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[S390] qdio: make qdio statistics SMP-capable 

Use atomic_t/atomic64_t to make qdio performance statistics smp safe.
Remove temporarily calculation of "total time of inbound actions".

Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Ursula Braun 2007-05-04 18:47:49 +02:00 committed by Martin Schwidefsky
parent d4ee453bcf
commit 00c0c6466c
2 changed files with 172 additions and 116 deletions
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240
drivers/s390/cio/qdio.c
View File

@ -69,7 +69,6 @@ static const char version[] = "QDIO base support version 2";
static int qdio_performance_stats = 0;
static int proc_perf_file_registration;
static unsigned long i_p_c, i_p_nc, o_p_c, o_p_nc, ii_p_c, ii_p_nc;
static struct qdio_perf_stats perf_stats;
static int hydra_thinints;
@ -111,6 +110,31 @@ qdio_min(int a,int b)
}
/***************** SCRUBBER HELPER ROUTINES **********************/
#ifdef CONFIG_64BIT
static inline void qdio_perf_stat_inc(atomic64_t *count)
{
if (qdio_performance_stats)
atomic64_inc(count);
}
static inline void qdio_perf_stat_dec(atomic64_t *count)
{
if (qdio_performance_stats)
atomic64_dec(count);
}
#else /* CONFIG_64BIT */
static inline void qdio_perf_stat_inc(atomic_t *count)
{
if (qdio_performance_stats)
atomic_inc(count);
}
static inline void qdio_perf_stat_dec(atomic_t *count)
{
if (qdio_performance_stats)
atomic_dec(count);
}
#endif /* CONFIG_64BIT */
static inline __u64
qdio_get_micros(void)
@ -277,8 +301,7 @@ qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
QDIO_DBF_TEXT4(0,trace,"sigasync");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
if (qdio_performance_stats)
perf_stats.siga_syncs++;
qdio_perf_stat_inc(&perf_stats.siga_syncs);
cc = do_siga_sync(q->schid, gpr2, gpr3);
if (cc)
@ -323,8 +346,7 @@ qdio_siga_output(struct qdio_q *q)
__u32 busy_bit;
__u64 start_time=0;
if (qdio_performance_stats)
perf_stats.siga_outs++;
qdio_perf_stat_inc(&perf_stats.siga_outs);
QDIO_DBF_TEXT4(0,trace,"sigaout");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
@ -358,8 +380,7 @@ qdio_siga_input(struct qdio_q *q)
QDIO_DBF_TEXT4(0,trace,"sigain");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
if (qdio_performance_stats)
perf_stats.siga_ins++;
qdio_perf_stat_inc(&perf_stats.siga_ins);
cc = do_siga_input(q->schid, q->mask);
@ -953,8 +974,7 @@ __qdio_outbound_processing(struct qdio_q *q)
if (unlikely(qdio_reserve_q(q))) {
qdio_release_q(q);
if (qdio_performance_stats)
o_p_c++;
qdio_perf_stat_inc(&perf_stats.outbound_tl_runs_resched);
/* as we're sissies, we'll check next time */
if (likely(!atomic_read(&q->is_in_shutdown))) {
qdio_mark_q(q);
@ -962,10 +982,8 @@ __qdio_outbound_processing(struct qdio_q *q)
}
return;
}
if (qdio_performance_stats) {
o_p_nc++;
perf_stats.tl_runs++;
}
qdio_perf_stat_inc(&perf_stats.outbound_tl_runs);
qdio_perf_stat_inc(&perf_stats.tl_runs);
/* see comment in qdio_kick_outbound_q */
siga_attempts=atomic_read(&q->busy_siga_counter);
@ -1139,17 +1157,6 @@ qdio_has_inbound_q_moved(struct qdio_q *q)
{
int i;
static int old_pcis=0;
static int old_thinints=0;
if (qdio_performance_stats) {
if ((old_pcis==perf_stats.pcis)&&
(old_thinints==perf_stats.thinints))
perf_stats.start_time_inbound=NOW;
else
old_pcis=perf_stats.pcis;
}
i=qdio_get_inbound_buffer_frontier(q);
if ( (i!=GET_SAVED_FRONTIER(q)) ||
(q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
@ -1337,10 +1344,7 @@ qdio_kick_inbound_handler(struct qdio_q *q)
q->siga_error=0;
q->error_status_flags=0;
if (qdio_performance_stats) {
perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
perf_stats.inbound_cnt++;
}
qdio_perf_stat_inc(&perf_stats.inbound_cnt);
}
static void
@ -1360,8 +1364,7 @@ __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
