cpupower/man/cpupower-monitor.1

1 .TH CPUPOWER\-MONITOR "1" "22/02/2011" "" "cpupower Manual"
3 cpupower\-monitor \- Report processor frequency and idle statistics
7 .RB "\-l"
10 .RB [ -c ] [ "\-m <mon1>," [ "<mon2>,..." ] ]
11 .RB [ "\-i seconds" ]
14 .RB [ -c ][ "\-m <mon1>," [ "<mon2>,..." ] ]
18 \fBcpupower-monitor \fP reports processor topology, frequency and idle power
22 \fBcpupower-monitor \fP implements independent processor sleep state and
24 directly reading out hardware registers. Use \-l to get an overview which are
29 \-l
35 The name in quotation marks which can be passed to the \-m parameter.
46 [T] \-> Thread
48 [C] \-> Core
50 [P] \-> Processor Package (Socket)
52 [M] \-> Machine/Platform wide counter
57 \-m <mon1>,<mon2>,...
59 Only display specific monitors. Use the monitor string(s) provided by \-l option.
62 \-i seconds
67 \-c
72 This is to wake up the processors from deeper sleep states and let the
74 -account its cpuidle (C-state) information before reading the
80 Measure idle and frequency characteristics of an arbitrary command/workload.
89 The kernel updates these values every time an idle state is entered or
90 left. Therefore there can be some inaccuracy when cores are in an idle
92 that one core stayed in an idle state for the whole measure time and the idle
100 The fact that on all recent hardware the mperf timer stops ticking in any idle
104 May work poorly on Linux-2.6.20 through 2.6.29, as the \fBacpi-cpufreq \fP
110 Threads (hyperthreaded cores) may not be able to enter deeper core states if
112 Deepest package sleep states may in reality show up as machine/platform wide
113 sleep states and can only be entered if all cores are idle. Look up Intel
138 cpupower monitor -l" may show:
140 Monitor "Mperf" (3 states) \- Might overflow after 922000000 s
144 Monitor "Idle_Stats" (3 states) \- Might overflow after 4294967295 s
149 cpupower monitor \-m "Idle_Stats,Mperf" scp /tmp/test /nfs/tmp
151 Monitor the scp command, show both Mperf and Idle_Stats states counter
163 shell script. Hit CTRL\-c to terminate the command and get the measure output
171 https://www.intel.com/content/www/us/en/gaming/resources/turbo-boost.html
173 "Power Management - Technology Overview"
176 "Intel® 64 and IA-32 Architectures Software Developer's Manual