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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-11-29 08:14:37 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-12-01 12:47:42 -0800 |
| commit | f2cd2d3e9b3ef960612e362f0ad129d735452df2 (patch) | |
| tree | bef1868cfc7dc66de7b2430a4b47b12bced05ec1 /net/core/net-sysfs.c | |
| parent | 0793f83f0ec2142d06abe53570417c8d95e0310a (diff) | |
| download | linux-f2cd2d3e9b3ef960612e362f0ad129d735452df2.tar.gz linux-f2cd2d3e9b3ef960612e362f0ad129d735452df2.tar.bz2 linux-f2cd2d3e9b3ef960612e362f0ad129d735452df2.zip | |
net sched: use xps information for qdisc NUMA affinity
Allocate qdisc memory according to NUMA properties of cpus included in
xps map.
To be effective, qdisc should be (re)setup after changes
of /sys/class/net/eth<n>/queues/tx-<n>/xps_cpus
I added a numa_node field in struct netdev_queue, containing NUMA node
if all cpus included in xps_cpus share same node, else -1.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Cc: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/net-sysfs.c')
| -rw-r--r-- | net/core/net-sysfs.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index f85cee3d869e..85e8b5326dd6 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -913,6 +913,7 @@ static ssize_t store_xps_map(struct netdev_queue *queue, struct xps_map *map, *new_map; struct xps_dev_maps *dev_maps, *new_dev_maps; int nonempty = 0; + int numa_node = -2; if (!capable(CAP_NET_ADMIN)) return -EPERM; @@ -953,7 +954,14 @@ static ssize_t store_xps_map(struct netdev_queue *queue, pos = map_len = alloc_len = 0; need_set = cpu_isset(cpu, *mask) && cpu_online(cpu); - +#ifdef CONFIG_NUMA + if (need_set) { + if (numa_node == -2) + numa_node = cpu_to_node(cpu); + else if (numa_node != cpu_to_node(cpu)) + numa_node = -1; + } +#endif if (need_set && pos >= map_len) { /* Need to add queue to this CPU's map */ if (map_len >= alloc_len) { @@ -1001,6 +1009,8 @@ static ssize_t store_xps_map(struct netdev_queue *queue, if (dev_maps) call_rcu(&dev_maps->rcu, xps_dev_maps_release); + netdev_queue_numa_node_write(queue, (numa_node >= 0) ? numa_node : -1); + mutex_unlock(&xps_map_mutex); free_cpumask_var(mask); |