*/
if (unlikely(qdio_reserve_q(q))) {
qdio_release_q(q);
if (qdio_performance_stats)
ii_p_c++;
qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
/*
* as we might just be about to stop polling, we make
* sure that we check again at least once more
@ -1369,8 +1372,7 @@ __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
tiqdio_sched_tl();
return;
}
if (qdio_performance_stats)
ii_p_nc++;
qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs);
if (unlikely(atomic_read(&q->is_in_shutdown))) {
qdio_unmark_q(q);
goto out;
@ -1412,8 +1414,7 @@ __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
for (i=0;i<irq_ptr->no_output_qs;i++) {
oq = irq_ptr->output_qs[i];
if (!qdio_is_outbound_q_done(oq)) {
if (qdio_performance_stats)
perf_stats.tl_runs--;
qdio_perf_stat_dec(&perf_stats.tl_runs);
__qdio_outbound_processing(oq);
}
}
@ -1452,8 +1453,7 @@ __qdio_inbound_processing(struct qdio_q *q)
if (unlikely(qdio_reserve_q(q))) {
qdio_release_q(q);
if (qdio_performance_stats)
i_p_c++;
qdio_perf_stat_inc(&perf_stats.inbound_tl_runs_resched);
/* as we're sissies, we'll check next time */
if (likely(!atomic_read(&q->is_in_shutdown))) {
qdio_mark_q(q);
@ -1461,10 +1461,8 @@ __qdio_inbound_processing(struct qdio_q *q)
}
return;
}
if (qdio_performance_stats) {
i_p_nc++;
perf_stats.tl_runs++;
}
qdio_perf_stat_inc(&perf_stats.inbound_tl_runs);
qdio_perf_stat_inc(&perf_stats.tl_runs);
again:
if (qdio_has_inbound_q_moved(q)) {
@ -1510,8 +1508,7 @@ tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
if (unlikely(qdio_reserve_q(q))) {
qdio_release_q(q);
if (qdio_performance_stats)
ii_p_c++;
qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
/*
* as we might just be about to stop polling, we make
* sure that we check again at least once more
@ -1602,8 +1599,7 @@ tiqdio_tl(unsigned long data)
{
QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
if (qdio_performance_stats)
perf_stats.tl_runs++;
qdio_perf_stat_inc(&perf_stats.tl_runs);
tiqdio_inbound_checks();
}
@ -1914,10 +1910,7 @@ tiqdio_thinint_handler(void)
{
QDIO_DBF_TEXT4(0,trace,"thin_int");
if (qdio_performance_stats) {
perf_stats.thinints++;
perf_stats.start_time_inbound=NOW;
}
qdio_perf_stat_inc(&perf_stats.thinints);
/* SVS only when needed:
* issue SVS to benefit from iqdio interrupt avoidance
@ -1972,17 +1965,12 @@ qdio_handle_pci(struct qdio_irq *irq_ptr)
int i;
struct qdio_q *q;
if (qdio_performance_stats) {
perf_stats.pcis++;
perf_stats.start_time_inbound=NOW;
}
qdio_perf_stat_inc(&perf_stats.pcis);
for (i=0;i<irq_ptr->no_input_qs;i++) {
q=irq_ptr->input_qs[i];
if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
qdio_mark_q(q);
else {
if (qdio_performance_stats)
perf_stats.tl_runs--;
__qdio_inbound_processing(q);
}
}
@ -1992,8 +1980,7 @@ qdio_handle_pci(struct qdio_irq *irq_ptr)
q=irq_ptr->output_qs[i];
if (qdio_is_outbound_q_done(q))
continue;
if (qdio_performance_stats)
perf_stats.tl_runs--;
qdio_perf_stat_dec(&perf_stats.tl_runs);
if (!irq_ptr->sync_done_on_outb_pcis)
SYNC_MEMORY;
__qdio_outbound_processing(q);
@ -3463,18 +3450,12 @@ do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
/* This is the outbound handling of queues */
if (qdio_performance_stats)
perf_stats.start_time_outbound=NOW;
qdio_do_qdio_fill_output(q,qidx,count,buffers);
used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
if (callflags&QDIO_FLAG_DONT_SIGA) {
if (qdio_performance_stats) {
perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
perf_stats.outbound_cnt++;
}
qdio_perf_stat_inc(&perf_stats.outbound_cnt);
return;
}
if (q->is_iqdio_q) {
@ -3504,8 +3485,7 @@ do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
qdio_kick_outbound_q(q);
} else {
QDIO_DBF_TEXT3(0,trace, "fast-req");
if (qdio_performance_stats)
perf_stats.fast_reqs++;
