* [PATCH] event/cnxk: arm early to account for software delays
@ 2022-12-13 15:10 Shijith Thotton
2023-01-18 12:49 ` Jerin Jacob
0 siblings, 1 reply; 2+ messages in thread
From: Shijith Thotton @ 2022-12-13 15:10 UTC (permalink / raw)
To: jerinj; +Cc: Shijith Thotton, dev, pbhagavatula
Arm a bucket early to account for software delays in timer arm routine.
Signed-off-by: Shijith Thotton <sthotton@marvell.com>
---
drivers/event/cnxk/cnxk_tim_worker.h | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/event/cnxk/cnxk_tim_worker.h b/drivers/event/cnxk/cnxk_tim_worker.h
index eda84c6f31..16909ef06d 100644
--- a/drivers/event/cnxk/cnxk_tim_worker.h
+++ b/drivers/event/cnxk/cnxk_tim_worker.h
@@ -133,11 +133,13 @@ cnxk_tim_get_target_bucket(struct cnxk_tim_ring *const tim_ring,
{
const uint64_t bkt_cyc =
tim_ring->tick_fn(tim_ring->tbase) - tim_ring->ring_start_cyc;
- uint64_t bucket =
- rte_reciprocal_divide_u64(bkt_cyc, &tim_ring->fast_div) +
- rel_bkt;
+ uint64_t bucket = rte_reciprocal_divide_u64(bkt_cyc, &tim_ring->fast_div);
uint64_t mirr_bucket = 0;
+ if ((bkt_cyc - bucket * tim_ring->tck_int) < tim_ring->tck_int / 2)
+ bucket--;
+
+ bucket += rel_bkt;
bucket = cnxk_tim_bkt_fast_mod(bucket, tim_ring->nb_bkts,
tim_ring->fast_bkt);
mirr_bucket =
--
2.25.1
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] event/cnxk: arm early to account for software delays
2022-12-13 15:10 [PATCH] event/cnxk: arm early to account for software delays Shijith Thotton
@ 2023-01-18 12:49 ` Jerin Jacob
0 siblings, 0 replies; 2+ messages in thread
From: Jerin Jacob @ 2023-01-18 12:49 UTC (permalink / raw)
To: Shijith Thotton; +Cc: jerinj, dev, pbhagavatula
On Tue, Dec 13, 2022 at 8:41 PM Shijith Thotton <sthotton@marvell.com> wrote:
>
> Arm a bucket early to account for software delays in timer arm routine.
>
> Signed-off-by: Shijith Thotton <sthotton@marvell.com>
Updated the git commit title as follows and applied to
dpdk-next-net-mrvl/for-next-net. Thanks
event/cnxk: arm timer early to account for software delays
> ---
> drivers/event/cnxk/cnxk_tim_worker.h | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/event/cnxk/cnxk_tim_worker.h b/drivers/event/cnxk/cnxk_tim_worker.h
> index eda84c6f31..16909ef06d 100644
> --- a/drivers/event/cnxk/cnxk_tim_worker.h
> +++ b/drivers/event/cnxk/cnxk_tim_worker.h
> @@ -133,11 +133,13 @@ cnxk_tim_get_target_bucket(struct cnxk_tim_ring *const tim_ring,
> {
> const uint64_t bkt_cyc =
> tim_ring->tick_fn(tim_ring->tbase) - tim_ring->ring_start_cyc;
> - uint64_t bucket =
> - rte_reciprocal_divide_u64(bkt_cyc, &tim_ring->fast_div) +
> - rel_bkt;
> + uint64_t bucket = rte_reciprocal_divide_u64(bkt_cyc, &tim_ring->fast_div);
> uint64_t mirr_bucket = 0;
>
> + if ((bkt_cyc - bucket * tim_ring->tck_int) < tim_ring->tck_int / 2)
> + bucket--;
> +
> + bucket += rel_bkt;
> bucket = cnxk_tim_bkt_fast_mod(bucket, tim_ring->nb_bkts,
> tim_ring->fast_bkt);
> mirr_bucket =
> --
> 2.25.1
>
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