On 2/11/24 05:26, Linux-Fan wrote:
David Christensen writes:
On 2/11/24 00:11, Thomas Schmitt wrote:
[...]
Increase block size:
2024-02-11 01:18:51 dpchrist@laalaa ~
$ dd if=/dev/urandom of=/dev/null bs=1M count=1K
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 3.62874 s, 296 MB/s
Here (Intel Xeon W-2295)
| $ dd if=/dev/urandom of=/dev/null bs=1M count=1K
| 1024+0 records in
| 1024+0 records out
| 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 2.15018 s, 499 MB/s
Raspberry pi 5:
dd if=/dev/urandom of=/dev/null bs=1M count=1K
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 3.0122 s, 356 MB/s
Now lets do it right and use random..............
dd if=/dev/random of=/dev/null bs=1M count=1K
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 2.9859 s, 360 MB/s
Secure Random can be obtained from OpenSSL:
| $ time for i in `seq 1 100`; do openssl rand -out /dev/null $((1024 *
1024 * 1024)); done
|
| real 0m49.288s
| user 0m44.710s
| sys 0m4.579s
time for i in `seq 1 100`; do openssl rand -out /dev/null $((1024 * 1024
* 1024)); done
real 1m30.884s
user 1m24.528s
sys 0m6.116s
