From patchwork Wed Nov 4 22:33:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Nelson X-Patchwork-Id: 1394537 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=pensando.io Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=pensando.io header.i=@pensando.io header.a=rsa-sha256 header.s=google header.b=neISJ2EC; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CRLzl4Nx9z9sTK for ; Thu, 5 Nov 2020 09:34:11 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732297AbgKDWeK (ORCPT ); Wed, 4 Nov 2020 17:34:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37042 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732162AbgKDWeH (ORCPT ); Wed, 4 Nov 2020 17:34:07 -0500 Received: from mail-pf1-x429.google.com (mail-pf1-x429.google.com [IPv6:2607:f8b0:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 65991C0613CF for ; Wed, 4 Nov 2020 14:34:07 -0800 (PST) Received: by mail-pf1-x429.google.com with SMTP id c20so18519503pfr.8 for ; Wed, 04 Nov 2020 14:34:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=pensando.io; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=T4Y3nDGLzMHA66yGPJNoaME43oRNIcZvy5J8hI+97Ds=; b=neISJ2ECmPxvt58psg1thJFFYJjoRLJojqw4u7m/OOkZndVJhwAVySxXoZ1DXnVqM9 0Cf+GQ75cRRmxBKbD0GEFPrA35oey/gW75voTaW9Dyy2utd1C69n6ak14UQQYKwGkVVx a5O8xvPdDwfEM2iE6idQeNyD2d3T+x+xLUg8jlI74KyW37yMDJ35ZElZYHE3OR+lFIMW 6IbWf3lZSOtYqBbxvoTITUP5yAi3l19aZAk+Krsi/E1rZDJABJOkBy2RdEi0FOIW5iLy Qvni+LOfEr1QD4OrcTxhIY4qK6vQe6ZRI9yU9fsdAcY+45b6DTNB2droPuRrbX0HJe6+ T+XA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=T4Y3nDGLzMHA66yGPJNoaME43oRNIcZvy5J8hI+97Ds=; b=Lb5CtoQruvnENUisuvuAaOxo3qJuUwUswAKh1X1Ah14VT4+MDxuUkOw1yRq/296BCT pgiJvltIzFtOl6SWMR4FQiyvjcibCZHuGKOw/OEHw+CsNUO0z8VkXn1psFrcWgBevT0E gLQBR9uBK+KBXuSWi8Au+t19kyY0ZudltnotMSNkrDQCrZH5WzPUG4Eq9pOMAqENV0cb o9Afej5xvNwQIJVjc7jvwNrce9bgD26x5pApIR1VAIbkqX9+ILf66suJ0sB2Bq9KiBgC M4ibM0teWxCVdUKGbMduZPOj3KBGEkE6+hioJQj8r8uqasEv1LV2c4PNZ7d/MmeAmeoI bkKQ== X-Gm-Message-State: AOAM5332BQt+xUzRt1LKZ7/xZYaP1xl68bZ4cMY/dqO7BwnInWcBM8Pf vzRts46L4wSZ5hIrffUN9SHXtSgpmTXwsA== X-Google-Smtp-Source: ABdhPJzokIcjzJ2zSGjoPbLj3aDG4ktxvYauqdx3D7KVYf6Ma3rrP22KirJj8hYr/SoF0rUCF3fWbw== X-Received: by 2002:aa7:9f90:0:b029:164:bcf:de16 with SMTP id z16-20020aa79f900000b02901640bcfde16mr17605pfr.3.1604529246715; Wed, 04 Nov 2020 14:34:06 -0800 (PST) Received: from driver-dev1.pensando.io ([12.226.153.42]) by smtp.gmail.com with ESMTPSA id z10sm3284559pff.218.2020.11.04.14.34.05 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 04 Nov 2020 14:34:06 -0800 (PST) From: Shannon Nelson To: netdev@vger.kernel.org, davem@davemloft.net, kuba@kernel.org Cc: Shannon Nelson Subject: [PATCH net-next 4/6] ionic: batch rx buffer refilling Date: Wed, 4 Nov 2020 14:33:52 -0800 Message-Id: <20201104223354.63856-5-snelson@pensando.io> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201104223354.63856-1-snelson@pensando.io> References: <20201104223354.63856-1-snelson@pensando.io> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org We don't need to refill the rx descriptors on every napi if only a few were handled. Waiting until we can batch up a few together will save us a few Rx cycles. Signed-off-by: Shannon Nelson --- .../net/ethernet/pensando/ionic/ionic_dev.h | 4 +++- .../net/ethernet/pensando/ionic/ionic_txrx.c | 18 ++++++++++-------- 2 files changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h index 6c243b17312c..9064222a087a 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h +++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h @@ -12,8 +12,10 @@ #define IONIC_MAX_TX_DESC 8192 #define IONIC_MAX_RX_DESC 16384 -#define IONIC_MIN_TXRX_DESC 16 +#define IONIC_MIN_TXRX_DESC 64 #define IONIC_DEF_TXRX_DESC 4096 +#define IONIC_RX_FILL_THRESHOLD 64 +#define IONIC_RX_FILL_DIV 8 #define IONIC_LIFS_MAX 1024 #define IONIC_WATCHDOG_SECS 5 #define IONIC_ITR_COAL_USEC_DEFAULT 64 diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c index b3d2250c77d0..9156c9825a16 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c @@ -392,11 +392,6 @@ void ionic_rx_fill(struct ionic_queue *q) q->dbval | q->head_idx); } -static void ionic_rx_fill_cb(void *arg) -{ - ionic_rx_fill(arg); -} - void ionic_rx_empty(struct ionic_queue *q) { struct ionic_desc_info *desc_info; @@ -480,6 +475,7 @@ int ionic_rx_napi(struct napi_struct *napi, int budget) struct ionic_cq *cq = napi_to_cq(napi); struct ionic_dev *idev; struct ionic_lif *lif; + u16 rx_fill_threshold; u32 work_done = 0; u32 flags = 0; @@ -489,7 +485,9 @@ int ionic_rx_napi(struct napi_struct *napi, int budget) work_done = ionic_cq_service(cq, budget, ionic_rx_service, NULL, NULL); - if (work_done) + rx_fill_threshold = min_t(u16, IONIC_RX_FILL_THRESHOLD, + cq->num_descs / IONIC_RX_FILL_DIV); + if (work_done && ionic_q_space_avail(cq->bound_q) >= rx_fill_threshold) ionic_rx_fill(cq->bound_q); if (work_done < budget && napi_complete_done(napi, work_done)) { @@ -518,6 +516,7 @@ int ionic_txrx_napi(struct napi_struct *napi, int budget) struct ionic_dev *idev; struct ionic_lif *lif; struct ionic_cq *txcq; + u16 rx_fill_threshold; u32 rx_work_done = 0; u32 tx_work_done = 0; u32 flags = 0; @@ -531,8 +530,11 @@ int ionic_txrx_napi(struct napi_struct *napi, int budget) rx_work_done = ionic_cq_service(rxcq, budget, ionic_rx_service, NULL, NULL); - if (rx_work_done) - ionic_rx_fill_cb(rxcq->bound_q); + + rx_fill_threshold = min_t(u16, IONIC_RX_FILL_THRESHOLD, + rxcq->num_descs / IONIC_RX_FILL_DIV); + if (rx_work_done && ionic_q_space_avail(rxcq->bound_q) >= rx_fill_threshold) + ionic_rx_fill(rxcq->bound_q); if (rx_work_done < budget && napi_complete_done(napi, rx_work_done)) { ionic_dim_update(qcq);