[RFC V2 PATCH 06/25] net/netpolicy: set and remove IRQ affinity
From: <hidden>
Date: 2016-08-04 19:13:10
Also in:
lkml
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Kan Liang <redacted> This patches introduces functions to set and remove IRQ affinity according to cpu and queue mapping. The functions will not record the previous affinity status. After a set/remove cycles, it will set the affinity on all online CPU with IRQ balance enabling. Signed-off-by: Kan Liang <redacted> --- net/core/netpolicy.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+)
diff --git a/net/core/netpolicy.c b/net/core/netpolicy.c
index ff7fc04..c44818d 100644
--- a/net/core/netpolicy.c
+++ b/net/core/netpolicy.c@@ -29,6 +29,7 @@ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/init.h> +#include <linux/irq.h> #include <linux/seq_file.h> #include <linux/proc_fs.h> #include <linux/uaccess.h>
@@ -128,6 +129,38 @@ err: return -ENOMEM; } +static void netpolicy_clear_affinity(struct net_device *dev) +{ + struct netpolicy_sys_info *s_info = &dev->netpolicy->sys_info; + u32 i; + + for (i = 0; i < s_info->avail_rx_num; i++) { + irq_clear_status_flags(s_info->rx[i].irq, IRQ_NO_BALANCING); + irq_set_affinity_hint(s_info->rx[i].irq, cpu_online_mask); + } + + for (i = 0; i < s_info->avail_tx_num; i++) { + irq_clear_status_flags(s_info->tx[i].irq, IRQ_NO_BALANCING); + irq_set_affinity_hint(s_info->tx[i].irq, cpu_online_mask); + } +} + +static void netpolicy_set_affinity(struct net_device *dev) +{ + struct netpolicy_sys_info *s_info = &dev->netpolicy->sys_info; + u32 i; + + for (i = 0; i < s_info->avail_rx_num; i++) { + irq_set_status_flags(s_info->rx[i].irq, IRQ_NO_BALANCING); + irq_set_affinity_hint(s_info->rx[i].irq, cpumask_of(s_info->rx[i].cpu)); + } + + for (i = 0; i < s_info->avail_tx_num; i++) { + irq_set_status_flags(s_info->tx[i].irq, IRQ_NO_BALANCING); + irq_set_affinity_hint(s_info->tx[i].irq, cpumask_of(s_info->tx[i].cpu)); + } +} + const char *policy_name[NET_POLICY_MAX] = { "NONE" };
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2.5.5