From: Ursula Braun 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 Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/qdio.c | 240 +++++++++++++++++++++++++++--------------------- drivers/s390/cio/qdio.h | 50 +++++++--- 2 files changed, 173 insertions(+), 117 deletions(-) Index: quilt-2.6/drivers/s390/cio/qdio.c =================================================================== --- quilt-2.6.orig/drivers/s390/cio/qdio.c 2007-05-04 18:48:36.000000000 +0200 +++ quilt-2.6/drivers/s390/cio/qdio.c 2007-05-04 18:50:15.000000000 +0200 @@ -69,7 +69,6 @@ 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 @@ } /***************** 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_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 @@ __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_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 @@ 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 @@ } 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 @@ { 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 @@ 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 @@ */ 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_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 @@ for (i=0;ino_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 @@ 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 @@ } 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 @@ 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 @@ { 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 @@ { 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 @@ 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;ino_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 @@ 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 @@ 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 @@ 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 @@ __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 @@ 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 @@ 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 = 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"); Index: quilt-2.6/drivers/s390/cio/qdio.h =================================================================== --- quilt-2.6.orig/drivers/s390/cio/qdio.h 2007-05-04 18:48:36.000000000 +0200 +++ quilt-2.6/drivers/s390/cio/qdio.h 2007-05-04 18:50:15.000000000 +0200 @@ -406,21 +406,43 @@ #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; + + atomic64_t siga_outs; + atomic64_t siga_ins; + atomic64_t siga_syncs; + atomic64_t pcis; + atomic64_t thinints; + atomic64_t fast_reqs; + + 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; - unsigned long siga_outs; - unsigned long siga_ins; - unsigned long siga_syncs; - unsigned long pcis; - unsigned long thinints; - unsigned long 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; + atomic_t outbound_cnt; + atomic_t inbound_cnt; +#endif /* CONFIG_64BIT */ }; /* unlikely as the later the better */ -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/