diff options
author | Huazhong Tan <tanhuazhong@huawei.com> | 2021-05-25 12:22:03 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2021-05-26 01:25:37 +0300 |
commit | 307ea4ce3edd3f7d1130d3c35955aa77063296cc (patch) | |
tree | 6e5a05cfe3e36ff894d1981beb4ae43ab06720a5 | |
parent | ccc882f0d838cb45a1a78ea4e48c219887f920dc (diff) | |
download | linux-307ea4ce3edd3f7d1130d3c35955aa77063296cc.tar.xz |
net: hns3: switch to dim algorithm for adaptive interrupt moderation
The Linux kernel has support for a dynamic interrupt moderation
algorithm known as "dimlib". Replace the custom driver-specific
implementation of dynamic interrupt moderation with the kernel's
algorithm.
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | drivers/net/ethernet/hisilicon/Kconfig | 1 | ||||
-rw-r--r-- | drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 193 | ||||
-rw-r--r-- | drivers/net/ethernet/hisilicon/hns3/hns3_enet.h | 4 |
3 files changed, 73 insertions, 125 deletions
diff --git a/drivers/net/ethernet/hisilicon/Kconfig b/drivers/net/ethernet/hisilicon/Kconfig index 44f9279cdde1..fa6025dc4cdb 100644 --- a/drivers/net/ethernet/hisilicon/Kconfig +++ b/drivers/net/ethernet/hisilicon/Kconfig @@ -130,6 +130,7 @@ config HNS3_ENET default m depends on 64BIT && PCI depends on INET + select DIMLIB help This selects the Ethernet Driver for Hisilicon Network Subsystem 3 for hip08 family of SoCs. This module depends upon HNAE3 driver to access the HNAE3 diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index de0e2d215879..f256ed18b4ab 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -368,6 +368,7 @@ static irqreturn_t hns3_irq_handle(int irq, void *vector) struct hns3_enet_tqp_vector *tqp_vector = vector; napi_schedule_irqoff(&tqp_vector->napi); + tqp_vector->event_cnt++; return IRQ_HANDLED; } @@ -471,6 +472,8 @@ static void hns3_vector_disable(struct hns3_enet_tqp_vector *tqp_vector) disable_irq(tqp_vector->vector_irq); napi_disable(&tqp_vector->napi); + cancel_work_sync(&tqp_vector->rx_group.dim.work); + cancel_work_sync(&tqp_vector->tx_group.dim.work); } void hns3_set_vector_coalesce_rl(struct hns3_enet_tqp_vector *tqp_vector, @@ -3772,139 +3775,30 @@ out: return recv_pkts; } -static bool hns3_get_new_flow_lvl(struct hns3_enet_ring_group *ring_group) +static void hns3_update_rx_int_coalesce(struct hns3_enet_tqp_vector *tqp_vector) { -#define HNS3_RX_LOW_BYTE_RATE 10000 -#define HNS3_RX_MID_BYTE_RATE 20000 -#define HNS3_RX_ULTRA_PACKET_RATE 40 - - enum hns3_flow_level_range new_flow_level; - struct hns3_enet_tqp_vector *tqp_vector; - int packets_per_msecs, bytes_per_msecs; - u32 time_passed_ms; - - tqp_vector = ring_group->ring->tqp_vector; - time_passed_ms = - jiffies_to_msecs(jiffies - tqp_vector->last_jiffies); - if (!time_passed_ms) - return false; - - do_div(ring_group->total_packets, time_passed_ms); - packets_per_msecs = ring_group->total_packets; - - do_div(ring_group->total_bytes, time_passed_ms); - bytes_per_msecs = ring_group->total_bytes; - - new_flow_level = ring_group->coal.flow_level; - - /* Simple throttlerate management - * 0-10MB/s lower (50000 ints/s) - * 10-20MB/s middle (20000 ints/s) - * 20-1249MB/s high (18000 ints/s) - * > 40000pps ultra (8000 ints/s) - */ - switch (new_flow_level) { - case HNS3_FLOW_LOW: - if (bytes_per_msecs > HNS3_RX_LOW_BYTE_RATE) - new_flow_level = HNS3_FLOW_MID; - break; - case HNS3_FLOW_MID: - if (bytes_per_msecs > HNS3_RX_MID_BYTE_RATE) - new_flow_level = HNS3_FLOW_HIGH; - else if (bytes_per_msecs <= HNS3_RX_LOW_BYTE_RATE) - new_flow_level = HNS3_FLOW_LOW; - break; - case HNS3_FLOW_HIGH: - case HNS3_FLOW_ULTRA: - default: - if (bytes_per_msecs <= HNS3_RX_MID_BYTE_RATE) - new_flow_level = HNS3_FLOW_MID; - break; - } - - if (packets_per_msecs > HNS3_RX_ULTRA_PACKET_RATE && - &tqp_vector->rx_group == ring_group) - new_flow_level = HNS3_FLOW_ULTRA; - - ring_group->total_bytes = 0; - ring_group->total_packets = 0; - ring_group->coal.flow_level = new_flow_level; - - return true; -} - -static bool hns3_get_new_int_gl(struct hns3_enet_ring_group *ring_group) -{ - struct hns3_enet_tqp_vector *tqp_vector; - u16 new_int_gl; - - if (!ring_group->ring) - return false; - - tqp_vector = ring_group->ring->tqp_vector; - if (!tqp_vector->last_jiffies) - return false; - - if (ring_group->total_packets == 0) { - ring_group->coal.int_gl = HNS3_INT_GL_50K; - ring_group->coal.flow_level = HNS3_FLOW_LOW; - return true; - } - - if (!hns3_get_new_flow_lvl(ring_group)) - return false; + struct hns3_enet_ring_group *rx_group = &tqp_vector->rx_group; + struct dim_sample sample = {}; - new_int_gl = ring_group->coal.int_gl; - switch (ring_group->coal.flow_level) { - case HNS3_FLOW_LOW: - new_int_gl = HNS3_INT_GL_50K; - break; - case HNS3_FLOW_MID: - new_int_gl = HNS3_INT_GL_20K; - break; - case HNS3_FLOW_HIGH: - new_int_gl = HNS3_INT_GL_18K; - break; - case HNS3_FLOW_ULTRA: - new_int_gl = HNS3_INT_GL_8K; - break; - default: - break; - } + if (!rx_group->coal.adapt_enable) + return; - if (new_int_gl != ring_group->coal.int_gl) { - ring_group->coal.int_gl = new_int_gl; - return true; - } - return false; + dim_update_sample(tqp_vector->event_cnt, rx_group->total_packets, + rx_group->total_bytes, &sample); + net_dim(&rx_group->dim, sample); } -static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector) +static void hns3_update_tx_int_coalesce(struct hns3_enet_tqp_vector *tqp_vector) { - struct hns3_enet_ring_group *rx_group = &tqp_vector->rx_group; struct hns3_enet_ring_group *tx_group = &tqp_vector->tx_group; - bool rx_update, tx_update; + struct dim_sample sample = {}; - /* update param every 1000ms */ - if (time_before(jiffies, - tqp_vector->last_jiffies + msecs_to_jiffies(1000))) + if (!tx_group->coal.adapt_enable) return; - if (rx_group->coal.adapt_enable) { - rx_update = hns3_get_new_int_gl(rx_group); - if (rx_update) - hns3_set_vector_coalesce_rx_gl(tqp_vector, - rx_group->coal.int_gl); - } - - if (tx_group->coal.adapt_enable) { - tx_update = hns3_get_new_int_gl(tx_group); - if (tx_update) - hns3_set_vector_coalesce_tx_gl(tqp_vector, - tx_group->coal.int_gl); - } - - tqp_vector->last_jiffies = jiffies; + dim_update_sample(tqp_vector->event_cnt, tx_group->total_packets, + tx_group->total_bytes, &sample); + net_dim(&tx_group->dim, sample); } static int hns3_nic_common_poll(struct napi_struct *napi, int budget) @@ -3949,7 +3843,9 @@ static int hns3_nic_common_poll(struct napi_struct *napi, int