lkml.org 
[lkml]   [2016]   [Jul]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[RFC PATCH 08/30] net/netpolicy: set and remove irq affinity
    Date
    From: Kan Liang <kan.liang@intel.com>

    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 <kan.liang@intel.com>
    ---
    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"
    };
    --
    2.5.5
    \
     
     \ /
      Last update: 2016-07-18 17:21    [W:4.527 / U:0.056 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site