From patchwork Thu Mar 30 15:30:54 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Salil Mehta X-Patchwork-Id: 96315 Delivered-To: patch@linaro.org Received: by 10.140.89.233 with SMTP id v96csp296027qgd; Thu, 30 Mar 2017 08:36:47 -0700 (PDT) X-Received: by 10.98.201.212 with SMTP id l81mr313944pfk.13.1490888207909; Thu, 30 Mar 2017 08:36:47 -0700 (PDT) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id u91si2473821plb.142.2017.03.30.08.36.47; Thu, 30 Mar 2017 08:36:47 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of netdev-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of netdev-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=netdev-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934622AbdC3Pgr (ORCPT + 6 others); Thu, 30 Mar 2017 11:36:47 -0400 Received: from szxga02-in.huawei.com ([45.249.212.188]:4857 "EHLO dggrg02-dlp.huawei.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S934700AbdC3Pct (ORCPT ); Thu, 30 Mar 2017 11:32:49 -0400 Received: from 172.30.72.56 (EHLO DGGEML402-HUB.china.huawei.com) ([172.30.72.56]) by dggrg02-dlp.huawei.com (MOS 4.4.6-GA FastPath queued) with ESMTP id AKU85008; Thu, 30 Mar 2017 23:32:40 +0800 (CST) Received: from S00293818-DELL1.china.huawei.com (10.203.181.152) by DGGEML402-HUB.china.huawei.com (10.3.17.38) with Microsoft SMTP Server id 14.3.301.0; Thu, 30 Mar 2017 23:32:33 +0800 From: Salil Mehta To: CC: , , , , , , lipeng Subject: [PATCH net 07/19] net: hns: Optimize hns_nic_common_poll for better performance Date: Thu, 30 Mar 2017 16:30:54 +0100 Message-ID: <20170330153106.14344-8-salil.mehta@huawei.com> X-Mailer: git-send-email 2.8.3 In-Reply-To: <20170330153106.14344-1-salil.mehta@huawei.com> References: <20170330153106.14344-1-salil.mehta@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.203.181.152] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090203.58DD2519.0010, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 3cab36bb461bf774a5b08914cf2e1cfe Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: lipeng After polling less than buget packages, we need check again. If there are still some packages, we call napi_schedule add softirq queue, this is not better way. So we return buget value instead of napi_schedule. Signed-off-by: lipeng reviewed-by: Yisen Zhuang Signed-off-by: Salil Mehta --- drivers/net/ethernet/hisilicon/hns/hns_enet.c | 50 ++++++++++++++++----------- drivers/net/ethernet/hisilicon/hns/hns_enet.h | 2 +- 2 files changed, 31 insertions(+), 21 deletions(-) -- 2.7.4 diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c index 646f601..a083660 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c @@ -861,7 +861,7 @@ static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data, return recv_pkts; } -static void hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data) +static bool hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data) { struct hnae_ring *ring = ring_data->ring; int num = 0; @@ -875,22 +875,23 @@ static void hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data) ring_data->ring->q->handle->dev->ops->toggle_ring_irq( ring_data->ring, 1); - napi_schedule(&ring_data->napi); + return false; + } else { + return true; } } -static void hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data) +static bool hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data) { struct hnae_ring *ring = ring_data->ring; - int num = 0; + int num; num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM); - if (num == 0) - ring_data->ring->q->handle->dev->ops->toggle_ring_irq( - ring, 0); + if (!num) + return true; else - napi_schedule(&ring_data->napi); + return false; } static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring, @@ -991,7 +992,7 @@ static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data, return 0; } -static void hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data) +static bool hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data) { struct hnae_ring *ring = ring_data->ring; int head; @@ -1004,20 +1005,21 @@ static void hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data) ring_data->ring->q->handle->dev->ops->toggle_ring_irq( ring_data->ring, 1); - napi_schedule(&ring_data->napi); + return false; + } else { + return true; } } -static void hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data) +static bool hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data) { struct hnae_ring *ring = ring_data->ring; int head = readl_relaxed(ring->io_base + RCB_REG_HEAD); if (head == ring->next_to_clean) - ring_data->ring->q->handle->dev->ops->toggle_ring_irq( - ring, 0); + return true; else - napi_schedule(&ring_data->napi); + return false; } static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data) @@ -1044,15 +1046,23 @@ static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data) static int hns_nic_common_poll(struct napi_struct *napi, int budget) { + int clean_complete = 0; struct hns_nic_ring_data *ring_data = container_of(napi, struct hns_nic_ring_data, napi); - int clean_complete = ring_data->poll_one( - ring_data, budget, ring_data->ex_process); + struct hnae_ring *ring = ring_data->ring; - if (clean_complete >= 0 && clean_complete < budget) { - napi_complete(napi); - ring_data->fini_process(ring_data); - return 0; +try_again: + clean_complete += ring_data->poll_one( + ring_data, budget - clean_complete, + ring_data->ex_process); + + if (clean_complete < budget) { + if (ring_data->fini_process(ring_data)) { + napi_complete(napi); + ring->q->handle->dev->ops->toggle_ring_irq(ring, 0); + } else { + goto try_again; + } } return clean_complete; diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.h b/drivers/net/ethernet/hisilicon/hns/hns_enet.h index fff8f8a..1b83232 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.h +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.h @@ -41,7 +41,7 @@ struct hns_nic_ring_data { int queue_index; int (*poll_one)(struct hns_nic_ring_data *, int, void *); void (*ex_process)(struct hns_nic_ring_data *, struct sk_buff *); - void (*fini_process)(struct hns_nic_ring_data *); + bool (*fini_process)(struct hns_nic_ring_data *); }; /* compatible the difference between two versions */