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| author |  Vasyl Gomonovych <gomonovych@gmail.com>
| 2018-04-20 10:20:36 -0700 |
|---|---|---|
| committer |  Santosh Shilimkar <santosh.shilimkar@oracle.com>
| 2018-04-20 10:20:36 -0700 |
| commit | bc3acbb8752ee9d4b3bed091886511171bf6050f (patch) | |
| tree | 0e52845c0de60e5b44f0b757caea7420d4d8d677 /drivers/soc/ti/knav_qmss.h | |
| parent | memory: aemif: add support for board files (diff) | |
| download | linux-bc3acbb8752ee9d4b3bed091886511171bf6050f.tar.gz linux-bc3acbb8752ee9d4b3bed091886511171bf6050f.tar.bz2 linux-bc3acbb8752ee9d4b3bed091886511171bf6050f.zip | |
soc: ti: knav_qmss: Use percpu instead atomic for stats counter
Hwqueue has collect statistics in heavy use queue_pop/queu_push functions
for cache efficiency and make push/pop faster use percpu variables.
For performance reasons, driver should keep descriptor in software handler
as short as possible and quickly return it back to hardware queue.
Descriptors coming into driver from hardware after pop and return back
by push to reduce descriptor lifetime in driver collect statistics on percpu.
Signed-off-by: Vasyl Gomonovych <gomonovych@gmail.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Diffstat (limited to 'drivers/soc/ti/knav_qmss.h')
| -rw-r--r-- | drivers/soc/ti/knav_qmss.h | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/soc/ti/knav_qmss.h b/drivers/soc/ti/knav_qmss.h index 905b974d1bdc..22f409b86107 100644 --- a/drivers/soc/ti/knav_qmss.h +++ b/drivers/soc/ti/knav_qmss.h @@ -19,6 +19,8 @@ #ifndef __KNAV_QMSS_H__ #define __KNAV_QMSS_H__ +#include <linux/percpu.h> + #define THRESH_GTE BIT(7) #define THRESH_LT 0 @@ -162,11 +164,11 @@ struct knav_qmgr_info { * notifies: notifier counts */ struct knav_queue_stats { - atomic_t pushes; - atomic_t pops; - atomic_t push_errors; - atomic_t pop_errors; - atomic_t notifies; + unsigned int pushes; + unsigned int pops; + unsigned int push_errors; + unsigned int pop_errors; + unsigned int notifies; }; /** @@ -283,7 +285,7 @@ struct knav_queue_inst { struct knav_queue { struct knav_reg_queue __iomem *reg_push, *reg_pop, *reg_peek; struct knav_queue_inst *inst; - struct knav_queue_stats stats; + struct knav_queue_stats __percpu *stats; knav_queue_notify_fn notifier_fn; void *notifier_fn_arg; atomic_t notifier_enabled; |