From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 6B742A2EDB for ; Fri, 6 Sep 2019 18:12:50 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id D50091F437; Fri, 6 Sep 2019 18:12:46 +0200 (CEST) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by dpdk.org (Postfix) with ESMTP id B4E191F428 for ; Fri, 6 Sep 2019 18:12:44 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Sep 2019 09:12:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,473,1559545200"; d="scan'208";a="358825691" Received: from sivswdev09.ir.intel.com (HELO localhost.localdomain) ([10.237.217.48]) by orsmga005.jf.intel.com with ESMTP; 06 Sep 2019 09:12:42 -0700 From: Fiona Trahe To: dev@dpdk.org Cc: akhil.goyal@nxp.com, arkadiuszx.kusztal@intel.com, fiona.trahe@intel.com Date: Fri, 6 Sep 2019 17:12:27 +0100 Message-Id: <1567786349-25353-2-git-send-email-fiona.trahe@intel.com> X-Mailer: git-send-email 1.7.0.7 In-Reply-To: <1567784675-1401-1-git-send-email-fiona.trahe@intel.com> References: <1567784675-1401-1-git-send-email-fiona.trahe@intel.com> Subject: [dpdk-dev] [PATCH v2 1/3] common/qat: remove tail write coalescing feature X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" The feature Coalescing Tail Writes on Enqueue is removed as it is not thread-safe and a dual-thread feature will be added shortly. Signed-off-by: Fiona Trahe --- drivers/common/qat/qat_qp.c | 16 +++------------- drivers/common/qat/qat_qp.h | 6 ------ 2 files changed, 3 insertions(+), 19 deletions(-) diff --git a/drivers/common/qat/qat_qp.c b/drivers/common/qat/qat_qp.c index 03f11f869..01ddce008 100644 --- a/drivers/common/qat/qat_qp.c +++ b/drivers/common/qat/qat_qp.c @@ -538,7 +538,6 @@ static inline void txq_write_tail(struct qat_qp *qp, struct qat_queue *q) { WRITE_CSR_RING_TAIL(qp->mmap_bar_addr, q->hw_bundle_number, q->hw_queue_number, q->tail); - q->nb_pending_requests = 0; q->csr_tail = q->tail; } @@ -622,25 +621,20 @@ qat_enqueue_op_burst(void *qp, void **ops, uint16_t nb_ops) kick_tail: queue->tail = tail; tmp_qp->stats.enqueued_count += nb_ops_sent; - queue->nb_pending_requests += nb_ops_sent; - if (tmp_qp->inflights16 < QAT_CSR_TAIL_FORCE_WRITE_THRESH || - queue->nb_pending_requests > QAT_CSR_TAIL_WRITE_THRESH) { - txq_write_tail(tmp_qp, queue); - } + txq_write_tail(tmp_qp, queue); return nb_ops_sent; } uint16_t qat_dequeue_op_burst(void *qp, void **ops, uint16_t nb_ops) { - struct qat_queue *rx_queue, *tx_queue; + struct qat_queue *rx_queue; struct qat_qp *tmp_qp = (struct qat_qp *)qp; uint32_t head; uint32_t resp_counter = 0; uint8_t *resp_msg; rx_queue = &(tmp_qp->rx_q); - tx_queue = &(tmp_qp->tx_q); head = rx_queue->head; resp_msg = (uint8_t *)rx_queue->base_addr + rx_queue->head; @@ -677,11 +671,7 @@ qat_dequeue_op_burst(void *qp, void **ops, uint16_t nb_ops) QAT_CSR_HEAD_WRITE_THRESH) rxq_free_desc(tmp_qp, rx_queue); } - /* also check if tail needs to be advanced */ - if (tmp_qp->inflights16 <= QAT_CSR_TAIL_FORCE_WRITE_THRESH && - tx_queue->tail != tx_queue->csr_tail) { - txq_write_tail(tmp_qp, tx_queue); - } + return resp_counter; } diff --git a/drivers/common/qat/qat_qp.h b/drivers/common/qat/qat_qp.h index 980c2ba32..9212ca457 100644 --- a/drivers/common/qat/qat_qp.h +++ b/drivers/common/qat/qat_qp.h @@ -11,10 +11,6 @@ struct qat_pci_device; #define QAT_CSR_HEAD_WRITE_THRESH 32U /* number of requests to accumulate before writing head CSR */ -#define QAT_CSR_TAIL_WRITE_THRESH 32U -/* number of requests to accumulate before writing tail CSR */ -#define QAT_CSR_TAIL_FORCE_WRITE_THRESH 256U -/* number of inflights below which no tail write coalescing should occur */ typedef int (*build_request_t)(void *op, uint8_t *req, void *op_cookie, @@ -64,8 +60,6 @@ struct qat_queue { uint32_t csr_tail; /* last written tail value */ uint16_t nb_processed_responses; /* number of responses processed since last CSR head write */ - uint16_t nb_pending_requests; - /* number of requests pending since last CSR tail write */ }; struct qat_qp { -- 2.13.6