We report iSCSI performance measurements on Myrinet 10G-PCIE-8A-C NICs with UNH iSCSI software and the Myri10GE driver version Beta 0.9.0pre1 using 9000 Byte (jumbo) frames and TSO enabled.

All tests were between pairs of single-core dual-processor 2.6GHz Opterons with the Tyan S2895 motherboard connected to a 10-Gigabit Ethernet switch.

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Linux

The TCP/IP stack was tuned and the UNH iSCSI Target and Initiator were configured according to the instructions on the UNH iSCSI Myri10GE Installation web page.

The latest Linux 2.6.15 kernels from kernel.org were used (2.6.15.6 or 2.6.15.7). For testing with software header digests and data digests, Cryptographic API under Cryptographic options and CRC32c CRC algorithm in the kernel were enabled. They are the kernel options CONFIG_CRYPTO and CONFIG_CRYPTO_CRC32C respectively.

The UNH Target was configured with MEMORYIO.

Bandwidth was measured with Iometer. An additional Windows host with Myri10GE was connected to the switch as well and running the GUI interface, steering the dynamos on the iSCSI hosts.

No data or header digest: