8 — Troubleshooting Solaris and Windows platforms
Alcatel-Lucent 5620 Service Aware Manager, Release 8-3
3HE 05723 TQZZA Edition 01 Troubleshooting Guide
4 Use the UNIX utility mpstat command to further review the activities performed
by the CPU.
i Type:
mpstat time ↵
where time is the interval, in seconds, that is monitored by the mpstat command
The time interval should be at least 10 s. An interval of more than 60 s may
have an effect on applications because of the amount of time the system
spends collecting mpstat data.
ii Review the mpstat output.
The following shows a sample mpstat output. See Table 8-1 for a description
of the report.
CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl
usr sys wt idl
0 1 0 5529 442 302 419 166 12 196 0 775
95 5 0 0
1 1 0 220 237 100 383 161 41 95 0 450 96
4 0 0
4 0 0 27 192 100 178 94 38 44 0 100 99
1 0 0
5 1 0 160 255 100 566 202 28 162 0 1286
87 8 0 5
Table 8-1 mpstat report description
Heading Description (events per second unless noted)
CPU Processor identification
minf Minor faults
mjf Major faults
xcal Interprocessor cross-calls
intr Interrupts
ithr Interrupts as threads (not counting clock interrupts)
csw Context switches
When the csw number slowly increases and the platform is not I/O bound,
a mutex contention is indicated
icsw Involuntary context switches
When the iscw number increases beyond 500, the system is considered to
be under heavy load
migr Thread migrations to another processor
smtx Spins on mutexes (lock not acquired on first try)
if the smtx number increases sharply, for instance from 30 to 300, a system
resource bottleneck is indicated
(1 of 2)
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