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| author | Quinn Tran <quinn.tran@cavium.com> | 2017-06-14 06:47:20 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-06-28 04:21:40 +0300 |
| commit | 09620eeb62c4167d0c206f9a69730fa9e9251aae (patch) | |
| tree | 7c03e5194e923553bebefd958d645e7c2eb8963f /drivers/scsi/qla2xxx/qla_target.c | |
| parent | d65237c7f086042b5630d94fe2d151f62c09f723 (diff) | |
| download | linux-09620eeb62c4167d0c206f9a69730fa9e9251aae.tar.xz | |
scsi: qla2xxx: Add debug knob for user control workload
For Target mode, user can control the work load by placing qla2xxx's irq
vector on certain CPU via the smp_affinity knob. This patch allows user
to control the number of QPair's irq to be active. The irqs are
allocated at driver load time until unload. The work itself is placed on
the QPair based on user setting.
Usage:
modprobe qla2xxx qlini_mode=disabled ql2xuctrlirq=1
mount -t debugfs none /sys/kernel/debug
echo 2 > /sys/kernel/debug/qla2xxx/qla2xxx_[host num]/naqp
echo [cpu id] > /proc/irq/[irq id]/smp_affinity_list
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_target.c')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_target.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 92e41055e6f8..87f80dccaf8c 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -66,6 +66,13 @@ MODULE_PARM_DESC(ql_dm_tgt_ex_pct, "the percentage of exchanges/cmds FW will allocate resources " "for Target mode."); +int ql2xuctrlirq = 1; +module_param(ql2xuctrlirq, int, 0644); +MODULE_PARM_DESC(ql2xuctrlirq, + "User to control IRQ placement via smp_affinity." + "Valid with qlini_mode=disabled." + "1(default): enable"); + int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; static int temp_sam_status = SAM_STAT_BUSY; @@ -4059,6 +4066,31 @@ static void qlt_do_work(struct work_struct *work) __qlt_do_work(cmd); } +void qlt_clr_qp_table(struct scsi_qla_host *vha) +{ + unsigned long flags; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; + void *node; + u64 key = 0; + + ql_log(ql_log_info, vha, 0x706c, + "User update Number of Active Qpairs %d\n", + ha->tgt.num_act_qpairs); + + spin_lock_irqsave(&ha->tgt.atio_lock, flags); + + btree_for_each_safe64(&tgt->lun_qpair_map, key, node) + btree_remove64(&tgt->lun_qpair_map, key); + + ha->base_qpair->lun_cnt = 0; + for (key = 0; key < ha->max_qpairs; key++) + if (ha->queue_pair_map[key]) + ha->queue_pair_map[key]->lun_cnt = 0; + + spin_unlock_irqrestore(&ha->tgt.atio_lock, flags); +} + static void qlt_assign_qpair(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) { |