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| author | Michael J. Ruhl <michael.j.ruhl@intel.com> | 2017-08-21 18:26:45 -0700 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-08-28 19:12:18 -0400 |
| commit | 7956371ea48bd00956219a82fd3af655dd216073 (patch) | |
| tree | 7279bc238b80cb372f3d6adf3b1d2cc09247d5b4 | |
| parent | de42de80d7bb4f82e30d16f5c64da90e64b6c644 (diff) | |
| download | linux-7956371ea48bd00956219a82fd3af655dd216073.tar.gz | |
IB/hfi1: Improve local kmem_cache_alloc performance
Performance analysis shows that the cache callback function sdma_kmem_cache_ctor contributes to 1/2 of the kmem_cache_allocs time. Since all of the fields in the allocated data structure are initialized in the code path, remove the _ctor function. Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
| -rw-r--r-- | drivers/infiniband/hw/hfi1/user_sdma.c | 9 | ||||
| -rw-r--r-- | drivers/infiniband/hw/hfi1/verbs_txreq.c | 11 | ||||
| -rw-r--r-- | drivers/infiniband/hw/hfi1/vnic_sdma.c | 13 |
3 files changed, 6 insertions, 27 deletions
diff --git a/drivers/infiniband/hw/hfi1/user_sdma.c b/drivers/infiniband/hw/hfi1/user_sdma.c index aae1f40016e4..9b89df584943 100644 --- a/drivers/infiniband/hw/hfi1/user_sdma.c +++ b/drivers/infiniband/hw/hfi1/user_sdma.c @@ -331,13 +331,6 @@ static void activate_packet_queue(struct iowait *wait, int reason) wake_up(&wait->wait_dma); }; -static void sdma_kmem_cache_ctor(void *obj) -{ - struct user_sdma_txreq *tx = obj; - - memset(tx, 0, sizeof(*tx)); -} - int hfi1_user_sdma_alloc_queues(struct hfi1_ctxtdata *uctxt, struct hfi1_filedata *fd) { @@ -391,7 +384,7 @@ int hfi1_user_sdma_alloc_queues(struct hfi1_ctxtdata *uctxt, sizeof(struct user_sdma_txreq), L1_CACHE_BYTES, SLAB_HWCACHE_ALIGN, - sdma_kmem_cache_ctor); + NULL); if (!pq->txreq_cache) { dd_dev_err(dd, "[%u] Failed to allocate TxReq cache\n", uctxt->ctxt); diff --git a/drivers/infiniband/hw/hfi1/verbs_txreq.c b/drivers/infiniband/hw/hfi1/verbs_txreq.c index 5d23172c470f..873e48ea923f 100644 --- a/drivers/infiniband/hw/hfi1/verbs_txreq.c +++ b/drivers/infiniband/hw/hfi1/verbs_txreq.c @@ -1,5 +1,5 @@ /* - * Copyright(c) 2016 Intel Corporation. + * Copyright(c) 2016 - 2017 Intel Corporation. * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. @@ -119,13 +119,6 @@ out: return tx; } -static void verbs_txreq_kmem_cache_ctor(void *obj) -{ - struct verbs_txreq *tx = (struct verbs_txreq *)obj; - - memset(tx, 0, sizeof(*tx)); -} - int verbs_txreq_init(struct hfi1_ibdev *dev) { char buf[TXREQ_LEN]; @@ -135,7 +128,7 @@ int verbs_txreq_init(struct hfi1_ibdev *dev) dev->verbs_txreq_cache = kmem_cache_create(buf, sizeof(struct verbs_txreq), 0, SLAB_HWCACHE_ALIGN, - verbs_txreq_kmem_cache_ctor); + NULL); if (!dev->verbs_txreq_cache) return -ENOMEM; return 0; diff --git a/drivers/infiniband/hw/hfi1/vnic_sdma.c b/drivers/infiniband/hw/hfi1/vnic_sdma.c index 7815d7405462..c3c96c5869ed 100644 --- a/drivers/infiniband/hw/hfi1/vnic_sdma.c +++ b/drivers/infiniband/hw/hfi1/vnic_sdma.c @@ -303,22 +303,15 @@ void hfi1_vnic_sdma_init(struct hfi1_vnic_vport_info *vinfo) } } -static void hfi1_vnic_txreq_kmem_cache_ctor(void *obj) -{ - struct vnic_txreq *tx = (struct vnic_txreq *)obj; - - memset(tx, 0, sizeof(*tx)); -} - int hfi1_vnic_txreq_init(struct hfi1_devdata *dd) { char buf[HFI1_VNIC_TXREQ_NAME_LEN]; snprintf(buf, sizeof(buf), "hfi1_%u_vnic_txreq_cache", dd->unit); dd->vnic.txreq_cache = kmem_cache_create(buf, - sizeof(struct vnic_txreq), - 0, SLAB_HWCACHE_ALIGN, - hfi1_vnic_txreq_kmem_cache_ctor); + sizeof(struct vnic_txreq), + 0, SLAB_HWCACHE_ALIGN, + NULL); if (!dd->vnic.txreq_cache) return -ENOMEM; return 0; |