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s390/qdio: add statistics helper macro 

qperf_inc() takes a queue as input, but actually updates the statistics
in its qdio_irq parent.
In some contexts we already have access to the qdio_irq struct, and can
avoid the additional dereference.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Julian Wiedmann 2019-09-30 15:42:35 +02:00 committed by Vasily Gorbik
parent d86f71fd43
commit 4611281021
3 changed files with 7 additions and 5 deletions
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6
drivers/s390/cio/qdio.h
View File

@ -317,13 +317,15 @@ struct qdio_irq {
#define qperf(__qdev, __attr) ((__qdev)->perf_stat.(__attr))
#define qperf_inc(__q, __attr) \
#define QDIO_PERF_STAT_INC(__irq, __attr) \
({ \
struct qdio_irq *qdev = (__q)->irq_ptr; \
struct qdio_irq *qdev = __irq; \
if (qdev->perf_stat_enabled) \
(qdev->perf_stat.__attr)++; \
})
#define qperf_inc(__q, __attr) QDIO_PERF_STAT_INC((__q)->irq_ptr, __attr)
static inline void account_sbals_error(struct qdio_q *q, int count)
{
q->q_stats.nr_sbal_error += count;

2
drivers/s390/cio/qdio_main.c
View File

@ -963,7 +963,7 @@ static void qdio_int_handler_pci(struct qdio_irq *irq_ptr)
/* skip if polling is enabled or already in work */
if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED,
&q->u.in.queue_irq_state)) {
qperf_inc(q, int_discarded);
QDIO_PERF_STAT_INC(irq_ptr, int_discarded);
continue;
}
q->u.in.queue_start_poll(q->irq_ptr->cdev, q->nr,

4
drivers/s390/cio/qdio_thinint.c
View File

@ -146,7 +146,7 @@ static inline void tiqdio_call_inq_handlers(struct qdio_irq *irq)
/* skip if polling is enabled or already in work */
if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED,
&q->u.in.queue_irq_state)) {
qperf_inc(q, int_discarded);
QDIO_PERF_STAT_INC(irq, int_discarded);
continue;
}
@ -196,7 +196,7 @@ static void tiqdio_thinint_handler(struct airq_struct *airq, bool floating)
tiqdio_call_inq_handlers(irq);
qperf_inc(q, adapter_int);
QDIO_PERF_STAT_INC(irq, adapter_int);
}
rcu_read_unlock();
}