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I think i have made a mistake
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Ramine
Dec 8, 2014, 5:24:29 PM12/8/14
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Hello,
I think i have made a mistake about the follwing reader-writer lock of
Joe Duffy:
http://joeduffyblog.com/2009/02/20/a-more-scalable-readerwriter-lock-and-a-bit-less-harsh-consideration-of-the-idea/
Since a cache-line transfer between cores is not at all expensive,
so the serial part of the Amdahl's law for this reader-writer
above will still be smaller with more and more cores,
so this will make this reader-writer lock above of Joe Duffy
really scalable on read-mostly scenarios.
Thank you,
Amine Moulay Ramdane.
I think i have made a mistake about the follwing reader-writer lock of
Joe Duffy:
http://joeduffyblog.com/2009/02/20/a-more-scalable-readerwriter-lock-and-a-bit-less-harsh-consideration-of-the-idea/
Since a cache-line transfer between cores is not at all expensive,
so the serial part of the Amdahl's law for this reader-writer
above will still be smaller with more and more cores,
so this will make this reader-writer lock above of Joe Duffy
really scalable on read-mostly scenarios.
Thank you,
Amine Moulay Ramdane.
Chris M. Thomasson
Dec 11, 2014, 12:12:43 AM12/11/14
to
> "Ramine" wrote in message news:m658e8$vpp$2...@dont-email.me...
> Hello,
> I think i have made a mistake about the follwing reader-writer lock of
> Joe Duffy:
> http://joeduffyblog.com/2009/02/20/a-more-scalable-readerwriter-lock-and-a-bit-less-harsh-consideration-of-the-idea/
No, it is a bit of garbage. All of the readers have to spin on that global
writers counter. Yuck!
;^/
> Hello,
> I think i have made a mistake about the follwing reader-writer lock of
> Joe Duffy:
> http://joeduffyblog.com/2009/02/20/a-more-scalable-readerwriter-lock-and-a-bit-less-harsh-consideration-of-the-idea/
writers counter. Yuck!
;^/
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