On 5/1/20 11:43 PM, James Smart wrote:
By default, the driver attempts to allocate a hdwq per logical cpu in
order to provide good cpu affinity. Some systems have extremely high cpu
counts and this can significantly raise memory consumption.
In testing on x86 platforms (non-AMD) it is found that sharing of a hdwq
by a physical cpu and it's HT cpu can occur with little performance
degredation. By sharing the hdwq count can be halved, significantly
reducing the memory overhead.
Change the default behavior of the driver on non-AMD x86 platforms to
share a hdwq by the cpu and its HT cpu.
Signed-off-by: Dick Kennedy <dick.kennedy@xxxxxxxxxxxx>
Signed-off-by: James Smart <jsmart2021@xxxxxxxxx>
---
drivers/scsi/lpfc/lpfc.h | 23 ++++++--
drivers/scsi/lpfc/lpfc_attr.c | 106 +++++++++++++++++++++++++++-------
drivers/scsi/lpfc/lpfc_init.c | 82 +++++++++++---------------
drivers/scsi/lpfc/lpfc_sli4.h | 2 +-
4 files changed, 137 insertions(+), 76 deletions(-)
I do assume that you've checked that this matches with blk-mq queue
layout, right?
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Cheers,
Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare@xxxxxxx +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
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