11.10.10, 13:57, "Claudio Jeker" <[email protected]>:
> > After run "dd if=/dev/urandom of=/dev/null" > > first three "dd if=/dev/wd0c of=/dev/null bs=1m" reduce their part of CPU > and > > run "renice" not recover their part of CPU. > > CPU consumed by the kernel is not accounted by the scheduler. All the > work done by urandom is system time. It is strange... not well and not securely. In Linux (test 2.6.35): - run "dd if=/dev/urandom of=/dev/null" not change read speed from disk - renice 20 for first three "dd if=/dev/wd0c of=/dev/null bs=1m" and renice -5 for "dd if=/dev/urandom of=/dev/null" change throughput from 30Mb/s to 5Mb/s - renice -20 for "dd if=/dev/urandom of=/dev/null" slows the system, but not freeze -- Dmitry Telegin
