Multi-Core/Multitasking

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Multi-Core/Multitasking

Postby TBlack » Sat Feb 07, 2015 9:57 am

Assume these are similar. I understand NB uses some of these features. I'm running an I7 8-Core Processor and have NB set up for High Power Computer.

How much does NB take advantage of this processor? UnRar functions for sure, but it seems like since 6.60 came out, I've seen some NB processes freeze for while while UnRaring a file, i.e. scrolling a screen and/or downloading .jpg files or maybe even screen refreshes. It seems NB freezes in certain situations during an UnRar. I don't remember previous versions doing that.

Thanks
Tom
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Re: Multi-Core/Multitasking

Postby Quade » Sat Feb 07, 2015 10:56 am

UnRar functions for sure,


Actually unrar is a single core, serial process. Because of how rar works you can't actually have multiple threads decompressing. Even the commercial unrar program simply uses one thread to read from disk while another does the decompress. To answer your question. Newsbin is heavily threaded. The downloads for example, each connection is a unique thread. Only a single thread writes to disk though because spinning disks do poorly when more than one thing at a time writes to them. Once everyone is on SSD, that special handling can go away.

How much does NB take advantage of this processor? UnRar functions for sure, but it seems like since 6.60 came out, I've seen some NB processes freeze for while while UnRaring a file, i.e. scrolling a screen and/or downloading .jpg files or maybe even screen refreshes. It seems NB freezes in certain situations during an UnRar. I don't remember previous versions doing that.


I'd say this is just something that needs fixing.
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Re: Multi-Core/Multitasking

Postby TBlack » Sat Feb 07, 2015 11:19 am

OK, thanks for the insights and discussion.
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Re: Multi-Core/Multitasking

Postby OldGuyWalking » Sun Feb 08, 2015 10:25 pm

I also appreciate the question and response. I have an i5 quad-core desktop and when Newsbin is unRAR'ing there are 3 applications that I have running routinely that freeze until the process is complete. At least this (sorta kinda) explains why.
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Re: Multi-Core/Multitasking

Postby Quade » Mon Feb 09, 2015 8:44 am

there are 3 applications that I have running routinely that freeze until the process is complete. At least this (sorta kinda) explains why.


That probably shouldn't be happening. Just because Newsbin is using multiple cores, that doesn't prevent other applications from also using them. If I had to guess I'd think that any actual freezing is caused by disk IO and maybe security software trying to monitor the new file that's being written. What kind of disk are you unraring to?
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