David Hoyle wrote:
>I am running v19.2.1 on a P3/500 and can achieve 0.34 second
>iteration time with Prime running alone. However, because
>of our dodgy electricity supply out here in the country, I
>have to run the m/c with an APC UPS which has Powerchute
>5.0.1 installed to achieve graceful shutdown if there is a
>protracted power failure. Even despite setting Prime95 to
>priority 9, a program in the UPS suite - ICONCLNT.EXE - takes
>78% to Prime's 17% of the cycles according to Wintop98. Before
>getting in touch with the manufacturer of the UPS system, who
>is not going to see his program as malfunctioning, I thought
>I would check if anyone else in the GIMPS programme has had a
>similar problem and found a way round it. The only things
>taking any signficant resources for the vast proportion of
>the time are Prime 95 and the UPS to ensure the power supply
>integrity is guaranteed. I hope this is not a Catch 22
>situation.
David,
Good news!! I ran across the same problem when I first
installed my UPS several years ago. I *did* call APC and
was told that ICONCLNT.EXE only manages the icon in the
system tray (that's the *ONLY* thing it does!!). It you
can live without it (ie: not having the power status of the
UPS always displaying in the system tray), you can get rid
of it. It will *not* affect the reliability of the UPS in
any way. The system tray icon is a visual indicator for the
user. The UPS makes noise when the status changes, so there
isn't any real need for it.
In Windows 98, go into System Information tool (located
under Programs | Accessories | System Tools. Select the
Tools menu and then System Configuration Utility. Click on
the Startup tab. Find ICONCLNT.EXE in the list, and remove
the check in the box. Click OK, exit the program, and
restart Windows. BAM!! No more system tray icon, Prime95
can get the CPU's time, and the UPS is running fine!!
Eric Hahn
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