CPU statistics calculation algorithm
I too many search on internet to found algorithm calculated %Us , %Sy , %Id , ... on result of top command . but can not found any documentation .
some documents like this or this calculate cpu utilization but output not equal with output of top command . (too diff !!!)
How do the top or mpstat commands calculate cpu statistics ?
linux shell-script c system-programming
edited Feb 13 at 11:36
X Tian
7,71712136
asked Feb 11 at 12:00
mah454mah454
1242
add a comment |
I too many search on internet to found algorithm calculated %Us , %Sy , %Id , ... on result of top command . but can not found any documentation .
some documents like this or this calculate cpu utilization but output not equal with output of top command . (too diff !!!)
How do the top or mpstat commands calculate cpu statistics ?
linux shell-script c system-programming
edited Feb 13 at 11:36
X Tian
7,71712136
asked Feb 11 at 12:00
mah454mah454
1242
add a comment |
I too many search on internet to found algorithm calculated %Us , %Sy , %Id , ... on result of top command . but can not found any documentation .
some documents like this or this calculate cpu utilization but output not equal with output of top command . (too diff !!!)
How do the top or mpstat commands calculate cpu statistics ?
linux shell-script c system-programming
edited Feb 13 at 11:36
X Tian
7,71712136
asked Feb 11 at 12:00
mah454mah454
1242
I too many search on internet to found algorithm calculated %Us , %Sy , %Id , ... on result of top command . but can not found any documentation .
some documents like this or this calculate cpu utilization but output not equal with output of top command . (too diff !!!)
How do the top or mpstat commands calculate cpu statistics ?
linux shell-script c system-programming
linux shell-script c system-programming
edited Feb 13 at 11:36
X Tian
7,71712136
asked Feb 11 at 12:00
mah454mah454
1242
edited Feb 13 at 11:36
X Tian
7,71712136
asked Feb 11 at 12:00
mah454mah454
1242
edited Feb 13 at 11:36
X Tian
7,71712136
edited Feb 13 at 11:36
X Tian
7,71712136
edited Feb 13 at 11:36
X Tian
7,71712136
7,71712136
asked Feb 11 at 12:00
mah454mah454
1242
asked Feb 11 at 12:00
mah454mah454
1242
asked Feb 11 at 12:00
mah454mah454
1242
1242
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
I calculate with this formula :
result=(CurrentUse-PrevUse)*100/(CurrentTotal-PrevTotal)
this is a example script calculate [us,sys,idle] of cpu .
#!/bin/bash
prev_total=0
prev_idle=0
prev_us=0
prev_sys=0
while true
do
line=$(head -n1 /proc/stat)
us=$(echo $line | awk '{print $2}')
ni=$(echo $line | awk '{print $3}')
sy=$(echo $line | awk '{print $4}')
id=$(echo $line | awk '{print $5}')
io=$(echo $line | awk '{print $6}')
irq=$(echo $line | awk '{print $7}')
si=$(echo $line | awk '{print $8}')
st=$(echo $line | awk '{print $9}')
g=$(echo $line | awk '{print $10}')
gn=$(echo $line | awk '{print $11}')
total=$(expr $us + $ni + $sy + $id + $io + $irq + $si + $st + $g + $gn)
let "diff_total=$total-$prev_total"
let "diff_idle=$id-$prev_idle"
let "diff_us=$us-$prev_us"
let "diff_sys=$sy-$prev_sys"
let "result_us=$diff_us * 100 / $diff_total"
let "result_idle=$diff_idle * 100 / $diff_total"
let "result_sys=$diff_sys * 100 / $diff_total"
echo -en "rCpu us:$result_us% sys:$result_sys% idle:$result_idle%bb"
prev_total=$total
prev_idle=$id
prev_us=$us
prev_sys=$sy
sleep 1
done
output like this :
Cpu us:1% sys:0% idle:97%
answered Feb 12 at 17:56
mah454mah454
1242
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I calculate with this formula :
result=(CurrentUse-PrevUse)*100/(CurrentTotal-PrevTotal)
this is a example script calculate [us,sys,idle] of cpu .
#!/bin/bash
prev_total=0
prev_idle=0
prev_us=0
prev_sys=0
while true
do
line=$(head -n1 /proc/stat)
us=$(echo $line | awk '{print $2}')
ni=$(echo $line | awk '{print $3}')
sy=$(echo $line | awk '{print $4}')
id=$(echo $line | awk '{print $5}')
io=$(echo $line | awk '{print $6}')
irq=$(echo $line | awk '{print $7}')
si=$(echo $line | awk '{print $8}')
st=$(echo $line | awk '{print $9}')
g=$(echo $line | awk '{print $10}')
gn=$(echo $line | awk '{print $11}')
total=$(expr $us + $ni + $sy + $id + $io + $irq + $si + $st + $g + $gn)
let "diff_total=$total-$prev_total"
let "diff_idle=$id-$prev_idle"
let "diff_us=$us-$prev_us"
let "diff_sys=$sy-$prev_sys"
let "result_us=$diff_us * 100 / $diff_total"
let "result_idle=$diff_idle * 100 / $diff_total"
let "result_sys=$diff_sys * 100 / $diff_total"
echo -en "rCpu us:$result_us% sys:$result_sys% idle:$result_idle%bb"
prev_total=$total
prev_idle=$id
prev_us=$us
prev_sys=$sy
sleep 1
done
output like this :
Cpu us:1% sys:0% idle:97%
answered Feb 12 at 17:56
mah454mah454
1242
add a comment |
I calculate with this formula :
result=(CurrentUse-PrevUse)*100/(CurrentTotal-PrevTotal)
this is a example script calculate [us,sys,idle] of cpu .
