"Richard B. Johnson" <[email protected]>
Quoted 6 lines
A 400 MHz ix86 CPU will checksum/copy at 685 megabytes per second. It will copy at 1,549 megabytes per second. Those are megaBYTES!
Interesting. You copy data with 1,549 megabytes per second over a 800 megabytes per second frond side bus, into (probably) PC100 memory, i.e. theoretical bandwidth of 800 megabytes/sec. You probably operate within the L2 cache.
Roy, which type of memory and which chipset do you use?
The csum/copy speed is 210 MByte/sec: 13% cpu time needed for 225 mbit/sec. That could be correct, if you use SDRAM and everything is cache-cold (source dma from disk, dest previously used as a network buffer, dma from nic)
--
Manfred