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Thu, 19 Nov 2020 01:12:55 +0000 (GMT) From: Thomas Falcon To: kuba@kernel.org Subject: [PATCH net-next v2 9/9] ibmvnic: Do not replenish RX buffers after every polling loop Date: Wed, 18 Nov 2020 19:12:25 -0600 Message-Id: <1605748345-32062-10-git-send-email-tlfalcon@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1605748345-32062-1-git-send-email-tlfalcon@linux.ibm.com> References: <1605748345-32062-1-git-send-email-tlfalcon@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312, 18.0.737 definitions=2020-11-18_10:2020-11-17, 2020-11-18 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=1 clxscore=1015 mlxscore=0 bulkscore=0 lowpriorityscore=0 mlxlogscore=560 impostorscore=0 phishscore=0 spamscore=0 malwarescore=0 adultscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011190003 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: cforno12@linux.ibm.com, netdev@vger.kernel.org, ljp@linux.vnet.ibm.com, ricklind@linux.ibm.com, dnbanerg@us.ibm.com, tlfalcon@linux.ibm.com, drt@linux.vnet.ibm.com, brking@linux.vnet.ibm.com, sukadev@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: "Dwip N. Banerjee" 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. Signed-off-by: Dwip N. Banerjee --- drivers/net/ethernet/ibm/ibmvnic.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) 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 @@ static int ibmvnic_poll(struct napi_struct *napi, int budget) 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)) { -- 2.26.2