HP 3000 Manuals HP 3000 Manuals
CPU Detail Screen If you choose the C command for the CPU Detail screen, you can view metrics that are specific to CPU usage. In addition to the Program Banner Line and Global Bars, this screen will show CPU usage by the dispatcher, memory manager, system, and batch processes, as well as the time spent in various states such as paused, idle, or in a queue. The detailed data section of the display has four components: * Type of Utilization. * Queue Distribution. * Miscellaneous Performance Metrics. * Top CPU Consumer.Click here to view figure. Figure 5-15. CPU Detail Screen Type of Utilization This uppermost section of the detail area lists the percentage of total time used for different system resources and system purposes.
NOTE Excessive switching may indicate CPU saturation. While switching rates depend on machine size, you combine the rates for the two modes and use table 5-2 as a guideline for determining whether excessive switching is occurring. If it is, you should consider a Native Mode migration.
Table 5-2. Guidelines for Switches to CM or NM ------------------------------------------------------------------------------------------- | | | Machine Threshold Rate | | Model (switches/second) | | | ------------------------------------------------------------------------------------------- | | | S/920 approx 75 | | | | S/925 approx 120 | | | | S/922 approx 150 | | | | S/932 approx 225 | | | | S/935 approx 270 | | | | S/950 approx 300 | | | | S/955,917,927,937,947 approx 440 | | | | S/948,949 approx 500 | | | | S/960 approx 630 | | | | S/958 approx 650 | | | | S/957 approx 720 | | | | S/980-100,967 approx 1000 | | | | S/977 approx 1170 | | | | S/980-200 approx 1500 | | | | S/980-300 approx 1830 | | | ------------------------------------------------------------------------------------------- CSI243sIX560CSI32s Interval CM % This shows the percentage of time the CPU was in Compatibility Mode between switches. Interval Processhis shows the rate of process completions for Completions the current interval (number of processes completed per second). This provides information about the workload characteristics of the machine. A high rate of process completions, for instance, may indicate a CPU bottleneck due to excessive or improper process handling. A sustained rate greater than 0.50 may be considered excessive. Current This shows the number of processes waiting for Ready Queue the CPU. [Scale: 0 to 25 processes.] Maximum This shows the maximum number of processes Ready Queue waiting for the CPU since GlancePlus was started or since the MPE/iX Measurement Interface was enabled. [Scale: 0 to 25 processes.] Launch Rate This shows the rate of launches during the current time interval (number of launches per second). A launch occurs every time the MPE/iX Dispatcher gives a process control of the CPU. CQ SAQ This is the System Average Quantum (SAQ) for the C queue (CQ). This value represents the current time limit (in milliseconds) during which a process in C queue can retain use of the CPU. The SAQ value, which is recalculated continuously by the dispatcher, must be a value between the minimum (MIN) and maximum (MAX) parameters of the current CQ setting. Interval This is the rate that files are being opened File Open Rate during the current interval (number of files opened per second). The File Open Rate can be used to judge the workload characteristics of the system. A sustained rate greater than 35 files opened per second might indicate a CPU bottleneck condition or, possibly, poor application design. Top CPU Consumer In a single line near the bottom of the CPU Detail screen, GlancePlus names the process that is consuming the most CPU resources.
NOTE If you do not have System Manager (SM) capability, you will see the letters "CI" instead of the command string text.