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+---
+title: "MRR"
+weight: 4
+---
+
+# MRR
+
+Maximum Receive Rate (MRR) tests are complementary to MLRsearch tests,
+as they provide a maximum "raw" throughput benchmark for development and
+testing community. MRR tests measure the packet forwarding rate under
+the maximum load offered by traffic generator over a set trial duration,
+regardless of packet loss.
+
+MRR tests are currently used for following test jobs:
+
+- Report performance comparison: 64B, IMIX for vhost, memif.
+- Daily performance trending: 64B, IMIX for vhost, memif.
+- Per-patch performance verification: 64B.
+- Initial iterations of MLRsearch and PLRsearch: 64B.
+
+Maximum offered load for specific L2 Ethernet frame size is set to
+either the maximum bi-directional link rate or tested NIC model
+capacity, as follows:
+
+- For 10GE NICs the maximum packet rate load is 2x14.88 Mpps for 64B, a
+  10GE bi-directional link rate.
+- For 25GE NICs the maximum packet rate load is 2x18.75 Mpps for 64B, a
+  25GE bi-directional link sub-rate limited by 25GE NIC used on TRex TG,
+  XXV710.
+- For 40GE NICs the maximum packet rate load is 2x18.75 Mpps for 64B, a
+  40GE bi-directional link sub-rate limited by 40GE NIC used on TRex
+  TG, XL710. Packet rate for other tested frame sizes is limited by
+  PCIeGen3 x8 bandwidth limitation of ~50Gbps.
+
+MRR test code implements multiple bursts of offered packet load and has
+two configurable burst parameters: individual trial duration and number
+of trials in a single burst. This enables more precise performance
+trending by providing more results data for analysis.
+
+Burst parameter settings vary between different tests using MRR:
+
+- MRR individual trial duration:
+
+  - Report performance comparison: 1 sec.
+  - Daily performance trending: 1 sec.
+  - Per-patch performance verification: 10 sec.
+  - Initial iteration for MLRsearch: 1 sec.
+  - Initial iteration for PLRsearch: 5.2 sec.
+
+- Number of MRR trials per burst:
+
+  - Report performance comparison: 10.
+  - Daily performance trending: 10.
+  - Per-patch performance verification: 5.
+  - Initial iteration for MLRsearch: 1.
+  - Initial iteration for PLRsearch: 1.