Hello, everyone!
I have a question about DPDK's QoS Library performance. These days, I am
tesing DPDK's QoS Library performance using the DPDK example, qos_sched.
Before I try to do the test, I modified profile.cfg. In my opinion, there
should be no packet dropped by qos_sched when it is processing packets at
about 3Gbps, 64bit. However, I find qos_sched would drop a few packets (about
30) at that case. Is it normal phenomenon? Or did I do anything wrong? I am so
amazed in the results. I need help. Thanks a lot!
my profile.cfg as following:
; Port configuration
[port]
frame overhead = 24
number of subports per port = 1
number of pipes per subport = 2
queue sizes = 64 64 64 64
; Subport configuration
[subport 0]
tb rate = 1250000000 ; Bytes per second
tb size = 1250000000 ; Bytes
tc 0 rate = 1250000000 ; Bytes per second
tc 1 rate = 1250000000 ; Bytes per second
tc 2 rate = 1250000000 ; Bytes per second
tc 3 rate = 1250000000 ; Bytes per second
tc period = 100000 ; Milliseconds
pipe 0-1 = 0 ; These pipes are configured with pipe profile 0
; Pipe configuration
[pipe profile 0]
tb rate = 1250000000 ; Bytes per second
tb size = 1250000000 ; Bytes
tc 0 rate = 1250000000 ; Bytes per second
tc 1 rate = 1250000000 ; Bytes per second
tc 2 rate = 1250000000 ; Bytes per second
tc 3 rate = 1250000000 ; Bytes per second
tc period = 400000 ; Milliseconds
tc 3 oversubscription weight = 1
tc 0 wrr weights = 1 1 1 1
tc 1 wrr weights = 1 1 1 1
tc 2 wrr weights = 1 1 1 1
tc 3 wrr weights = 1 1 1 1
; RED params per traffic class and color (Green / Yellow / Red)
[red]
tc 0 wred min = 48 40 32
tc 0 wred max = 64 64 64
tc 0 wred inv prob = 10 10 10
tc 0 wred weight = 9 9 9
tc 1 wred min = 48 40 32
tc 1 wred max = 64 64 64
tc 1 wred inv prob = 10 10 10
tc 1 wred weight = 9 9 9
tc 2 wred min = 48 40 32
tc 2 wred max = 64 64 64
tc 2 wred inv prob = 10 10 10
tc 2 wred weight = 9 9 9
tc 3 wred min = 48 40 32
tc 3 wred max = 64 64 64
tc 3 wred inv prob = 10 10 10
tc 3 wred weight = 9 9 9
Jim jia