#!/bin/bash
prev_total=0
prev_idle=0
prev_us=0
prev_sys=0
while true
do
line=$(head -n1 /proc/stat)
us=$(echo $line | awk '{print $2}')
ni=$(echo $line | awk '{print $3}')
sy=$(echo $line | awk '{print $4}')
id=$(echo $line | awk '{print $5}')
io=$(echo $line | awk '{print $6}')
irq=$(echo $line | awk '{print $7}')
si=$(echo $line | awk '{print $8}')
st=$(echo $line | awk '{print $9}')
g=$(echo $line | awk '{print $10}')
gn=$(echo $line | awk '{print $11}')
total=$(expr $us + $ni + $sy + $id + $io + $irq + $si + $st + $g + $gn)
let "diff_total=$total-$prev_total"
let "diff_idle=$id-$prev_idle"
let "diff_us=$us-$prev_us"
let "diff_sys=$sy-$prev_sys"
let "result_us=$diff_us * 100 / $diff_total"
let "result_idle=$diff_idle * 100 / $diff_total"
let "result_sys=$diff_sys * 100 / $diff_total"
echo -en "rCpu us:$result_us% sys:$result_sys% idle:$result_idle%bb"
prev_total=$total
prev_idle=$id
prev_us=$us
prev_sys=$sy
sleep 1
done
output like this :
Cpu us:1% sys:0% idle:97%
answered Feb 12 at 17:56
mah454mah454
1242
add a comment |
I calculate with this formula :
result=(CurrentUse-PrevUse)*100/(CurrentTotal-PrevTotal)
this is a example script calculate [us,sys,idle] of cpu .
#!/bin/bash
prev_total=0
prev_idle=0
prev_us=0
prev_sys=0
while true
do
line=$(head -n1 /proc/stat)
us=$(echo $line | awk '{print $2}')
ni=$(echo $line | awk '{print $3}')
sy=$(echo $line | awk '{print $4}')
id=$(echo $line | awk '{print $5}')
io=$(echo $line | awk '{print $6}')
irq=$(echo $line | awk '{print $7}')
si=$(echo $line | awk '{print $8}')
st=$(echo $line | awk '{print $9}')
g=$(echo $line | awk '{print $10}')
gn=$(echo $line | awk '{print $11}')
total=$(expr $us + $ni + $sy + $id + $io + $irq + $si + $st + $g + $gn)
let "diff_total=$total-$prev_total"
let "diff_idle=$id-$prev_idle"
let "diff_us=$us-$prev_us"
let "diff_sys=$sy-$prev_sys"
let "result_us=$diff_us * 100 / $diff_total"
let "result_idle=$diff_idle * 100 / $diff_total"
let "result_sys=$diff_sys * 100 / $diff_total"
echo -en "rCpu us:$result_us% sys:$result_sys% idle:$result_idle%bb"
prev_total=$total
prev_idle=$id
prev_us=$us
prev_sys=$sy
sleep 1
done
output like this :
Cpu us:1% sys:0% idle:97%
answered Feb 12 at 17:56
mah454mah454
1242
I calculate with this formula :
result=(CurrentUse-PrevUse)*100/(CurrentTotal-PrevTotal)
this is a example script calculate [us,sys,idle] of cpu .
#!/bin/bash
prev_total=0
prev_idle=0
prev_us=0
prev_sys=0
while true
do
line=$(head -n1 /proc/stat)
us=$(echo $line | awk '{print $2}')
ni=$(echo $line | awk '{print $3}')
sy=$(echo $line | awk '{print $4}')
id=$(echo $line | awk '{print $5}')
io=$(echo $line | awk '{print $6}')
irq=$(echo $line | awk '{print $7}')
si=$(echo $line | awk '{print $8}')
st=$(echo $line | awk '{print $9}')
g=$(echo $line | awk '{print $10}')
gn=$(echo $line | awk '{print $11}')
total=$(expr $us + $ni + $sy + $id + $io + $irq + $si + $st + $g + $gn)
let "diff_total=$total-$prev_total"
let "diff_idle=$id-$prev_idle"
let "diff_us=$us-$prev_us"
let "diff_sys=$sy-$prev_sys"
let "result_us=$diff_us * 100 / $diff_total"
let "result_idle=$diff_idle * 100 / $diff_total"
let "result_sys=$diff_sys * 100 / $diff_total"
echo -en "rCpu us:$result_us% sys:$result_sys% idle:$result_idle%bb"
prev_total=$total
prev_idle=$id
prev_us=$us
prev_sys=$sy
sleep 1
done
output like this :
Cpu us:1% sys:0% idle:97%
answered Feb 12 at 17:56
mah454mah454
1242
answered Feb 12 at 17:56
mah454mah454
1242
answered Feb 12 at 17:56
mah454mah454
1242
answered Feb 12 at 17:56
mah454mah454
1242
1242
add a comment |
add a comment |
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