> Did you have a chance to diagnose the performance > problem? I kinda > suspect Atom's clock is maxed out there. Unless your > old board also use Atom?
I figured out that the block size seems to significantly effect performance. DD with a block size of 16384 gives me 251 MB/s, and DD with a block size of 65536 gives me 413 MB/s. I suspect that a lot of this speed is write caching, but either way I no longer have this complaint. so...@sbox:/tank/soren/test$ dd if=/dev/zero of=tmp.bin bs=1024 count=1048576 1048576+0 records in 1048576+0 records out 1073741824 bytes (1.1 GB) copied, 39.8916 s, 26.9 MB/s so...@sbox:/tank/soren/test$ dd if=/dev/zero of=tmp.bin bs=16384 count=65536 65536+0 records in 65536+0 records out 1073741824 bytes (1.1 GB) copied, 4.27883 s, 251 MB/s so...@sbox:/tank/soren/test$ dd if=/dev/zero of=tmp.bin bs=65536 count=16384 16384+0 records in 16384+0 records out 1073741824 bytes (1.1 GB) copied, 2.60139 s, 413 MB/s -- This message posted from opensolaris.org _______________________________________________ indiana-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/indiana-discuss
