Re: [PATCH iwl-net] idpf: decrease statistics refresh interval
From: Brian Vazquez
Date: Thu Jun 11 2026 - 11:11:54 EST
Tested-by: Brian Vazquez <brianvv@xxxxxxxxxx>
Before patch:
# sar -n DEV 1 | grep eth1
08:09:51 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:09:52 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:09:53 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:09:54 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:09:55 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:09:56 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:09:57 eth1 4225.00 1801.00 736.18 1125.49
0.00 0.00 0.00 0.00
08:09:58 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:09:59 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:10:00 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:10:01 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:10:02 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:10:03 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:10:04 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:10:05 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:10:06 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:10:07 eth1 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
08:10:08 eth1 3788.00 1435.00 628.26 535.24
0.00 0.00 0.00 0.00
After patch (you can now see background traffic reported right away!):
# sar -n DEV 1 | grep eth1
08:08:33 eth1 527.00 443.00 261.74 76.69
0.00 0.00 0.00 0.00
08:08:34 eth1 440.00 423.00 101.89 78.75
0.00 0.00 0.00 0.00
08:08:35 eth1 356.00 353.00 68.68 57.02
0.00 0.00 0.00 0.00
08:08:36 eth1 437.00 462.00 114.18 124.07
0.00 0.00 0.00 0.00
08:08:37 eth1 377.00 383.00 61.40 65.97
0.00 0.00 0.00 0.00
08:08:38 eth1 335.00 337.00 83.08 75.39
0.00 0.00 0.00 0.00
08:08:39 eth1 387.00 392.00 58.95 74.58
0.00 0.00 0.00 0.00
08:08:40 eth1 351.00 371.00 51.39 103.25
0.00 0.00 0.00 0.00
08:08:41 eth1 339.00 338.00 55.38 54.91
0.00 0.00 0.00 0.00
08:08:42 eth1 324.00 328.00 54.15 55.71
0.00 0.00 0.00 0.00
On Wed, Jun 10, 2026 at 8:24 PM Danny Gonzalez <digonzal@xxxxxxxxxx> wrote:
>
> The default 10s statistics refresh interval is too slow for real-time
> monitoring and causes network selftests (e.g., uso.py) to fail when
> verifying traffic immediately after transmission.
>
> A 10s delay also causes aliasing in telemetry tools polling at shorter
> intervals (e.g., 5s), leading to inaccurate rate calculations on
> high-throughput NICs.
>
> Decrease the refresh interval to 250ms to ensure fresh stats and fix
> test failures.
>
> Tested: drivers/net/hw:uso.py now passes
> Fixes: a251eee62133 ("idpf: add SRIOV support and other ndo_ops")
> Signed-off-by: Danny Gonzalez <digonzal@xxxxxxxxxx>
> ---
> drivers/net/ethernet/intel/idpf/idpf_lib.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/idpf/idpf_lib.c b/drivers/net/ethernet/intel/idpf/idpf_lib.c
> index cf966fe6c759..e2890d219431 100644
> --- a/drivers/net/ethernet/intel/idpf/idpf_lib.c
> +++ b/drivers/net/ethernet/intel/idpf/idpf_lib.c
> @@ -1364,7 +1364,7 @@ void idpf_statistics_task(struct work_struct *work)
> }
>
> queue_delayed_work(adapter->stats_wq, &adapter->stats_task,
> - msecs_to_jiffies(10000));
> + msecs_to_jiffies(250));
> }
>
> /**
> --
> 2.54.0.1099.g489fc7bff1-goog
>