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openvswitch: Per cpu flow stats.

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With mega flow implementation ovs flow can be shared between
multiple CPUs which makes stats updates highly contended
operation. This patch uses per-CPU stats in cases where a flow
is likely to be shared (if there is a wildcard in the 5-tuple
and therefore likely to be spread by RSS). In other situations,
it uses the current strategy, saving memory and allocation time.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Pravin B Shelar
2013-10-29 17:22:21 -07:00
committed by Jesse Gross
parent 795449d8b8
commit e298e50570
7 changed files with 210 additions and 55 deletions
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56
net/openvswitch/flow_netlink.c
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@@ -266,6 +266,20 @@ static bool is_all_zero(const u8 *fp, size_t size)
return true;
}
static bool is_all_set(const u8 *fp, size_t size)
{
int i;
if (!fp)
return false;
for (i = 0; i < size; i++)
if (fp[i] != 0xff)
return false;
return true;
}
static int __parse_flow_nlattrs(const struct nlattr *attr,
const struct nlattr *a[],
u64 *attrsp, bool nz)
@@ -487,8 +501,9 @@ static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs,
return 0;
}
static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
const struct nlattr **a, bool is_mask)
static int ovs_key_from_nlattrs(struct sw_flow_match *match, bool *exact_5tuple,
u64 attrs, const struct nlattr **a,
bool is_mask)
{
int err;
u64 orig_attrs = attrs;
@@ -545,6 +560,11 @@ static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
}
if (is_mask && exact_5tuple) {
if (match->mask->key.eth.type != htons(0xffff))
*exact_5tuple = false;
}
if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
const struct ovs_key_ipv4 *ipv4_key;
@@ -567,6 +587,13 @@ static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
ipv4_key->ipv4_dst, is_mask);
attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
if (is_mask && exact_5tuple && *exact_5tuple) {
if (ipv4_key->ipv4_proto != 0xff ||
ipv4_key->ipv4_src != htonl(0xffffffff) ||
ipv4_key->ipv4_dst != htonl(0xffffffff))
*exact_5tuple = false;
}
}
if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
@@ -598,6 +625,13 @@ static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
is_mask);
attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
if (is_mask && exact_5tuple && *exact_5tuple) {
if (ipv6_key->ipv6_proto != 0xff ||
!is_all_set((u8 *)ipv6_key->ipv6_src, sizeof(match->key->ipv6.addr.src)) ||
!is_all_set((u8 *)ipv6_key->ipv6_dst, sizeof(match->key->ipv6.addr.dst)))
*exact_5tuple = false;
}
}
if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
@@ -640,6 +674,11 @@ static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
tcp_key->tcp_dst, is_mask);
}
attrs &= ~(1 << OVS_KEY_ATTR_TCP);
if (is_mask && exact_5tuple && *exact_5tuple &&
(tcp_key->tcp_src != htons(0xffff) ||
tcp_key->tcp_dst != htons(0xffff)))
*exact_5tuple = false;
}
if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
@@ -671,6 +710,11 @@ static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
udp_key->udp_dst, is_mask);
}
attrs &= ~(1 << OVS_KEY_ATTR_UDP);
if (is_mask && exact_5tuple && *exact_5tuple &&
(udp_key->udp_src != htons(0xffff) ||
udp_key->udp_dst != htons(0xffff)))
*exact_5tuple = false;
}
if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
@@ -756,6 +800,7 @@ static void sw_flow_mask_set(struct sw_flow_mask *mask,
* attribute specifies the mask field of the wildcarded flow.
*/
int ovs_nla_get_match(struct sw_flow_match *match,
bool *exact_5tuple,
const struct nlattr *key,
const struct nlattr *mask)
{
@@ -803,10 +848,13 @@ int ovs_nla_get_match(struct sw_flow_match *match,
}
}
err = ovs_key_from_nlattrs(match, key_attrs, a, false);
err = ovs_key_from_nlattrs(match, NULL, key_attrs, a, false);
if (err)
return err;
if (exact_5tuple)
*exact_5tuple = true;
if (mask) {
err = parse_flow_mask_nlattrs(mask, a, &mask_attrs);
if (err)
@@ -844,7 +892,7 @@ int ovs_nla_get_match(struct sw_flow_match *match,
}
}
err = ovs_key_from_nlattrs(match, mask_attrs, a, true);
err = ovs_key_from_nlattrs(match, exact_5tuple, mask_attrs, a, true);
if (err)
return err;
} else {