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Jforex Client API - high cpu usage
sereja
 Post subject: Jforex Client API - high cpu usage Post rating: 0   New post Posted: Thu 04 Jul, 2013, 08:50 

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I'm trying to use the API to fetch account history from several accounts, I have discovered that the IClient is a singleton (which not making any sense), so it means I need to run my app in a separate process for each account - running a single instance causes the cpu to spike to 70%, 2 instances causes it to jump to 100 - in other words it's not usable.

Is this normal? I've discovered lots of bugs with your API as well.

Tested on core i3- 2120 8gb ram, windows 7 64bit.
The logic of the app is pretty simple - connect to account, subscribe to symbols, get history, disconnect.

Please advise.
 
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 Post subject: Re: Jforex Client API - high cpu usage Post rating: 0   New post Posted: Thu 04 Jul, 2013, 09:00 
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sereja wrote:
I have discovered that the IClient is a singleton (which not making any sense)
It is a system restriction by design.
sereja wrote:
running a single instance causes the cpu to spike to 70%, 2 instances causes it to jump to 100 - in other words it's not usable.
Please provide a program which replicates the case.
sereja wrote:
Is this normal? I've discovered lots of bugs with your API as well.
Report them here: viewforum.php?f=16
 
sereja
 Post subject: Re: Jforex Client API - high cpu usage Post rating: 0   New post Posted: Thu 04 Jul, 2013, 09:52 

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code attached.
I've also attached JRockit dump so you can see what exactly causes the cpu to spike.

using version JForex-API-2.7.9.


Attachments:
flight_recording_2013-07-04_08_49_42.7z [800.83 KiB]
Downloaded 329 times
JForexClient - Copy.7z [9.15 KiB]
Downloaded 322 times
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 Post subject: Re: Jforex Client API - high cpu usage Post rating: 0   New post Posted: Thu 04 Jul, 2013, 11:09 
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By a problem-replication program we mean a single-file, IDE-independent java program which replicates the case.
 
sereja
 Post subject: Re: Jforex Client API - high cpu usage Post rating: 0   New post Posted: Thu 04 Jul, 2013, 12:44 

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please check this files


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src.7z [2.06 KiB]
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 Post subject: Re: Jforex Client API - high cpu usage Post rating: 0   New post Posted: Fri 05 Jul, 2013, 17:23 
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For us the CPU usage during the strategy run was 7 to 18% and we managed to launch without a problem 6 instances of the program at a time -with each next instance the average CPU usage of a program instance dropped. We tested on a 3 core workstation with other parameters just about the same as yours.
 
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