xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

IB/qib: Optimize CQ callbacks

Browse Source 
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 <ramkrishna.vepa@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Mike Marciniszyn
2013-06-04 15:05:37 -04:00
committed by Roland Dreier
parent c804f07248
commit 85caafe307
4 changed files with 76 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/infiniband/hw/qib/qib_init.c
View File

@@ -97,8 +97,6 @@ unsigned qib_wc_pat = 1; /* default (1) is to use PAT, not MTRR */
module_param_named(wc_pat, qib_wc_pat, uint, S_IRUGO);
MODULE_PARM_DESC(wc_pat, "enable write-combining via PAT mechanism");
struct workqueue_struct *qib_cq_wq;
static void verify_interrupt(unsigned long);
static struct idr qib_unit_table;
@@ -445,6 +443,7 @@ static int loadtime_init(struct qib_devdata *dd)
dd->intrchk_timer.function = verify_interrupt;
dd->intrchk_timer.data = (unsigned long) dd;
ret = qib_cq_init(dd);
done:
return ret;
}
@@ -1215,12 +1214,6 @@ static int __init qlogic_ib_init(void)
if (ret)
goto bail;
qib_cq_wq = create_singlethread_workqueue("qib_cq");
if (!qib_cq_wq) {
ret = -ENOMEM;
goto bail_dev;
}
/*
* These must be called before the driver is registered with
* the PCI subsystem.
@@ -1233,7 +1226,7 @@ static int __init qlogic_ib_init(void)
ret = pci_register_driver(&qib_driver);
if (ret < 0) {
pr_err("Unable to register driver: error %d\n", -ret);
goto bail_unit;
goto bail_dev;
}
/* not fatal if it doesn't work */
@@ -1241,13 +1234,11 @@ static int __init qlogic_ib_init(void)
pr_err("Unable to register ipathfs\n");
goto bail; /* all OK */
bail_unit:
bail_dev:
#ifdef CONFIG_INFINIBAND_QIB_DCA
dca_unregister_notify(&dca_notifier);
#endif
idr_destroy(&qib_unit_table);
destroy_workqueue(qib_cq_wq);
bail_dev:
qib_dev_cleanup();
bail:
return ret;
@@ -1273,8 +1264,6 @@ static void __exit qlogic_ib_cleanup(void)
#endif
pci_unregister_driver(&qib_driver);
destroy_workqueue(qib_cq_wq);
qib_cpulist_count = 0;
kfree(qib_cpulist);
@@ -1365,6 +1354,7 @@ static void cleanup_device_data(struct qib_devdata *dd)
}
kfree(tmp);
kfree(dd->boardname);
qib_cq_exit(dd);
}
/*