On Wed, Oct 05, 2005 at 11:24:07AM -0400, Luke Lonergan wrote:
Nope - it would be disk wait.


I said I/O overhead; i.e., it could be the overhead of calling the
kernel for I/O's. E.g., the following process is having I/O problems:

time dd if=/dev/sdc of=/dev/null bs=1 count=10000000 10000000+0 records in 10000000+0 records out 10000000 bytes transferred in 8.887845 seconds (1125132 bytes/sec) real 0m8.889s user 0m0.877s sys 0m8.010s
it's not in disk wait state (in fact the whole read was cached) but it's
only getting 1MB/s.
Mike Stone

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