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| author |   Mark D. Gray <mark.d.gray@intel.com> | 2016-07-12 08:59:24 +0000 |
|---|---|---|
| committer |   Gerrit Code Review <gerrit@172.30.200.206> | 2016-07-12 08:59:24 +0000 |
| commit | 72b1f3a5d6f98ce398a2f15c7db1a6bb7f3e184e (patch) | |
| tree | 4843de1699362bf031f72269aa18090ead52e53a | |
| parent | 329305235137adb72f9e8736f78f21fff3ec2ed6 (diff) | |
| parent | 7f666d1ac67abdafd91ae1b3dc31010f6c28c62f (diff) | |
Merge "specs: Add "Testing" section to High Priority Datapath spec"
| -rw-r--r-- | specs/High-Priority-Traffic-Path.rst | 66 |
1 files changed, 65 insertions, 1 deletions
diff --git a/specs/High-Priority-Traffic-Path.rst b/specs/High-Priority-Traffic-Path.rst index 25f6361..6243cbe 100644 --- a/specs/High-Priority-Traffic-Path.rst +++ b/specs/High-Priority-Traffic-Path.rst @@ -151,7 +151,71 @@ TBD Testing ======= -TBD +In order to test how effectively the virtual switch handles high priority traffic +types, the following scheme is suggested.:: + + +---------------------------+ Ingress Traffic Parameters + | | +-------------------------------------------+ + | | + | | Packet Size: The size of the Ethernet frames + | | + | | Tmax: RFC2544 Max. Throughput for traffic of + | PHY0 <-------+ "Packet Size" + | | + | | Total Offered Rate: The offered rate of both + | | traffic classes combined expressed as a % of + | | Tmax + | | + | | Ingress Rates are expressed as a percentage + | | of Total Offered Rate. + | | + | | Class A: + | OVS | Ethernet PCP = 0 (Background) + | (BR0) | Ingress Rate : rate_ingress_a(n) Mfps + | | + | | Class B: + | | Ethernet PCP = 7 (Highest) + | | Ingress Rate : rate_ingress_b(n) Mfps + | | + | | Egress Traffic Measurements + | | +-------------------------------------------+ + | | Class A: + | | Egress Throughput : rate_egress_a(n) Mfps + | | Egress Latency : max_lat_egrees_a(n) ms + | | Egress Jitter : max_jit_egress_a(n) ms + | PHY1 +-------> + | | Class B: + | | Egress Throughput : rate_egress_b(n) Mfps + | | Egress Latency : max_lat_egrees_b(n) ms + +---------------------------+ Egress Jitter : max_jit_egress_b(n) ms + + +Open vSwitch is configured to forward traffic between two ports agnostic to the +traffic type. For example, using the following command: + +ovs-ofctl add-flow br0 in_port=0,actions=output:1 + +The test will be carried out with the functionality to enable high-priority +traffic enabled and disabled in order to guage the change in performance for +both cases. + +Two classes of traffic will be generated by a traffic generator. In the example +above, the classes are differentiated using the Ethernet PCP field. However, +another means for differentiating traffic could be used, depending the +prioritization scheme that is developed. + +Tests should be performed for each combination of: + +* Packet Sizes in (64, 512) +* Total Offered Rate in (80, 120, 150) +* rate_ingress_b(n) / rate_ingress_a(n) in (0.1, 0.2, 0.5) + +For each set, the following metrics should be collected for each traffic +class over a specified time period: + +Egress Throughput (Mfps) +Maximum Egress Latency (ms) +Maximum Egress Jitter (ms) Documentation Impact ==================== |