This reverts commit
5c41c31ebd64fda821fb733a5784a7a440a794f8.
Use the pktgen-dpdk to test the commit
5c41c31ebd64
("dpif-netdev: includes microsecond delta in meter bucket calculation"),
it does't work as expected. And it broken the meter function (e.g. set
rate 200Mbps, the rate watched was 400Mbps). To reproduce it:
$ ovs-vsctl add-br br-int -- set bridge br-int datapath_type=netdev
$ ovs-ofctl -O OpenFlow13 add-meter br-int \
"meter=100 kbps burst stats bands=type=drop rate=200000 burst_size=200000"
$ ovs-ofctl -O OpenFlow13 add-flow br-int \
"in_port=dpdk0 action=meter:100,output:dpdk1"
$ pktgen -l 1,3,5,7,9,11,13,15,17,19 -n 8 --socket-mem 4096 \
--file-prefix pg1 -w 0000:82:00.0 -w 0000:82:00.1 -- \
-T -P -m "[3/5/7/9/11/13/15].[0-1]" -f meter-test.pkt
meter-test.pkt:
| set 0 count 0
| set 0 size 1500
| set 0 rate 100
| set 0 burst 64
| set 0 sport 1234
| set 0 dport 5678
| set 0 prime 1
| set 0 type ipv4
| set 0 proto udp
| set 0 dst ip 1.1.1.2
| set 0 src ip 1.1.1.1/24
| set 0 dst mac ec:0d:9a:ab:54:0a
| set 0 src mac ec:0d:9a:bf:df:bb
| set 0 vlanid 0
| start 0
Note that the issue that patch
5c41c31ebd64 was intended to fix was
already fixed by commit:
42697ca7757b ("dpif-netdev: fix meter at high packet rate.")
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
struct dp_packet *packet;
long long int long_delta_t; /* msec */
uint32_t delta_t; /* msec */
- uint32_t delta_in_us; /* usec */
const size_t cnt = dp_packet_batch_size(packets_);
uint32_t bytes, volume;
int exceeded_band[NETDEV_MAX_BURST];
Assuming that all racing threads received packets at the same time
to avoid overflow. */
long_delta_t = 0;
- delta_in_us = 0;
- } else {
- delta_in_us = (now - meter->used) % 1000;
}
/* Make sure delta_t will not be too large, so that bucket will not
/* Update band's bucket. */
band->bucket += delta_t * band->up.rate;
- band->bucket += delta_in_us * band->up.rate / 1000;
if (band->bucket > band->up.burst_size) {
band->bucket = band->up.burst_size;
}