From 85caafe307a06e4f9993c8f3c994a07374c07831 Mon Sep 17 00:00:00 2001 From: Mike Marciniszyn Date: Tue, 4 Jun 2013 15:05:37 -0400 Subject: IB/qib: Optimize CQ callbacks The current workqueue implemention has the following performance deficiencies on QDR HCAs: - The CQ call backs tend to run on the CPUs processing the receive queues - The single thread queue isn't optimal for multiple HCAs This patch adds a dedicated per HCA bound thread to process CQ callbacks. Reviewed-by: Ramkrishna Vepa Signed-off-by: Mike Marciniszyn Signed-off-by: Roland Dreier --- drivers/infiniband/hw/qib/qib.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers/infiniband/hw/qib/qib.h') diff --git a/drivers/infiniband/hw/qib/qib.h b/drivers/infiniband/hw/qib/qib.h index 2ee82e6550c7..3a78b92cbd4e 100644 --- a/drivers/infiniband/hw/qib/qib.h +++ b/drivers/infiniband/hw/qib/qib.h @@ -1,7 +1,7 @@ #ifndef _QIB_KERNEL_H #define _QIB_KERNEL_H /* - * Copyright (c) 2012 Intel Corporation. All rights reserved. + * Copyright (c) 2012, 2013 Intel Corporation. All rights reserved. * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved. * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. * @@ -51,6 +51,7 @@ #include #include #include +#include #include "qib_common.h" #include "qib_verbs.h" @@ -1090,6 +1091,8 @@ struct qib_devdata { u16 psxmitwait_check_rate; /* high volume overflow errors defered to tasklet */ struct tasklet_struct error_tasklet; + /* per device cq worker */ + struct kthread_worker *worker; int assigned_node_id; /* NUMA node closest to HCA */ }; -- cgit v1.2.3