It seems Buckie wrote:It doesn't matter as far as cdevsw entry for zero-device write leads to null_write() in /usr/src/sys/dev/null.c
I ran a dd: dd if=/dev/ad1 of=/dev/zero ibs=8192
OH, you need to output to /dev/null NOT /dev/zero :)
I was testing the memory to memory copy through a driver using /dev/null and /dev/zero and with
dd if=/dev/zero of=/dev/null
I get till 4.2Gb/s. Is it a maximum for memory throughout + cpu work ? (2.4GHz Laptop with SDRAM)
Varying the bs parameter from 512 to 65536, I get a linear progression until bs=65536 (previous throughout) but the relative throughout is lower for bs=1024. Someone could explain?
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