qdio_perf_stat_inc(&perf_stats.fast_reqs);
}
}
/*
@ -3516,10 +3496,7 @@ do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
__qdio_outbound_processing(q);
}
if (qdio_performance_stats) {
perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
perf_stats.outbound_cnt++;
}
qdio_perf_stat_inc(&perf_stats.outbound_cnt);
}
/* count must be 1 in iqdio */
@ -3589,33 +3566,67 @@ qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
return 0;
#define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
_OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c);
_OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c);
_OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c);
_OUTP_IT("Number of tasklet runs (total) : %lu\n",
perf_stats.tl_runs);
#ifdef CONFIG_64BIT
_OUTP_IT("Number of tasklet runs (total) : %li\n",
(long)atomic64_read(&perf_stats.tl_runs));
_OUTP_IT("Inbound tasklet runs tried/retried : %li/%li\n",
(long)atomic64_read(&perf_stats.inbound_tl_runs),
(long)atomic64_read(&perf_stats.inbound_tl_runs_resched));
_OUTP_IT("Inbound-thin tasklet runs tried/retried : %li/%li\n",
(long)atomic64_read(&perf_stats.inbound_thin_tl_runs),
(long)atomic64_read(&perf_stats.inbound_thin_tl_runs_resched));
_OUTP_IT("Outbound tasklet runs tried/retried : %li/%li\n",
(long)atomic64_read(&perf_stats.outbound_tl_runs),
(long)atomic64_read(&perf_stats.outbound_tl_runs_resched));
_OUTP_IT("\n");
_OUTP_IT("Number of SIGA sync's issued : %lu\n",
perf_stats.siga_syncs);
_OUTP_IT("Number of SIGA in's issued : %lu\n",
perf_stats.siga_ins);
_OUTP_IT("Number of SIGA out's issued : %lu\n",
perf_stats.siga_outs);
_OUTP_IT("Number of PCIs caught : %lu\n",
perf_stats.pcis);
_OUTP_IT("Number of adapter interrupts caught : %lu\n",
perf_stats.thinints);
_OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA) : %lu\n",
perf_stats.fast_reqs);
_OUTP_IT("Number of SIGA sync's issued : %li\n",
(long)atomic64_read(&perf_stats.siga_syncs));
_OUTP_IT("Number of SIGA in's issued : %li\n",
(long)atomic64_read(&perf_stats.siga_ins));
_OUTP_IT("Number of SIGA out's issued : %li\n",
(long)atomic64_read(&perf_stats.siga_outs));
_OUTP_IT("Number of PCIs caught : %li\n",
(long)atomic64_read(&perf_stats.pcis));
_OUTP_IT("Number of adapter interrupts caught : %li\n",
(long)atomic64_read(&perf_stats.thinints));
_OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA) : %li\n",
(long)atomic64_read(&perf_stats.fast_reqs));
_OUTP_IT("\n");
_OUTP_IT("Total time of all inbound actions (us) incl. UL : %lu\n",
perf_stats.inbound_time);
_OUTP_IT("Number of inbound transfers : %lu\n",
perf_stats.inbound_cnt);
_OUTP_IT("Total time of all outbound do_QDIOs (us) : %lu\n",
perf_stats.outbound_time);
_OUTP_IT("Number of do_QDIOs outbound : %lu\n",
perf_stats.outbound_cnt);
_OUTP_IT("Number of inbound transfers : %li\n",
(long)atomic64_read(&perf_stats.inbound_cnt));
_OUTP_IT("Number of do_QDIOs outbound : %li\n",
(long)atomic64_read(&perf_stats.outbound_cnt));
#else /* CONFIG_64BIT */
_OUTP_IT("Number of tasklet runs (total) : %i\n",
atomic_read(&perf_stats.tl_runs));
_OUTP_IT("Inbound tasklet runs tried/retried : %i/%i\n",
atomic_read(&perf_stats.inbound_tl_runs),
atomic_read(&perf_stats.inbound_tl_runs_resched));
_OUTP_IT("Inbound-thin tasklet runs tried/retried : %i/%i\n",
atomic_read(&perf_stats.inbound_thin_tl_runs),
atomic_read(&perf_stats.inbound_thin_tl_runs_resched));
_OUTP_IT("Outbound tasklet runs tried/retried : %i/%i\n",
atomic_read(&perf_stats.outbound_tl_runs),
atomic_read(&perf_stats.outbound_tl_runs_resched));
_OUTP_IT("\n");
_OUTP_IT("Number of SIGA sync's issued : %i\n",
atomic_read(&perf_stats.siga_syncs));
_OUTP_IT("Number of SIGA in's issued : %i\n",
atomic_read(&perf_stats.siga_ins));
_OUTP_IT("Number of SIGA out's issued : %i\n",
atomic_read(&perf_stats.siga_outs));
