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IB/rdmavt: Correct issues with read-mostly and send size cache lines 

The s_ahgpsn was incorrectly placed in the read-mostly section of the QP
and the s_curr_size and s_hdrwords are oversized. The misplaced
s_ahgpsn will cause the read-mostly cachelines to thrash.

Place s_ahgpsn in the send side cache lines and correctly size and
s_hdrwords and s_cur_size to keep the send side cachelines at the same
size.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Sebastian Sanchez 2017-10-02 11:04:41 -07:00 committed by Doug Ledford
parent a917374e8a
commit 7ebfc93edc
2 changed files with 5 additions and 5 deletions
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4
drivers/infiniband/hw/hfi1/chip.c
View File

@ -8739,8 +8739,8 @@ static int set_physical_link_state(struct hfi1_devdata *dd, u64 state)
return do_8051_command(dd, HCMD_CHANGE_PHY_STATE, state, NULL);
}
int _load_8051_config(struct hfi1_devdata *dd, u8 field_id,
u8 lane_id, u32 config_data)
static int _load_8051_config(struct hfi1_devdata *dd, u8 field_id,
u8 lane_id, u32 config_data)
{
u64 data;
int ret;

6
include/rdma/rdmavt_qp.h
View File

@ -282,7 +282,6 @@ struct rvt_qp {
u32 remote_qpn;
u32 qkey; /* QKEY for this QP (for UD or RD) */
u32 s_size; /* send work queue size */
u32 s_ahgpsn; /* set to the psn in the copy of the header */
u16 pmtu; /* decoded from path_mtu */
u8 log_pmtu; /* shift for pmtu */
@ -344,7 +343,6 @@ struct rvt_qp {
struct rvt_swqe *s_wqe;
struct rvt_sge_state s_sge; /* current send request data */
struct rvt_mregion *s_rdma_mr;
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 */
u32 s_last_psn; /* last response PSN processed */
@ -358,8 +356,10 @@ struct rvt_qp {
u32 s_acked; /* last un-ACK'ed entry */
u32 s_last; /* last completed entry */
u32 s_lsn; /* limit sequence number (credit) */
u16 s_hdrwords; /* size of s_hdr in 32 bit words */
u32 s_ahgpsn; /* set to the psn in the copy of the header */
u16 s_cur_size; /* size of send packet in bytes */
u16 s_rdma_ack_cnt;
u8 s_hdrwords; /* size of s_hdr in 32 bit words */
s8 s_ahgidx;
u8 s_state; /* opcode of last packet sent */
u8 s_ack_state; /* opcode of packet to ACK */