On Mon, Aug 4, 2014 at 7:52 PM, Joel Rees <joel.r...@gmail.com> wrote: > On Sat, Aug 2, 2014 at 11:01 AM, Joel Rees <joel.r...@gmail.com> wrote: >> [...] >> >> Now, the random typing is not necessary. > > Well, it's not as rosy as I thought, for /dev/random: > > ------------------------ > duty@deb:~/math_work/sf/rollcalld$ time dd bs=128 count=16 > if=/dev/random iflag=fullblock of=randump2 > 16+0 レコード入力 > 16+0 レコード出力 > 2048 バイト (2.0 kB) コピーされました、 107.939 秒、 0.0 kB/秒 > > real 1m47.945s > user 0m0.004s > sys 0m0.012s > duty@deb:~/math_work/sf/rollcalld$ time dd bs=128 count=16 > if=/dev/urandom iflag=fullblock of=urandump2 > 16+0 レコード入力 > 16+0 レコード出力 > 2048 バイト (2.0 kB) コピーされました、 0.000850541 秒、 2.4 MB/秒 > > real 0m0.048s > user 0m0.004s > sys 0m0.004s > ------------------------ > > I want to take a 2 MB dump from both and run some statistical stuff on > them. Which means I'm going to have to start the one for urandom in > the morning one day when I'm going to be doing something else with a > lot of typing and other entropy improving stuff and see how long it > takes to dump 16 kilobytes, and then try 64 kilobytes, and so forth > until I have an idea how long it will take.
-------------------------- duty@deb:~/math_work/sf/rollcalld$ time dd bs=128 count=128 if=/dev/urandom iflag=fullblock of=urandump2 128+0 レコード入力 128+0 レコード出力 16384 バイト (16 kB) コピーされました、 0.00482425 秒、 3.4 MB/秒 real 0m0.011s user 0m0.000s sys 0m0.004s duty@deb:~/math_work/sf/rollcalld$ time dd bs=128 count=128 if=/dev/random iflag=fullblock of=randump2 128+0 レコード入力 128+0 レコード出力 16384 バイト (16 kB) コピーされました、 946.389 秒、 0.0 kB/秒 real 15m46.570s user 0m0.008s sys 0m0.120s -------------------------- Reading e-mail and posting to one of my blogs while I dumped /dev/random . 16 minutes for 16K, looks like 64K will be an hour and a half or so. 16K is enough for some initial analysis. Need to allocate some time for it. -- Joel Rees Be careful where you see conspiracy. Look first in your own heart. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/CAAr43iNNJfKuumG5FG1ZNpFQA5=jpkj+svorrywtg3tpvod...@mail.gmail.com
