diff options
| author | Shailend Chand <shailend@google.com> | 2022-10-29 19:53:22 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-11-02 14:52:51 +0300 |
| commit | 82fd151d38d9fda714c5bb2e9e79ecd6bdc72da6 (patch) | |
| tree | 2182458d2230c574ea1896c6931190e0fcd84818 /drivers/net/ethernet/google/gve/gve.h | |
| parent | d08b0f8f46e45a274fc8c9a5bc92cb9da70d9887 (diff) | |
| download | linux-82fd151d38d9fda714c5bb2e9e79ecd6bdc72da6.tar.xz | |
gve: Reduce alloc and copy costs in the GQ rx path
Previously, even if just one of the many fragments of a 9k packet
required a copy, we'd copy the whole packet into a freshly-allocated
9k-sized linear SKB, and this led to performance issues.
By having a pool of pages to copy into, each fragment can be
independently handled, leading to a reduced incidence of
allocation and copy.
Signed-off-by: Shailend Chand <shailend@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/google/gve/gve.h')
| -rw-r--r-- | drivers/net/ethernet/google/gve/gve.h | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index 160735484465..5655da9cd236 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -60,7 +60,8 @@ struct gve_rx_slot_page_info { void *page_address; u32 page_offset; /* offset to write to in page */ int pagecnt_bias; /* expected pagecnt if only the driver has a ref */ - u8 can_flip; + u16 pad; /* adjustment for rx padding */ + u8 can_flip; /* tracks if the networking stack is using the page */ }; /* A list of pages registered with the device during setup and used by a queue @@ -149,10 +150,17 @@ struct gve_rx_ctx { /* head and tail of skb chain for the current packet or NULL if none */ struct sk_buff *skb_head; struct sk_buff *skb_tail; - u16 total_expected_size; - u8 expected_frag_cnt; - u8 curr_frag_cnt; - u8 reuse_frags; + u32 total_size; + u8 frag_cnt; + bool drop_pkt; +}; + +struct gve_rx_cnts { + u32 ok_pkt_bytes; + u16 ok_pkt_cnt; + u16 total_pkt_cnt; + u16 cont_pkt_cnt; + u16 desc_err_pkt_cnt; }; /* Contains datapath state used to represent an RX queue. */ @@ -167,6 +175,10 @@ struct gve_rx_ring { /* threshold for posting new buffs and descs */ u32 db_threshold; u16 packet_buffer_size; + + u32 qpl_copy_pool_mask; + u32 qpl_copy_pool_head; + struct gve_rx_slot_page_info *qpl_copy_pool; }; /* DQO fields. */ @@ -216,7 +228,9 @@ struct gve_rx_ring { u64 rx_desc_err_dropped_pkt; /* free-running count of packets dropped by descriptor error */ u64 rx_cont_packet_cnt; /* free-running multi-fragment packets received */ u64 rx_frag_flip_cnt; /* free-running count of rx segments where page_flip was used */ - u64 rx_frag_copy_cnt; /* free-running count of rx segments copied into skb linear portion */ + u64 rx_frag_copy_cnt; /* free-running count of rx segments copied */ + u64 rx_frag_alloc_cnt; /* free-running count of rx page allocations */ + u32 q_num; /* queue index */ u32 ntfy_id; /* notification block index */ struct gve_queue_resources *q_resources; /* head and tail pointer idx */ |