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event/octeontx: optimize timer adapter resolution parameters

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When application sets `RTE_EVENT_TIMER_ADAPTER_F_ADJUST_RES` flag
while creating adapter underlying driver is free to optimize the
resolution for best possible configuration.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
This commit is contained in:
Pavan Nikhilesh 2018-04-10 02:30:33 +05:30 committed by Thomas Monjalon
parent 0896f7e080
commit 4cec5aae58
2 changed files with 57 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/event/octeontx/timvf_evdev.c
View File

@ -82,6 +82,45 @@ timvf_get_start_cyc(uint64_t *now, uint8_t ring_id)
return octeontx_mbox_send(&hdr, NULL, 0, now, sizeof(uint64_t));
}
static int
optimize_bucket_parameters(struct timvf_ring *timr)
{
uint32_t hbkts;
uint32_t lbkts;
uint64_t tck_nsec;
hbkts = rte_align32pow2(timr->nb_bkts);
tck_nsec = RTE_ALIGN_MUL_CEIL(timr->max_tout / (hbkts - 1), 10);
if ((tck_nsec < 1000 || hbkts > TIM_MAX_BUCKETS))
hbkts = 0;
lbkts = rte_align32prevpow2(timr->nb_bkts);
tck_nsec = RTE_ALIGN_MUL_CEIL((timr->max_tout / (lbkts - 1)), 10);
if ((tck_nsec < 1000 || hbkts > TIM_MAX_BUCKETS))
lbkts = 0;
if (!hbkts && !lbkts)
return 0;
if (!hbkts) {
timr->nb_bkts = lbkts;
goto end;
} else if (!lbkts) {
timr->nb_bkts = hbkts;
goto end;
}
timr->nb_bkts = (hbkts - timr->nb_bkts) <
(timr->nb_bkts - lbkts) ? hbkts : lbkts;
end:
timr->get_target_bkt = bkt_and;
timr->tck_nsec = RTE_ALIGN_MUL_CEIL((timr->max_tout /
(timr->nb_bkts - 1)), 10);
return 1;
}
static int
timvf_ring_start(const struct rte_event_timer_adapter *adptr)
{
@ -204,7 +243,7 @@ timvf_ring_create(struct rte_event_timer_adapter *adptr)
timr->clk_src = (int) rcfg->clk_src;
timr->tim_ring_id = adptr->data->id;
timr->tck_nsec = rcfg->timer_tick_ns;
timr->tck_nsec = RTE_ALIGN_MUL_CEIL(rcfg->timer_tick_ns, 10);
timr->max_tout = rcfg->max_tmo_ns;
timr->nb_bkts = (timr->max_tout / timr->tck_nsec);
timr->vbar0 = timvf_bar(timr->tim_ring_id, 0);
@ -214,6 +253,17 @@ timvf_ring_create(struct rte_event_timer_adapter *adptr)
timr->nb_chunks = nb_timers / nb_chunk_slots;
/* Try to optimize the bucket parameters. */
if ((rcfg->flags & RTE_EVENT_TIMER_ADAPTER_F_ADJUST_RES)
&& !rte_is_power_of_2(timr->nb_bkts)) {
if (optimize_bucket_parameters(timr)) {
timvf_log_info("Optimized configured values");
timvf_log_dbg("nb_bkts : %"PRIu32"", timr->nb_bkts);
timvf_log_dbg("tck_nsec : %"PRIu64"", timr->tck_nsec);
} else
timvf_log_info("Failed to Optimize configured values");
}
if (rcfg->flags & RTE_EVENT_TIMER_ADAPTER_F_SP_PUT) {
mp_flags = MEMPOOL_F_SP_PUT | MEMPOOL_F_SC_GET;
timvf_log_info("Using single producer mode");

6
drivers/event/octeontx/timvf_evdev.h
View File

@ -190,6 +190,12 @@ bkt_mod(const uint32_t rel_bkt, const uint32_t nb_bkts)
return rel_bkt % nb_bkts;
}
static __rte_always_inline uint32_t
bkt_and(uint32_t rel_bkt, uint32_t nb_bkts)
{
return rel_bkt & (nb_bkts - 1);
}
int timvf_info(struct timvf_info *tinfo);
void *timvf_bar(uint8_t id, uint8_t bar);
int timvf_timer_adapter_caps_get(const struct rte_eventdev *dev, uint64_t flags,