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Hello,
I am trying to configure some code which will run code on an azure vm. this is very compute intensive, but does not require too much in the way of other resources.
the analytics runs within docker (desktop), which happens to be running on Windows OS.
the analytics are parallelized across a number of processes, and how many processes are to be started is part of the configuration (based on the number of available cpus).
if I run this docker code on a local physical windows server (not azure, and not a vm), then it behaves sensibly. there are 88 cores on this machine, and the task manager shows a cpu usage of around 50 % - which is reasonable.
i am now trying to set this up to run on an azure vm, I have tried two different configurations, one with 32 vcpus and one with 8 vcpus. when I run the code, the compute processes are launched, and the code runs.
However, the task manager persistently shows a CPU usage of < 5 % on both the 8 and 32 vcpu machines - whereas both of these should be more or less saturated at 100%.
The behavior that I am seeing appears to suggest that the cpus probably are saturated (as expected), but the task manager tells me completely the opposite story. I cannot explain what I am seeing, even to an order of magnitude using the usual 'back of the envelope' calculations ...
Why might this be happening ?
Regards
A
it says there is an answer - but I cannot see it ...
sounds like the previous version of your post hasn't been evicted from the edge cache yet. Here is what I wrote:
Please take a look at Percentage CPU metric in the Azure portal for your VM(s). You can see this on Overview blade -- Monitoring tab -- Performance and utilization of each VM.
Hi,
Please take a look at Percentage CPU metric in the Azure portal for your VM(s). You can see this on Overview blade -- Monitoring tab -- Performance and utilization of each VM.
-TP
Hello,
yes - the vm monitoring tab on the portal does show the expected CPU usage.
using the portal is ok for managing the long term load on the vm, but not so useful when working interactively - and checking the load on the machine for different software configurations.
why does the task manager shows 3% cpu load, when the real value is 100% ?
is there a windows utility that I can use interactively within the vm, when I am logged into the vm, to see what is really going on ? this is very inconvenient.
A
Take a look in Perfmon.msc inside the VM for the appropriate counters that will give you a better idea of real CPU usage. The host metric (what you see in Azure portal as Percentage CPU) gives best reading.
For example, on physical machine with Hyper-V you would look under Hyper-V counters to get a more accurate reading for CPU utilization of VMs, so with VM with nested virtualization you would do something similar. I'm unsure if there are any Docker counters that would be of use.