diff options
| author | Peter Dunning <pdunning@solarflare.com> | 2015-07-08 12:05:10 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-07-09 10:00:40 +0300 |
| commit | c936835c1ec6f871f32c9b87a7708700320075b3 (patch) | |
| tree | 999f02b4bd00500bee3d131f55b30f3b1118e86d /drivers/net/ethernet/sfc/efx.c | |
| parent | d065c3c17dae95832badf6329512dd057c905890 (diff) | |
| download | linux-c936835c1ec6f871f32c9b87a7708700320075b3.tar.xz | |
sfc: Report TX completions to BQL after all TX events in interrupt
The limit for BQL is updated each time we call
netdev_tx_completed_queue.
Without this patch the BQL limit was updated for every TX event we
see.
The issue was that this only updated the limit to handle the data
we complete in two events as the first event wouldn't show that
enough traffic had been processed between them.
This was OK when interrupt moderation was off but not when it was
on as more data had to be completed in a single interrupt.
The patch changes this so that we do report the completion to BQL
only when all the TX events in the interrupt have been processed.
Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/sfc/efx.c')
| -rw-r--r-- | drivers/net/ethernet/sfc/efx.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c index 804b9ad553d3..03bc03b67f08 100644 --- a/drivers/net/ethernet/sfc/efx.c +++ b/drivers/net/ethernet/sfc/efx.c @@ -245,11 +245,17 @@ static int efx_check_disabled(struct efx_nic *efx) */ static int efx_process_channel(struct efx_channel *channel, int budget) { + struct efx_tx_queue *tx_queue; int spent; if (unlikely(!channel->enabled)) return 0; + efx_for_each_channel_tx_queue(tx_queue, channel) { + tx_queue->pkts_compl = 0; + tx_queue->bytes_compl = 0; + } + spent = efx_nic_process_eventq(channel, budget); if (spent && efx_channel_has_rx_queue(channel)) { struct efx_rx_queue *rx_queue = @@ -259,6 +265,14 @@ static int efx_process_channel(struct efx_channel *channel, int budget) efx_fast_push_rx_descriptors(rx_queue, true); } + /* Update BQL */ + efx_for_each_channel_tx_queue(tx_queue, channel) { + if (tx_queue->bytes_compl) { + netdev_tx_completed_queue(tx_queue->core_txq, + tx_queue->pkts_compl, tx_queue->bytes_compl); + } + } + return spent; } |