diff options
| author | Dean Luick <dean.luick@intel.com> | 2016-03-05 16:50:43 (GMT) |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2016-03-17 19:55:17 (GMT) |
| commit | 528ee9fbf0244406a76cb5e37406eef303b09a46 (patch) | |
| tree | ac506b8b323bba1b2ef96b10d5582b88a75ec834 /drivers/staging/rdma/hfi1/init.c | |
| parent | 8fefef125ed4b9347068d782aa5439f3da3dca32 (diff) | |
| download | linux-528ee9fbf0244406a76cb5e37406eef303b09a46.tar.xz | |
IB/hfi1: Add adaptive cacheless verbs copy
The kernel memcpy is faster than a cacheless copy. However,
if too much of the L3 cache is overwritten by one-time copies
then overall bandwidth suffers. Implement an adaptive scheme
where full page copies are tracked and if the number of unique
entries are larger than a threshold, verbs will use a cacheless
copy. Tracked entries are gradually cleaned, allowing memcpy to
resume once the larger copies have stopped.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/staging/rdma/hfi1/init.c')
| -rw-r--r-- | drivers/staging/rdma/hfi1/init.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/staging/rdma/hfi1/init.c b/drivers/staging/rdma/hfi1/init.c index f21933c..deabb08 100644 --- a/drivers/staging/rdma/hfi1/init.c +++ b/drivers/staging/rdma/hfi1/init.c @@ -1242,6 +1242,9 @@ static int __init hfi1_mod_init(void) idr_init(&hfi1_unit_table); hfi1_dbg_init(); + ret = hfi1_wss_init(); + if (ret < 0) + goto bail_wss; ret = pci_register_driver(&hfi1_pci_driver); if (ret < 0) { pr_err("Unable to register driver: error %d\n", -ret); @@ -1250,6 +1253,8 @@ static int __init hfi1_mod_init(void) goto bail; /* all OK */ bail_dev: + hfi1_wss_exit(); +bail_wss: hfi1_dbg_exit(); idr_destroy(&hfi1_unit_table); dev_cleanup(); @@ -1265,6 +1270,7 @@ module_init(hfi1_mod_init); static void __exit hfi1_mod_cleanup(void) { pci_unregister_driver(&hfi1_pci_driver); + hfi1_wss_exit(); hfi1_dbg_exit(); hfi1_cpulist_count = 0; kfree(hfi1_cpulist); |