System Monitor and top reporting wildly different cpu usage for process
0
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?
topcommand or system monitor
screenshot of discrepancy between top and Systems Monitor
Please help me on this.
cpu cpu-load system-monitor
edited yesterday
Sourav Ghosh
36929
asked 2 days ago
Gowthamy.95
11
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Gowthamy.95 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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add a comment |
0
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?
topcommand or system monitor
screenshot of discrepancy between top and Systems Monitor
Please help me on this.
cpu cpu-load system-monitor
edited yesterday
Sourav Ghosh
36929
asked 2 days ago
Gowthamy.95
11
New contributor
Gowthamy.95 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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 |
0
0
0
1
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?
topcommand or system monitor
screenshot of discrepancy between top and Systems Monitor
Please help me on this.
cpu cpu-load system-monitor
edited yesterday
Sourav Ghosh
36929
asked 2 days ago
Gowthamy.95
11
New contributor
Gowthamy.95 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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?
topcommand 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
edited yesterday
Sourav Ghosh
36929
asked 2 days ago
Gowthamy.95
11
New contributor
Gowthamy.95 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited yesterday
Sourav Ghosh
36929
asked 2 days ago
Gowthamy.95
11
New contributor
Gowthamy.95 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited yesterday
Sourav Ghosh
36929
edited yesterday
Sourav Ghosh
36929
edited yesterday
Sourav Ghosh
36929
36929
asked 2 days ago
Gowthamy.95
11
New contributor
Gowthamy.95 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 days ago
Gowthamy.95
11
asked 2 days ago
Gowthamy.95
11
11
New contributor
Gowthamy.95 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Gowthamy.95 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Gowthamy.95 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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