CPU Utilization on a NCR3450

• Microsoft Windows NT Workstation version 3.5
• Microsoft Windows NT Server version 3.5

SYMPTOMS

When you run Windows NT version 3.5 Server, Performance Monitor CPU Utilization counter on a four processors NCR3450 shows CPU # 3 at a higher utilization rate then CPUs #0, and #2. If the computer is idle, the CPU utilization for CPU #3 could be as high as 16 percent, compared to 4 to 6 percent on the rest of the CPU.

CAUSE

NCR HAL is not distributing the timer interrupts properly across the processors. Although the performance monitor shows more CPU utilization on CPU3, The performance of the system is not affected.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 3.5. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

The NCR product discussed here is manufactured by NCR Corporation, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.