Author: hselasky Date: Mon Apr 6 09:41:22 2020 New Revision: 359653 URL: https://svnweb.freebsd.org/changeset/base/359653
Log: Count number of times transmit ring is out of buffers in mlx5en(4). Differential Revision: https://reviews.freebsd.org/D24273 MFC after: 1 week Sponsored by: Mellanox Technologies Modified: head/sys/dev/mlx5/mlx5_en/en.h head/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c Modified: head/sys/dev/mlx5/mlx5_en/en.h ============================================================================== --- head/sys/dev/mlx5/mlx5_en/en.h Mon Apr 6 07:16:31 2020 (r359652) +++ head/sys/dev/mlx5/mlx5_en/en.h Mon Apr 6 09:41:22 2020 (r359653) @@ -627,6 +627,7 @@ struct mlx5e_rq_stats { m(+1, u64, csum_offload_none, "csum_offload_none", "Transmitted packets") \ m(+1, u64, defragged, "defragged", "Transmitted packets") \ m(+1, u64, dropped, "dropped", "Transmitted packets") \ + m(+1, u64, enobuf, "enobuf", "Transmitted packets") \ m(+1, u64, nop, "nop", "Transmitted packets") #define MLX5E_SQ_STATS_NUM (0 MLX5E_SQ_STATS(MLX5E_STATS_COUNT)) Modified: head/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c ============================================================================== --- head/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c Mon Apr 6 07:16:31 2020 (r359652) +++ head/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c Mon Apr 6 09:41:22 2020 (r359653) @@ -401,6 +401,7 @@ mlx5e_sq_dump_xmit(struct mlx5e_sq *sq, struct mlx5e_x /* return ENOBUFS if the queue is full */ if (unlikely(!mlx5e_sq_has_room_for(sq, xsegs))) { + sq->stats.enobuf++; bus_dmamap_unload(sq->dma_tag, sq->mbuf[pi].dma_map); m_freem(mb); *mbp = NULL; /* safety clear */ @@ -493,8 +494,10 @@ mlx5e_sq_xmit(struct mlx5e_sq *sq, struct mbuf **mbp) top: #endif /* Return ENOBUFS if the queue is full */ - if (unlikely(!mlx5e_sq_has_room_for(sq, 2 * MLX5_SEND_WQE_MAX_WQEBBS))) + if (unlikely(!mlx5e_sq_has_room_for(sq, 2 * MLX5_SEND_WQE_MAX_WQEBBS))) { + sq->stats.enobuf++; return (ENOBUFS); + } /* Align SQ edge with NOPs to avoid WQE wrap around */ pi = ((~sq->pc) & sq->wq.sz_m1); @@ -502,8 +505,10 @@ top: /* Send one multi NOP message instead of many */ mlx5e_send_nop(sq, (pi + 1) * MLX5_SEND_WQEBB_NUM_DS); pi = ((~sq->pc) & sq->wq.sz_m1); - if (pi < (MLX5_SEND_WQE_MAX_WQEBBS - 1)) + if (pi < (MLX5_SEND_WQE_MAX_WQEBBS - 1)) { + sq->stats.enobuf++; return (ENOMEM); + } } #ifdef KERN_TLS _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
