System Monitor and top reporting wildly different cpu usage for process
When I monitor a process using top command it returns the CPU usage for the process like 99.5%. But when I monitor a same process using system monitor (Process tab) for the particular it shows 25%.
- What is the cause of this discrepancy?
- Which value is correct?
top
command or system monitor
screenshot of discrepancy between top and Systems Monitor
Please help me on this.
cpu cpu-load system-monitor
New contributor
add a comment |
When I monitor a process using top command it returns the CPU usage for the process like 99.5%. But when I monitor a same process using system monitor (Process tab) for the particular it shows 25%.
- What is the cause of this discrepancy?
- Which value is correct?
top
command or system monitor
screenshot of discrepancy between top and Systems Monitor
Please help me on this.
cpu cpu-load system-monitor
New contributor
Top reports usage pr (virtual) cpu-core, so 2 cores with hyper-threadings gives 4 cpu's = 100%. System monitor reports 100% for the whole system.
– Soren A
2 days ago
@SorenA Thanks a lot..Basically top command returns the total cpu usage of all cores while System monitor reports average of that isn't it? Am I correct?
– Gowthamy.95
2 days ago
more or less ... what I tried to say was that in top each virtual cpu counts as 100%, so if you have 2 cores with hyper threading it will count as 400%. System monitor counts the whole system as 100%, so one virtuel cpu is 25%.
– Soren A
2 days ago
okay got it. Thank you
– Gowthamy.95
2 days ago
add a comment |
When I monitor a process using top command it returns the CPU usage for the process like 99.5%. But when I monitor a same process using system monitor (Process tab) for the particular it shows 25%.
- What is the cause of this discrepancy?
- Which value is correct?
top
command or system monitor
screenshot of discrepancy between top and Systems Monitor
Please help me on this.
cpu cpu-load system-monitor
New contributor
When I monitor a process using top command it returns the CPU usage for the process like 99.5%. But when I monitor a same process using system monitor (Process tab) for the particular it shows 25%.
- What is the cause of this discrepancy?
- Which value is correct?
top
command or system monitor
screenshot of discrepancy between top and Systems Monitor
Please help me on this.
cpu cpu-load system-monitor
cpu cpu-load system-monitor
New contributor
New contributor
edited yesterday
Sourav Ghosh
36929
36929
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asked 2 days ago
Gowthamy.95
11
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New contributor
Top reports usage pr (virtual) cpu-core, so 2 cores with hyper-threadings gives 4 cpu's = 100%. System monitor reports 100% for the whole system.
– Soren A
2 days ago
@SorenA Thanks a lot..Basically top command returns the total cpu usage of all cores while System monitor reports average of that isn't it? Am I correct?
– Gowthamy.95
2 days ago
more or less ... what I tried to say was that in top each virtual cpu counts as 100%, so if you have 2 cores with hyper threading it will count as 400%. System monitor counts the whole system as 100%, so one virtuel cpu is 25%.
– Soren A
2 days ago
okay got it. Thank you
– Gowthamy.95
2 days ago
add a comment |
Top reports usage pr (virtual) cpu-core, so 2 cores with hyper-threadings gives 4 cpu's = 100%. System monitor reports 100% for the whole system.
– Soren A
2 days ago
@SorenA Thanks a lot..Basically top command returns the total cpu usage of all cores while System monitor reports average of that isn't it? Am I correct?
– Gowthamy.95
2 days ago
more or less ... what I tried to say was that in top each virtual cpu counts as 100%, so if you have 2 cores with hyper threading it will count as 400%. System monitor counts the whole system as 100%, so one virtuel cpu is 25%.
– Soren A
2 days ago
okay got it. Thank you
– Gowthamy.95
2 days ago
Top reports usage pr (virtual) cpu-core, so 2 cores with hyper-threadings gives 4 cpu's = 100%. System monitor reports 100% for the whole system.
– Soren A
2 days ago
Top reports usage pr (virtual) cpu-core, so 2 cores with hyper-threadings gives 4 cpu's = 100%. System monitor reports 100% for the whole system.
– Soren A
2 days ago
@SorenA Thanks a lot..Basically top command returns the total cpu usage of all cores while System monitor reports average of that isn't it? Am I correct?
– Gowthamy.95
2 days ago
@SorenA Thanks a lot..Basically top command returns the total cpu usage of all cores while System monitor reports average of that isn't it? Am I correct?
– Gowthamy.95
2 days ago
more or less ... what I tried to say was that in top each virtual cpu counts as 100%, so if you have 2 cores with hyper threading it will count as 400%. System monitor counts the whole system as 100%, so one virtuel cpu is 25%.
– Soren A
2 days ago
more or less ... what I tried to say was that in top each virtual cpu counts as 100%, so if you have 2 cores with hyper threading it will count as 400%. System monitor counts the whole system as 100%, so one virtuel cpu is 25%.
– Soren A
2 days ago
okay got it. Thank you
– Gowthamy.95
2 days ago
okay got it. Thank you
– Gowthamy.95
2 days ago
add a comment |
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Top reports usage pr (virtual) cpu-core, so 2 cores with hyper-threadings gives 4 cpu's = 100%. System monitor reports 100% for the whole system.
– Soren A
2 days ago
@SorenA Thanks a lot..Basically top command returns the total cpu usage of all cores while System monitor reports average of that isn't it? Am I correct?
– Gowthamy.95
2 days ago
more or less ... what I tried to say was that in top each virtual cpu counts as 100%, so if you have 2 cores with hyper threading it will count as 400%. System monitor counts the whole system as 100%, so one virtuel cpu is 25%.
– Soren A
2 days ago
okay got it. Thank you
– Gowthamy.95
2 days ago