We have increased performance by setting inbound to 16 and outbound to 4. We will send patch for it.
-----Original Message----- From: Jack Wang [mailto:xjtu...@gmail.com] Sent: Thursday, September 26, 2013 12:38 PM To: Anand Kumar Santhanam Cc: linux-scsi@vger.kernel.org; Sangeetha Gnanasekaran; Nikith Ganigarakoppal; Viswas G Subject: Re: [PATCH V2 08/10] pm80xx: Queue rotation logic for inbound and outbound queues On 09/26/2013 07:40 AM, Anand wrote: > From 678d8085ace7c471dc140420c41dc4ad70300d60 Mon Sep 17 00:00:00 2001 > From: Anand Kumar Santhanam <anandkumar.santha...@pmcs.com> > Date: Wed, 18 Sep 2013 11:12:59 +0530 > Subject: [PATCH V2 08/10] pm80xx: Queue rotation logic for inbound and outbound queues. > > Signed-off-by: anandkumar.santha...@pmcs.com > I'd like to know the number of this improved for performance? Jack > --- > drivers/scsi/pm8001/pm80xx_hwi.c | 31 +++++++++++++------------------ > 1 files changed, 13 insertions(+), 18 deletions(-) > > diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c > b/drivers/scsi/pm8001/pm80xx_hwi.c > index 80a10aa..ce59d0d 100644 > --- a/drivers/scsi/pm8001/pm80xx_hwi.c > +++ b/drivers/scsi/pm8001/pm80xx_hwi.c > @@ -3715,8 +3715,7 @@ static int pm80xx_chip_ssp_io_req(struct pm8001_hba_info *pm8001_ha, > int ret; > u64 phys_addr; > struct inbound_queue_table *circularQ; > - static u32 inb; > - static u32 outb; > + u32 q_index; > u32 opc = OPC_INB_SSPINIIOSTART; > memset(&ssp_cmd, 0, sizeof(ssp_cmd)); > memcpy(ssp_cmd.ssp_iu.lun, task->ssp_task.LUN, 8); @@ -3735,7 > +3734,8 @@ static int pm80xx_chip_ssp_io_req(struct pm8001_hba_info *pm8001_ha, > ssp_cmd.ssp_iu.efb_prio_attr |= (task->ssp_task.task_attr & 7); > memcpy(ssp_cmd.ssp_iu.cdb, task->ssp_task.cmd->cmnd, > task->ssp_task.cmd->cmd_len); > - circularQ = &pm8001_ha->inbnd_q_tbl[0]; > + q_index = (u32) (pm8001_dev->id & 0x00ffffff) % PM8001_MAX_INB_NUM; > + circularQ = &pm8001_ha->inbnd_q_tbl[q_index]; > > /* Check if encryption is set */ > if (pm8001_ha->chip->encrypt && > @@ -3783,7 +3783,7 @@ static int pm80xx_chip_ssp_io_req(struct pm8001_hba_info *pm8001_ha, > } else { > PM8001_IO_DBG(pm8001_ha, pm8001_printk( > "Sending Normal SAS command 0x%x inb q %x\n", > - task->ssp_task.cmd->cmnd[0], inb)); > + task->ssp_task.cmd->cmnd[0], q_index)); > /* fill in PRD (scatter/gather) table, if any */ > if (task->num_scatter > 1) { > pm8001_chip_make_sg(task->scatter, ccb->n_elem, @@ -3809,11 > +3809,9 @@ static int pm80xx_chip_ssp_io_req(struct pm8001_hba_info *pm8001_ha, > ssp_cmd.esgl = 0; > } > } > - ret = pm8001_mpi_build_cmd(pm8001_ha, circularQ, opc, &ssp_cmd, outb++); > - > - /* rotate the outb queue */ > - outb = outb%PM8001_MAX_SPCV_OUTB_NUM; > - > + q_index = (u32) (pm8001_dev->id & 0x00ffffff) % PM8001_MAX_OUTB_NUM; > + ret = pm8001_mpi_build_cmd(pm8001_ha, circularQ, opc, > + &ssp_cmd, q_index); > return ret; > } > > @@ -3825,8 +3823,7 @@ static int pm80xx_chip_sata_req(struct pm8001_hba_info *pm8001_ha, > struct pm8001_device *pm8001_ha_dev = dev->lldd_dev; > u32 tag = ccb->ccb_tag; > int ret; > - static u32 inb; > - static u32 outb; > + u32 q_index; > struct sata_start_req sata_cmd; > u32 hdr_tag, ncg_tag = 0; > u64 phys_addr; > @@ -3836,7 +3833,8 @@ static int pm80xx_chip_sata_req(struct pm8001_hba_info *pm8001_ha, > unsigned long flags; > u32 opc = OPC_INB_SATA_HOST_OPSTART; > memset(&sata_cmd, 0, sizeof(sata_cmd)); > - circularQ = &pm8001_ha->inbnd_q_tbl[0]; > + q_index = (u32) (pm8001_ha_dev->id & 0x00ffffff) % PM8001_MAX_INB_NUM; > + circularQ = &pm8001_ha->inbnd_q_tbl[q_index]; > > if (task->data_dir == PCI_DMA_NONE) { > ATAP = 0x04; /* no data*/ > @@ -3917,7 +3915,7 @@ static int pm80xx_chip_sata_req(struct pm8001_hba_info *pm8001_ha, > } else { > PM8001_IO_DBG(pm8001_ha, pm8001_printk( > "Sending Normal SATA command 0x%x inb %x\n", > - sata_cmd.sata_fis.command, inb)); > + sata_cmd.sata_fis.command, q_index)); > /* dad (bit 0-1) is 0 */ > sata_cmd.ncqtag_atap_dir_m_dad = > cpu_to_le32(((ncg_tag & 0xff)<<16) | @@ -4014,12 +4012,9 @@ static > int pm80xx_chip_sata_req(struct pm8001_hba_info *pm8001_ha, > } > } > } > - > + q_index = (u32) (pm8001_ha_dev->id & 0x00ffffff) % > +PM8001_MAX_OUTB_NUM; > ret = pm8001_mpi_build_cmd(pm8001_ha, circularQ, opc, > - &sata_cmd, outb++); > - > - /* rotate the outb queue */ > - outb = outb%PM8001_MAX_SPCV_OUTB_NUM; > + &sata_cmd, q_index); > return ret; > } > > -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
