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| author | Paul Barker <paul.barker.ct@bp.renesas.com> | 2024-06-04 10:28:23 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2024-06-06 10:59:58 +0300 |
| commit | 7b39c1814ce3bcdf95d026bbb27322218840a27d (patch) | |
| tree | b8c4d91bcb86e8e404a6c3b2e3391d0d3db6543d /drivers/net/ethernet/renesas | |
| parent | 3ee43f09cb2cd7643d5a4bfbc78a9f75f6a563af (diff) | |
| download | linux-7b39c1814ce3bcdf95d026bbb27322218840a27d.tar.xz | |
net: ravb: Enable SW IRQ Coalescing for GbEth
Software IRQ Coalescing is required to improve network stack performance
in the RZ/G2L SoC family and the RZ/G3S SoC, i.e. the SoCs which use the
GbEth IP.
This patch gives the following improvements during testing with iperf3:
* RZ/G2L:
* TCP RX: same bandwidth with -6% CPU load (76% -> 71%)
* UDP RX: same bandwidth with -10% CPU load (99% -> 89%)
* RZ/G2UL:
* UDP RX: +4200% bandwidth (1.23Mbps -> 53Mbps)
* RZ/G3S:
* UDP RX: +425% bandwidth (1.23Mbps -> 6.46Mbps)
The improvement of UDP RX bandwidth for the single core SoCs (RZ/G2UL &
RZ/G3S) is particularly critical.
Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers/net/ethernet/renesas')
| -rw-r--r-- | drivers/net/ethernet/renesas/ravb.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/renesas/ravb_main.c | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h index 71de2a7aa27c..6a7aa7dd17e6 100644 --- a/drivers/net/ethernet/renesas/ravb.h +++ b/drivers/net/ethernet/renesas/ravb.h @@ -1054,6 +1054,7 @@ struct ravb_hw_info { u32 rx_max_desc_use; u32 rx_desc_size; unsigned aligned_tx: 1; + unsigned coalesce_irqs:1; /* Needs software IRQ coalescing */ /* hardware features */ unsigned internal_delay:1; /* AVB-DMAC has internal delays */ diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index e8c3f48b213d..2c24cb0271af 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -2667,6 +2667,7 @@ static const struct ravb_hw_info gbeth_hw_info = { .rx_max_desc_use = 4080, .rx_desc_size = sizeof(struct ravb_rx_desc), .aligned_tx = 1, + .coalesce_irqs = 1, .tx_counters = 1, .carrier_counters = 1, .half_duplex = 1, @@ -2943,6 +2944,9 @@ static int ravb_probe(struct platform_device *pdev) if (info->nc_queues) netif_napi_add(ndev, &priv->napi[RAVB_NC], ravb_poll); + if (info->coalesce_irqs) + netdev_sw_irq_coalesce_default_on(ndev); + /* Network device register */ error = register_netdev(ndev); if (error) |