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Tue, 6 Jul 2021 17:23:46 +0000 Received: from awfm-01.cornelisnetworks.com (localhost [127.0.0.1]) by awfm-01.cornelisnetworks.com (8.14.7/8.14.7) with ESMTP id 166HNjQl058971; Tue, 6 Jul 2021 13:23:45 -0400 Subject: [PATCH for-rc or next 1/2] IB/hfi1: Indicate DMA wait when txq is queued for wakeup From: Dennis Dalessandro To: jgg@ziepe.ca, dledford@redhat.com Cc: linux-rdma@vger.kernel.org, Mike Marciniszyn Date: Tue, 06 Jul 2021 13:23:45 -0400 Message-ID: <20210706172345.49902.10221.stgit@awfm-01.cornelisnetworks.com> In-Reply-To: <20210706171942.49902.72880.stgit@awfm-01.cornelisnetworks.com> References: <20210706171942.49902.72880.stgit@awfm-01.cornelisnetworks.com> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: aa50bc8b-8094-499c-c78d-08d940a2cfa9 X-MS-TrafficTypeDiagnostic: MW4PR01MB6275: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3968; 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X-OriginatorOrg: cornelisnetworks.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jul 2021 17:23:46.1816 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: aa50bc8b-8094-499c-c78d-08d940a2cfa9 X-MS-Exchange-CrossTenant-Id: 4dbdb7da-74ee-4b45-8747-ef5ce5ebe68a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=4dbdb7da-74ee-4b45-8747-ef5ce5ebe68a;Ip=[208.255.156.42];Helo=[awfm-01.cornelisnetworks.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT010.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR01MB6275 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Mike Marciniszyn There is no counter for dmawait in AIP, which hampers debugging performance issues. Add the counter increment when the txq is queued. Fixes: d99dc602e2a5 ("IB/hfi1: Add functions to transmit datagram ipoib packets") Fixes: c4cf5688ea69 ("IB/hfi1: Indicate DMA wait when txq is queued for wakeup") Signed-off-by: Mike Marciniszyn Signed-off-by: Dennis Dalessandro --- drivers/infiniband/hw/hfi1/ipoib_tx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/infiniband/hw/hfi1/ipoib_tx.c b/drivers/infiniband/hw/hfi1/ipoib_tx.c index 993f983..e74ddbe 100644 --- a/drivers/infiniband/hw/hfi1/ipoib_tx.c +++ b/drivers/infiniband/hw/hfi1/ipoib_tx.c @@ -644,10 +644,13 @@ static int hfi1_ipoib_sdma_sleep(struct sdma_engine *sde, /* came from non-list submit */ list_add_tail(&txreq->list, &txq->tx_list); if (list_empty(&txq->wait.list)) { + struct hfi1_ibport *ibp = &sde->ppd->ibport_data; + if (!atomic_xchg(&txq->no_desc, 1)) { trace_hfi1_txq_queued(txq); hfi1_ipoib_stop_txq(txq); } + ibp->rvp.n_dmawait++; iowait_queue(pkts_sent, wait->iow, &sde->dmawait); }