Forums - CPU UTILIZATION CSR1010

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CPU UTILIZATION CSR1010
641fc925
Join Date: 14 Jun 16
Posts: 5
Posted: Thu, 2016-06-30 13:19
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how can i tell how heavily loaded the cpu is?

i have a csr1011 dev board, running the SDK 2.5.1 base app firmware

wle

 

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Re: CPU UTILIZATION CSR1010
cbs
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Join Date: 4 Mar 15
Location: IoT consultant, Cambridgeshire, UK
Posts: 21
Posted: Fri, 2016-07-15 01:54
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Current consumption is a fairly good guide. Expect ~2mA when the CPU is 100%.

Chris

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Re: CPU UTILIZATION CSR1010
641fc925
Join Date: 14 Jun 16
Posts: 5
Posted: Sun, 2016-07-17 08:18
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i hadn;t thought of that...

 

but how does that give cpu utilization?

isn;t the cpu *always* doing 'something'?

what i need is the time it  is spending in 'idle loops' or not doing useful stuff..

 

also wouldn;t current be most strongly correlated with TX and RX activity, not just 'non-idle time'?

 

wle

 

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Re: CPU UTILIZATION CSR1010
cbs
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Join Date: 4 Mar 15
Location: IoT consultant, Cambridgeshire, UK
Posts: 21
Posted: Tue, 2016-07-19 01:22
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No. Usually (hopefully) the CPU is asleep. When you break into execution with the xIDE debugger you'll almost certainly find it at the SLEEP instruction. That uses different amounts of current depending on the sleep_mode you've selected.

Current correlates with all sorts of things - not least the radio which causes huge spikes you need to filter to get any meaningful measurement. I suppose the question I would ask is: Why do you want to know the CPU utilisation?
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Re: CPU UTILIZATION CSR1010
641fc925
Join Date: 14 Jun 16
Posts: 5
Posted: Wed, 2016-07-20 07:51
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i would want to know it because i had a suspicion that due to my added application code, it may be overloaded with computations and work.

i experienced  "link_loss" disconnects for no known reason, if i could rule   'cpu overloading' out (or in), it would help.

wle.

 

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Re: CPU UTILIZATION CSR1010
Dr. Nissim Zur
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Join Date: 6 Jun 16
Location: Skype: nissim.test CSR1010 External design house
Posts: 235
Posted: Thu, 2016-07-28 19:45
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You can use PIO high/low to monitor your main work in the CPU. 

Then monitor that by an external oscilloscope. 

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