convert CPU load to CPU utilization in %
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From: Dolphin on 11 Dec 2009 00:32 Hi, Is it possible to convert the cpu load average (5min) got from the output of uptime to cpu utilization in %? If so, how to? Thanks in advance.
From: Ian Collins on 11 Dec 2009 01:33 Dolphin wrote: > Hi, > > Is it possible to convert the cpu load average (5min) got from the > output of uptime to cpu utilization in %? If so, how to? Load average is for the system, not the (a) CPU. -- Ian Collins
From: Andrew Gabriel on 13 Dec 2009 15:25 In article <bb06aac4-258c-453f-9648-85cc4df0121a(a)g1g2000pra.googlegroups.com>, Dolphin <yc282004(a)yahoo.com.sg> writes: > Hi, > > Is it possible to convert the cpu load average (5min) got from the > output of uptime to cpu utilization in %? If so, how to? > > Thanks in advance. loadave is (average) count of runnable threads, regardless if they are running on a CPU or waiting to run, and modulo sampling errors. Whilst CPU usage can't exceed 100%, loadave can exceed number of CPUs. I think all you can say is that if loadave < number of CPUs, then there's some idle time. However, with cores and strands nowadays, just what a CPU is in this context isn't really clear anymore either. So the answer is basically No. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup]
From: David Combs on 30 Dec 2009 23:01
In article <hg3ije$6ft$1(a)news.eternal-september.org>, Andrew Gabriel <andrew(a)cucumber.demon.co.uk> wrote: >In article <bb06aac4-258c-453f-9648-85cc4df0121a(a)g1g2000pra.googlegroups.com>, > Dolphin <yc282004(a)yahoo.com.sg> writes: >> Hi, >> >> Is it possible to convert the cpu load average (5min) got from the >> output of uptime to cpu utilization in %? If so, how to? >> >> Thanks in advance. > >loadave is (average) count of runnable threads, regardless if >they are running on a CPU or waiting to run, and modulo >sampling errors. > >Whilst CPU usage can't exceed 100%, loadave can exceed number >of CPUs. I think all you can say is that if loadave < number >of CPUs, then there's some idle time. However, with cores >and strands nowadays, just what a CPU is in this context What's a "strand"? THANKS! >isn't really clear anymore either. > >So the answer is basically No. > >-- >Andrew Gabriel >[email address is not usable -- followup in the newsgroup] David |