Cryptix Encryptor CPU utilization

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Casey - 04 Mar 2004 01:55 GMT

Im using the latest version of Cryptix with JDK 1.3.1_01. When ever I
encrypt a message with a key the cpu utilization spikes about 10%. Ive
tested this on Windows 2000 as well as Solaris 8. Is this normal?

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Michael Amling - 04 Mar 2004 04:55 GMT

> Im using the latest version of Cryptix with JDK 1.3.1_01. When ever I
> encrypt a message with a key the cpu utilization spikes about 10%. Ive
> tested this on Windows 2000 as well as Solaris 8. Is this normal?

For symmetric encryption using AES, expect less than a microsecond of
CPU time per byte. For public key encryption, it's much higher.

--Mike Amling

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Casey - 04 Mar 2004 15:00 GMT

> > Im using the latest version of Cryptix with JDK 1.3.1_01. When ever I
> > encrypt a message with a key the cpu utilization spikes about 10%. Ive
[quoted text clipped - 4 lines]
>
> --Mike Amling

Is there any way to lower the CPU utilization? I would rather it take
a few hundred milliseconds more then to hog the CPU.

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Roedy Green - 05 Mar 2004 07:33 GMT

>Is there any way to lower the CPU utilization? I would rather it take
>a few hundred milliseconds more then to hog the CPU.

Just lower the priority of the thread. You will still get 100%
utilisation,but the encryption will get last kick at the cat.

--
Canadian Mind Products, Roedy Green.
Coaching, problem solving, economical contract programming.
See http://mindprod.com/jgloss/jgloss.html for The Java Glossary.

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Pat Farrell - 06 Mar 2004 05:23 GMT

>> For symmetric encryption using AES, expect less than a microsecond of
>> CPU time per byte. For public key encryption, it's much higher.
>
>Is there any way to lower the CPU utilization? I would rather it take
>a few hundred milliseconds more then to hog the CPU.

For symmetric, nice the thread.
For RSA, not a prayer, it is too expensive. The solution,
if you care, is to not use RSA.

Pat http://www.pfarrell.com/prc/

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Roedy Green - 05 Mar 2004 07:32 GMT

>Im using the latest version of Cryptix with JDK 1.3.1_01. When ever I
>encrypt a message with a key the cpu utilization spikes about 10%. Ive
>tested this on Windows 2000 as well as Solaris 8. Is this normal?

I would expect even higher 100% since encryption is a very cpu
intensive task. With big enough buffers it should hit 100%. This is
not terrible, it is not as though it is a high priority use of CPU
locking everything out.

--
Canadian Mind Products, Roedy Green.
Coaching, problem solving, economical contract programming.
See http://mindprod.com/jgloss/jgloss.html for The Java Glossary.

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Cryptix Encryptor CPU utilization

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