_OUTP_IT("Number of PCIs caught : %i\n",
atomic_read(&perf_stats.pcis));
_OUTP_IT("Number of adapter interrupts caught : %i\n",
atomic_read(&perf_stats.thinints));
_OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA) : %i\n",
atomic_read(&perf_stats.fast_reqs));
_OUTP_IT("\n");
_OUTP_IT("Number of inbound transfers : %i\n",
atomic_read(&perf_stats.inbound_cnt));
_OUTP_IT("Number of do_QDIOs outbound : %i\n",
atomic_read(&perf_stats.outbound_cnt));
#endif /* CONFIG_64BIT */
_OUTP_IT("\n");
return c;
@ -3642,8 +3653,6 @@ qdio_add_procfs_entry(void)
static void
qdio_remove_procfs_entry(void)
{
perf_stats.tl_runs=0;
if (!proc_perf_file_registration) /* means if it went ok earlier */
remove_proc_entry(QDIO_PERF,&proc_root);
}
@ -3671,13 +3680,38 @@ qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count
qdio_performance_stats = i;
if (i==0) {
/* reset perf. stat. info */
i_p_nc = 0;
i_p_c = 0;
ii_p_nc = 0;
ii_p_c = 0;
o_p_nc = 0;
o_p_c = 0;
memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
#ifdef CONFIG_64BIT
atomic64_set(&perf_stats.tl_runs, 0);
atomic64_set(&perf_stats.outbound_tl_runs, 0);
atomic64_set(&perf_stats.inbound_tl_runs, 0);
atomic64_set(&perf_stats.inbound_tl_runs_resched, 0);
atomic64_set(&perf_stats.inbound_thin_tl_runs, 0);
atomic64_set(&perf_stats.inbound_thin_tl_runs_resched,
0);
atomic64_set(&perf_stats.siga_outs, 0);
atomic64_set(&perf_stats.siga_ins, 0);
atomic64_set(&perf_stats.siga_syncs, 0);
atomic64_set(&perf_stats.pcis, 0);
atomic64_set(&perf_stats.thinints, 0);
atomic64_set(&perf_stats.fast_reqs, 0);
atomic64_set(&perf_stats.outbound_cnt, 0);
atomic64_set(&perf_stats.inbound_cnt, 0);
#else /* CONFIG_64BIT */
atomic_set(&perf_stats.tl_runs, 0);
atomic_set(&perf_stats.outbound_tl_runs, 0);
atomic_set(&perf_stats.inbound_tl_runs, 0);
atomic_set(&perf_stats.inbound_tl_runs_resched, 0);
atomic_set(&perf_stats.inbound_thin_tl_runs, 0);
atomic_set(&perf_stats.inbound_thin_tl_runs_resched, 0);
atomic_set(&perf_stats.siga_outs, 0);
atomic_set(&perf_stats.siga_ins, 0);
atomic_set(&perf_stats.siga_syncs, 0);
atomic_set(&perf_stats.pcis, 0);
atomic_set(&perf_stats.thinints, 0);
atomic_set(&perf_stats.fast_reqs, 0);
atomic_set(&perf_stats.outbound_cnt, 0);
atomic_set(&perf_stats.inbound_cnt, 0);
#endif /* CONFIG_64BIT */
}
} else {
QDIO_PRINT_WARN("QDIO performance_stats: write 0 or 1 to this file!\n");

48
drivers/s390/cio/qdio.h
View File

@ -406,21 +406,43 @@ do_clear_global_summary(void)
#define CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS 0x04
struct qdio_perf_stats {
unsigned long tl_runs;
#ifdef CONFIG_64BIT
atomic64_t tl_runs;
atomic64_t outbound_tl_runs;
atomic64_t outbound_tl_runs_resched;
atomic64_t inbound_tl_runs;
atomic64_t inbound_tl_runs_resched;
atomic64_t inbound_thin_tl_runs;
atomic64_t inbound_thin_tl_runs_resched;
unsigned long siga_outs;
unsigned long siga_ins;
unsigned long siga_syncs;
unsigned long pcis;
unsigned long thinints;
unsigned long fast_reqs;
atomic64_t siga_outs;
atomic64_t siga_ins;
atomic64_t siga_syncs;
atomic64_t pcis;
atomic64_t thinints;
atomic64_t fast_reqs;
__u64 start_time_outbound;
unsigned long outbound_cnt;
unsigned long outbound_time;
__u64 start_time_inbound;
unsigned long inbound_cnt;
unsigned long inbound_time;
atomic64_t outbound_cnt;
atomic64_t inbound_cnt;
#else /* CONFIG_64BIT */
atomic_t tl_runs;
atomic_t outbound_tl_runs;
atomic_t outbound_tl_runs_resched;
atomic_t inbound_tl_runs;
atomic_t inbound_tl_runs_resched;
atomic_t inbound_thin_tl_runs;
atomic_t inbound_thin_tl_runs_resched;
atomic_t siga_outs;
atomic_t siga_ins;
atomic_t siga_syncs;
atomic_t pcis;
atomic_t thinints;
atomic_t fast_reqs;
atomic_t outbound_cnt;
atomic_t inbound_cnt;
#endif /* CONFIG_64BIT */
};
/* unlikely as the later the better */