Forum Discussion
N_67263
Nimbostratus
Sep 30, 2011what does "Total Cycles 4.3P" mean?
One of our develoment person asked us what do you mean by "Total Cycles 4.3P" and "Idle Cycles 46.5T" on the F5 LTM. I would like to know this answer and also check where on the GUI are these values being seen. These have some relation to the CPU.
Regards..
8 Replies
- hoolio
Cirrostratus
Hi Nikhil,
See these links for details:
Timing
http://devcentral.f5.com/wiki/iRules.timing.ashx
iRules Optimization 101 - 05 - Evaluating iRule Performance
http://devcentral.f5.com/Default.aspx?tabid=63&articleType=ArticleView&articleId=123
Aaron - N_67263
Nimbostratus
Hi Aaron,
Many thanks.
I am not sure if that answers the question of what is meant by "Total Cycles 4.3P". What does the "P" in that mean, similarly what does "T" mean. Where in the GUI do you think we should see this?
Regards,
Nikhil - N_67263
Nimbostratus
Ok, I see where in the GUI are these values coming from...
Once you click on Overview --> Traffic Summary I see the "Traffic Management CPU Usage" feild which displays the following values:
Total Cycles 5.4P
Idle Cycles 58.4T
Sleep Cycles 5.3P
What do they mean and how are they being calculated?
Regards,
Nikhil Kulkarni. - nitass
Employee
is it what u r looking for?
Timing iRules
http://devcentral.f5.com/Community/GroupDetails/tabid/1082223/asg/50/aft/3650/showtab/groupforums/Default.aspx
hth - N_67263
Nimbostratus
hth, that's not what I am looking for. I am only looking for the Overall CPU management of the F5.
What I see in my F5 device is on Overview --> Traffic Summary I see the "Traffic Management CPU Usage" feild which displays the following values:
Total Cycles 5.4P
Idle Cycles 58.4T
Sleep Cycles 5.3P
I think I have found the answer that when it says 5.4P the "P" just means Perabyte and "T" means Terabytes.
However I would still like to check how these are calculated? What do the values actually tell?
- Nikhil - nitass
Employee
even they were talking about irule's cpu cycle, i think how cpu cycle is calculated is same. - Hamish
Cirrocumulus
They're multipliers (Sometimes referred to as a prefix because they're specified IN FRONT of the unit)....
P = Peta (10^15)
T = Terra (10^12)
G = Giga (10^9)
M = Mega (10^6)
k = kilo (10^3)
So 5.4P is 5.4x10^15... Or 54 followed by 14 zeroes...(And it's not PetaByte, that wouldn't make sense... 5.4 PetaByte Total Cycles just isn't a real thing. It would be 5.4PetaCycles perhaps... [Not Hz BTW, A Hz is 1 cycle/second and there's nothing said about time here])
H - Hamish
Cirrocumulus
Oh... Case is important here... A minor bugbear of mine... So... If I may digress slightly (Hey, you don't HAVE to read it :)...
M != m because M=Mega and m=milli. Likewise b=bit, and B=Byte. Thus
mb is actually milli-bits... And k (kilo) is ALWAYS lower case. Especially if we're talking about SI units...
Sigh.... I feel better now...
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