HP-UX 11i Tuning and Performance

7.8. CPU Use and Performance Tools

Many tools provide useful data for dealing with CPU bottlenecks. Table 7-1 provides a summary.

Table 7-1. Tools That Provide Data on CPU Use

	glance/gpm	MeasureWare	sar	top	vmstat	iostat
user	X	X	X	X	X	X
nice	X	X		X		X
nasty	X
real-time	X	X
system	X	X	X	X	X	X
interrupt	X	X		X
context switch	X	X		SSYS
vfault	X
trap	X				X
wait I/O			X
idle
run Queue	[*]	[*]	X	X	X	X
Load Average	X	X		X

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Not all of these tools always provide accurate values for the various CPU data. In particular, sar, top, vmstat, and iostat don't always accurately account for interrupt time. In fact, they may count interrupt time as user time, idle time, or system time, depending on when the interrupt arrived. ...