diff options
| author | Dwip N. Banerjee <dnbanerg@us.ibm.com> | 2020-11-18 19:12:25 -0600 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-11-20 19:50:41 -0800 |
| commit | 41ed0a00ffcd903ece4304a4a65d95706115ffcb (patch) | |
| tree | 977893544fd7907aceaba48c4e8f7daec4536c97 /drivers | |
| parent | e552aa313bbaf118b5f7b7f7fba7e28593f8d90d (diff) | |
ibmvnic: Do not replenish RX buffers after every polling loop
Reduce the amount of time spent replenishing RX buffers by only doing
so once available buffers has fallen under a certain threshold, in this
case half of the total number of buffers, or if the polling loop exits
before the packets processed is less than its budget. Non-exhaustion of
NAPI budget implies lower incoming packet pressure, allowing the leeway
to refill the buffers in preparation for any impending burst.
Signed-off-by: Dwip N. Banerjee <dnbanerg@us.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/ibm/ibmvnic.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index 96df6d8fa277..9fe43ab0496d 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -2537,7 +2537,10 @@ restart_poll: frames_processed++; } - if (adapter->state != VNIC_CLOSING) + if (adapter->state != VNIC_CLOSING && + ((atomic_read(&adapter->rx_pool[scrq_num].available) < + adapter->req_rx_add_entries_per_subcrq / 2) || + frames_processed < budget)) replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); if (frames_processed < budget) { if (napi_complete_done(napi, frames_processed)) { |