budget) if (napi_complete(napi) && likely(!test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) { - hns3_update_new_int_gl(tqp_vector); + hns3_update_rx_int_coalesce(tqp_vector); + hns3_update_tx_int_coalesce(tqp_vector); + hns3_mask_vector_irq(tqp_vector, 1); } @@ -4080,6 +3976,54 @@ static void hns3_nic_set_cpumask(struct hns3_nic_priv *priv) } } +static void hns3_rx_dim_work(struct work_struct *work) +{ + struct dim *dim = container_of(work, struct dim, work); + struct hns3_enet_ring_group *group = container_of(dim, + struct hns3_enet_ring_group, dim); + struct hns3_enet_tqp_vector *tqp_vector = group->ring->tqp_vector; + struct dim_cq_moder cur_moder = + net_dim_get_rx_moderation(dim->mode, dim->profile_ix); + + hns3_set_vector_coalesce_rx_gl(group->ring->tqp_vector, cur_moder.usec); + tqp_vector->rx_group.coal.int_gl = cur_moder.usec; + + if (cur_moder.pkts < tqp_vector->rx_group.coal.int_ql_max) { + hns3_set_vector_coalesce_rx_ql(tqp_vector, cur_moder.pkts); + tqp_vector->rx_group.coal.int_ql = cur_moder.pkts; + } + + dim->state = DIM_START_MEASURE; +} + +static void hns3_tx_dim_work(struct work_struct *work) +{ + struct dim *dim = container_of(work, struct dim, work); + struct hns3_enet_ring_group *group = container_of(dim, + struct hns3_enet_ring_group, dim); + struct hns3_enet_tqp_vector *tqp_vector = group->ring->tqp_vector; + struct dim_cq_moder cur_moder = + net_dim_get_tx_moderation(dim->mode, dim->profile_ix); + + hns3_set_vector_coalesce_tx_gl(tqp_vector, cur_moder.usec); + tqp_vector->tx_group.coal.int_gl = cur_moder.usec; + + if (cur_moder.pkts < tqp_vector->tx_group.coal.int_ql_max) { + hns3_set_vector_coalesce_tx_ql(tqp_vector, cur_moder.pkts); + tqp_vector->tx_group.coal.int_ql = cur_moder.pkts; + } + + dim->state = DIM_START_MEASURE; +} + +static void hns3_nic_init_dim(struct hns3_enet_tqp_vector *tqp_vector) +{ + INIT_WORK(&tqp_vector->rx_group.dim.work, hns3_rx_dim_work); + tqp_vector->rx_group.dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE; + INIT_WORK(&tqp_vector->tx_group.dim.work, hns3_tx_dim_work); + tqp_vector->tx_group.dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE; +} + static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv) { struct hnae3_handle *h = priv->ae_handle; @@ -4093,6 +4037,7 @@ static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv) tqp_vector = &priv->tqp_vector[i]; hns3_vector_coalesce_init_hw(tqp_vector, priv); tqp_vector->num_tqps = 0; + hns3_nic_init_dim(tqp_vector); } for (i = 0; i < h->kinfo.num_tqps; i++) { diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h index 79ff2fa61d47..b038441907f9 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h @@ -4,6 +4,7 @@ #ifndef __HNS3_ENET_H #define __HNS3_ENET_H +#include <linux/dim.h> #include <linux/if_vlan.h> #include "hnae3.h" @@ -482,6 +483,7 @@ struct hns3_enet_ring_group { u64 total_packets; /* total packets processed this group */ u16 count; struct hns3_enet_coalesce coal; + struct dim dim; }; struct hns3_enet_tqp_vector { @@ -503,7 +505,7 @@ struct hns3_enet_tqp_vector { char name[HNAE3_INT_NAME_LEN]; - unsigned long last_jiffies; + u64 event_cnt; } ____cacheline_internodealigned_in_smp; struct hns3_nic_priv { |