My WFP driver hits low performance on win7
in [Device Drivers]
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From: Fei Zhang on 12 Jul 2010 05:43 I revised the inspect sample driver, add the filter to capture all inbound packets, set action to FWP_ACTION_BLOCK if the injection state is neither FWPS_PACKET_INJECTED_BY_SELF nor FWPS_PACKET_PREVIOUSLY_INJECTED_BY_SELF, and reinject these packets from the InspectWorker thread. Then I use chariot to test the tcp performance with 1 rx pair and 1 tx pair. After my inspect driver is loaded, the rx+tx performance will be about only 450Mbps, and the cpu usage is about 70%. If my driver is unloaded, the rx+tx performance will be about 1.45Gbps, and the cpu usage is ranging from 10%-60%, the average is about only 35%. 2cores cpu: Intel(R) Pentium(R) 4 cpu 3.00GHz, 3.02GHz RAM 1G It seems that the cpu usage is too high after my driver is loaded. Has anybody got high performance with filtering all inbound packets? Thanks a lot in advance for any suggestions. Fei Zhang __________ Information from ESET NOD32 Antivirus, version of virus signature database 5270 (20100711) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com |