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[v2,06/13] staging/rdma/hfi1: Move s_sde to the read mostly portion of the hfi1_qp structure

Message ID 1447729175-28745-7-git-send-email-jubin.john@intel.com (mailing list archive)
State Not Applicable
Headers show

Commit Message

jubin.john@intel.com Nov. 17, 2015, 2:59 a.m. UTC 
From: Harish Chegondi <harish.chegondi@intel.com>

This would reduce L2 cache misses on s_sde in the _hfi1_schedule_send
function when invoked from post_send thereby improving performance of
post_send.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
---
 drivers/staging/rdma/hfi1/verbs.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
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Patch

diff --git a/drivers/staging/rdma/hfi1/verbs.h b/drivers/staging/rdma/hfi1/verbs.h
index 600bd1b..638094d 100644
--- a/drivers/staging/rdma/hfi1/verbs.h
+++ b/drivers/staging/rdma/hfi1/verbs.h
@@ -441,6 +441,7 @@  struct hfi1_qp {
 	struct hfi1_swqe *s_wq;  /* send work queue */
 	struct hfi1_mmap_info *ip;
 	struct ahg_ib_header *s_hdr;     /* next packet header to send */
+	struct sdma_engine *s_sde; /* current sde */
 	u8 s_sc;			/* SC[0..4] for next packet */
 	unsigned long timeout_jiffies;  /* computed from timeout */
 
@@ -504,7 +505,6 @@  struct hfi1_qp {
 	struct hfi1_swqe *s_wqe;
 	struct hfi1_sge_state s_sge;     /* current send request data */
 	struct hfi1_mregion *s_rdma_mr;
-	struct sdma_engine *s_sde; /* current sde */
 	u32 s_cur_size;         /* size of send packet in bytes */
 	u32 s_len;              /* total length of s_sge */
 	u32 s_rdma_read_len;    /* total length of s_rdma_read_sge */