalidations; +atomic64_t prefetch; };struct ib_counters {
Signature · 1 line
2.26.2
Quoted 9 lines · Leon Romanovsky
From: Maor Gottlieb <[email protected]>
For debugging purpose it will be easier to understand if prefetch works okay if it has its own counter. Introduce ODP prefetch counter and count per MR the total number of prefetched pages.
In addition remove comment which is not relevant anymore and anyway not in the correct place.
Quoted 7 lines
Signed-off-by Maor Gottlieb <[email protected]>Signed-off-by Leon Romanovsky <[email protected]>--- drivers/infiniband/hw/mlx5/odp.c | 19 ++++++++++--------- drivers/infiniband/hw/mlx5/restrack.c | 3 +++ include/rdma/ib_verbs.h | 1 + 3 files changed, 14 insertions(+), 9 deletions(-)
Applied to for-next, thanks
Jason