Performance Tuning for iSCSI

According these papers, A scalable and high performance software iSCSI implementation, and Performance characterization of iSCSI processing in a server platform, CRC computation do affect the iSCSI performace. And in my prime test with oprofile, after the CRC computation is disabled in RX, the performance gets a roughly 20% enhancement. Even thought my test may be not accurate, I get more confidence to stride down this way.

Reference:
1. Design and Implementation of the iSCSI Storage Protocol on HBA Initiator (iSCSI HBA Initiator 端儲存協定處理架構之設計與實作)