1MPSTAT(1)                     Linux User's Manual                    MPSTAT(1)
2
3
4

NAME

6       mpstat - Report processors related statistics.
7

SYNOPSIS

9       mpstat [ -A ] [ -n ] [ -u ] [ -V ] [ -I { keyword [,...] | ALL } ] [ -N
10       { node_list | ALL } ] [ -o JSON ] [ -P { cpu_list | ALL } ] [  interval
11       [ count ] ]
12

DESCRIPTION

14       The mpstat command writes to standard output activities for each avail‐
15       able processor, processor 0 being the first one.  Global average activ‐
16       ities  among  all processors are also reported.  The mpstat command can
17       be used both on SMP and UP machines, but in  the  latter,  only  global
18       average  activities  will be printed. If no activity has been selected,
19       then the default report is the CPU utilization report.
20
21       The interval parameter specifies the amount of time in seconds  between
22       each  report.   A  value  of 0 (or no parameters at all) indicates that
23       processors statistics are to be reported  for  the  time  since  system
24       startup  (boot).   The  count parameter can be specified in conjunction
25       with the interval parameter if this one is not set to zero.  The  value
26       of count determines the number of reports generated at interval seconds
27       apart. If the interval parameter is specified without the count parame‐
28       ter, the mpstat command generates reports continuously.
29
30

OPTIONS

32       -A     This  option  is equivalent to specifying -n -u -I ALL -N ALL -P
33              ALL
34
35       -I { keyword [,...] | ALL }
36              Report interrupts statistics.
37
38              Possible keywords are CPU, SCPU, and SUM.
39
40              With the CPU keyword, the number of  each  individual  interrupt
41              received  per second by the CPU or CPUs is displayed. Interrupts
42              are those listed in /proc/interrupts file.
43
44              With the SCPU keyword, the number of  each  individual  software
45              interrupt  received  per second by the CPU or CPUs is displayed.
46              This option works only with kernels 2.6.31 and  later.  Software
47              interrupts are those listed in /proc/softirqs file.
48
49              With  the SUM keyword, the mpstat command reports the total num‐
50              ber of interrupts per processor.  The following values are  dis‐
51              played:
52
53              CPU
54                     Processor  number. The keyword all indicates that statis‐
55                     tics are calculated as averages among all processors.
56
57              intr/s
58                     Show the total number of interrupts received  per  second
59                     by the CPU or CPUs.
60
61              The  ALL  keyword  is  equivalent to specifying all the keywords
62              above and therefore all the interrupts statistics are displayed.
63
64       -N { node_list | ALL }
65              Indicate the NUMA nodes for which statistics are to be reported.
66              node_list is a list of comma-separated values or range of values
67              (e.g., 0,2,4-7,12-).  Note that node all is the  global  average
68              among  all  nodes. The ALL keyword indicates that statistics are
69              to be reported for all nodes.
70
71       -n     Report summary CPU statistics based on NUMA node placement.  The
72              following values are displayed:
73
74              NODE
75                     Node  number.  The  keyword all indicates that statistics
76                     are calculated as averages among all nodes.
77
78              All the other fields are the same as those displayed with option
79              -u (see below).
80
81       -o JSON
82              Display the statistics in JSON (Javascript Object Notation) for‐
83              mat.  JSON output field order is undefined, and new  fields  may
84              be added in the future.
85
86       -P { cpu_list | ALL }
87              Indicate the processors for which statistics are to be reported.
88              cpu_list is a list of comma-separated values or range of  values
89              (e.g., 0,2,4-7,12-).  Note that processor 0 is the first proces‐
90              sor, and processor all is the global average among  all  proces‐
91              sors.   The  ALL  keyword  indicates  that  statistics are to be
92              reported for all processors.  Offline processors  are  not  dis‐
93              played.
94
95       -u     Report CPU utilization. The following values are displayed:
96
97              CPU
98                     Processor  number. The keyword all indicates that statis‐
99                     tics are calculated as averages among all processors.
100
101              %usr
102                     Show the percentage  of  CPU  utilization  that  occurred
103                     while executing at the user level (application).
104
105              %nice
106                     Show  the  percentage  of  CPU  utilization that occurred
107                     while executing at the user level with nice priority.
108
109              %sys
110                     Show the percentage  of  CPU  utilization  that  occurred
111                     while  executing  at the system level (kernel). Note that
112                     this does not include time spent servicing  hardware  and
113                     software interrupts.
114
115              %iowait
116                     Show  the  percentage  of  time that the CPU or CPUs were
117                     idle during which the system had an outstanding disk  I/O
118                     request.
119
120              %irq
121                     Show  the  percentage of time spent by the CPU or CPUs to
122                     service hardware interrupts.
123
124              %soft
125                     Show the percentage of time spent by the CPU or  CPUs  to
126                     service software interrupts.
127
128              %steal
129                     Show  the percentage of time spent in involuntary wait by
130                     the virtual CPU or CPUs while the hypervisor was  servic‐
131                     ing another virtual processor.
132
133              %guest
134                     Show  the  percentage of time spent by the CPU or CPUs to
135                     run a virtual processor.
136
137              %gnice
138                     Show the percentage of time spent by the CPU or  CPUs  to
139                     run a niced guest.
140
141              %idle
142                     Show  the  percentage  of  time that the CPU or CPUs were
143                     idle and the system did not have an outstanding disk  I/O
144                     request.
145
146       -V     Print version number then exit.
147
148

ENVIRONMENT

150       The  mpstat  command takes into account the following environment vari‐
151       able:
152
153
154       S_COLORS
155              When this variable is set, display statistics in  color  on  the
156              terminal.   Possible  values for this variable are never, always
157              or auto (the latter is the default).
158
159              Please note that the color (being red,  yellow,  or  some  other
160              color)  used to display a value is not indicative of any kind of
161              issue simply because of the color. It only  indicates  different
162              ranges of values.
163
164
165       S_COLORS_SGR
166              Specify  the colors and other attributes used to display statis‐
167              tics on the terminal.  Its value is a  colon-separated  list  of
168              capabilities             that             defaults            to
169              H=31;1:I=32;22:M=35;1:N=34;1:Z=34;22.   Supported   capabilities
170              are:
171
172
173              H=     SGR  (Select  Graphic Rendition) substring for percentage
174                     values greater than or equal to 75%.
175
176
177              I=     SGR substring for CPU number.
178
179
180              M=     SGR substring for percentage values in the range from 50%
181                     to 75%.
182
183
184              N=     SGR substring for non-zero statistics values.
185
186
187              Z=     SGR substring for zero values.
188
189
190       S_TIME_FORMAT
191              If  this  variable  exists and its value is ISO then the current
192              locale will be ignored when printing  the  date  in  the  report
193              header.   The mpstat command will use the ISO 8601 format (YYYY-
194              MM-DD) instead.  The timestamp will also be compliant  with  ISO
195              8601 format.
196
197

EXAMPLES

199       mpstat 2 5
200              Display  five  reports of global statistics among all processors
201              at two second intervals.
202
203       mpstat -P ALL 2 5
204              Display five reports of statistics for  all  processors  at  two
205              second intervals.
206
207

BUGS

209       /proc filesystem must be mounted for the mpstat command to work.
210
211

FILES

213       /proc contains various files with system statistics.
214
215

AUTHOR

217       Sebastien Godard (sysstat <at> orange.fr)
218

SEE ALSO

220       sar(1), pidstat(1), iostat(1), vmstat(8)
221
222       http://pagesperso-orange.fr/sebastien.godard/
223
224
225
226Linux                             MARCH 2018                         MPSTAT(1)
Impressum