Which version of Time::HiRes are you using?

There was a bug in versions < ~1.53 that meant it only used a low-resolution timer. This what later enhanced with the use of a short period, high resolution timer.

However, there were still some circumstances, particularly under the aucpices of the debugger, in which the resolution seemed to fall off quite badly. See In search of a bug in Time::HiRes on Windows..

You mentioned Vista somewhere in one of your replies. Are all the systems running Vista? Maybe there is some incompatibility.

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In reply to Re: Time::HiRes sleep does not always work by BrowserUk
in thread Time::HiRes sleep does not always work by tone

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