2023-11-27 05:32:39

by Suman Ghosh

Subject: [net PATCH] octeontx2-pf: Fix updation of adaptive interrupt coalescing

From: Naveen Mamindlapalli <[email protected]>

The current adaptive interrupt coalescing code updates only rx
packet stats for dim algorithm. This patch fixes that and also updates
tx packet stats which will be useful when there is only tx traffic.
Also moved configuring hardware adaptive interrupt setting to
driver dim callback.

Signed-off-by: Naveen Mamindlapalli <[email protected]>
---
.../ethernet/marvell/octeontx2/nic/otx2_pf.c | 9 +++++++++
.../marvell/octeontx2/nic/otx2_txrx.c | 20 +++++++++----------
2 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
index ba95ac913274..6c0e0e2c235b 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
@@ -1685,6 +1685,14 @@ static void otx2_do_set_rx_mode(struct otx2_nic *pf)
mutex_unlock(&pf->mbox.lock);
}

+static void otx2_set_irq_coalesce(struct otx2_nic *pfvf)
+{
+ int cint;
+
+ for (cint = 0; cint < pfvf->hw.cint_cnt; cint++)
+ otx2_config_irq_coalescing(pfvf, cint);
+}
+
static void otx2_dim_work(struct work_struct *w)
{
struct dim_cq_moder cur_moder;
@@ -1700,6 +1708,7 @@ static void otx2_dim_work(struct work_struct *w)
CQ_TIMER_THRESH_MAX : cur_moder.usec;
pfvf->hw.cq_ecount_wait = (cur_moder.pkts > NAPI_POLL_WEIGHT) ?
NAPI_POLL_WEIGHT : cur_moder.pkts;
+ otx2_set_irq_coalesce(pfvf);
dim->state = DIM_START_MEASURE;
}

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
index 6ee15f3c25ed..4d519ea833b2 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
@@ -512,11 +512,18 @@ static void otx2_adjust_adaptive_coalese(struct otx2_nic *pfvf, struct otx2_cq_p
{
struct dim_sample dim_sample;
u64 rx_frames, rx_bytes;
+ u64 tx_frames, tx_bytes;

rx_frames = OTX2_GET_RX_STATS(RX_BCAST) + OTX2_GET_RX_STATS(RX_MCAST) +
OTX2_GET_RX_STATS(RX_UCAST);
rx_bytes = OTX2_GET_RX_STATS(RX_OCTS);
- dim_update_sample(pfvf->napi_events, rx_frames, rx_bytes, &dim_sample);
+ tx_bytes = OTX2_GET_TX_STATS(TX_OCTS);
+ tx_frames = OTX2_GET_TX_STATS(TX_UCAST);
+
+ dim_update_sample(pfvf->napi_events,
+ rx_frames + tx_frames,
+ rx_bytes + tx_bytes,
+ &dim_sample);
net_dim(&cq_poll->dim, dim_sample);
}

@@ -558,16 +565,9 @@ int otx2_napi_handler(struct napi_struct *napi, int budget)
if (pfvf->flags & OTX2_FLAG_INTF_DOWN)
return workdone;

- /* Check for adaptive interrupt coalesce */
- if (workdone != 0 &&
- ((pfvf->flags & OTX2_FLAG_ADPTV_INT_COAL_ENABLED) ==
- OTX2_FLAG_ADPTV_INT_COAL_ENABLED)) {
- /* Adjust irq coalese using net_dim */
+ /* Adjust irq coalese using net_dim */
+ if (pfvf->flags & OTX2_FLAG_ADPTV_INT_COAL_ENABLED)
otx2_adjust_adaptive_coalese(pfvf, cq_poll);
- /* Update irq coalescing */
- for (i = 0; i < pfvf->hw.cint_cnt; i++)
- otx2_config_irq_coalescing(pfvf, i);
- }

if (unlikely(!filled_cnt)) {
struct refill_work *work;
--
2.25.1

2023-11-28 02:37:18

by Jakub Kicinski

Subject: Re: [net PATCH] octeontx2-pf: Fix updation of adaptive interrupt coalescing

On Mon, 27 Nov 2023 10:58:11 +0530 Suman Ghosh wrote:
> The current adaptive interrupt coalescing code updates only rx
> packet stats for dim algorithm. This patch fixes that and also updates
> tx packet stats which will be useful when there is only tx traffic.

Doesn't sound like a fix, more of net-next material.

> Also moved configuring hardware adaptive interrupt setting to
> driver dim callback.

Also this should be a separate patch.
--
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