comp.os.linux.development.system Google Group

Re: Linux - retooling from the ground up, for Multicore systems

2010-03-22T11:49:18Z

re...
Pray tell, Hadron Snot Larry Quark.
Tell us meore. We are all ears. "Re-tooled". Interesting
Another fine "true linux advocacy post" from the
"true linux advocate", "kernel hacker", "./configure hero", "emacs user",
"swapfile expert", "X specialist", "CUPS guru", "USB-disk server admin",
"defragger professional", "newsreader magician", "hardware maven", "time

Re: Linux - retooling from the ground up, for Multicore systems

2010-03-22T11:28:04Z

Those "super computers" use, err, a re-tooled Linux. Surely you're not
so dim as to not realise that. Hint : if Koehlmann mentions something
even remotely technical treat it like a turd on your doorstep. Do not
embrace it and wave it around.

Re: Linux - retooling from the ground up, for Multicore systems

2010-03-22T11:19:55Z

Not to worry...
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Re: Linux - retooling from the ground up, for Multicore systems

2010-03-22T10:37:57Z

Penang pulled this Usenet boner:
Gee, two back-to-back google-groups cross-posting trolls about multicore
support. What an odd coincidence!

Re: Linux - retooling from the ground up, for Multicore systems

2010-03-22T10:01:03Z

Any piece of constantly developed software benefits from a total rewrite
every ten years or so.
But who has the time to do it?

Re: Linux - retooling from the ground up, for Multicore systems

2010-03-22T09:53:40Z

See Peter Kohlmann's comment on another thread:
"You mean multicore like the suercomputers running under linux right
now?
You know, those with *thousands* of cores?"

Linux - retooling from the ground up, for Multicore systems

2010-03-22T09:11:38Z

There is an article on OS architecture design truly for the Multi-Core
systems that we are using today.
[link]
I'll leave you some quotes from the article for you guys to think
over.
Maybe Linux could use a retooling, from the ground up, as well.

Re: Can extra processing threads help in this case?

2010-03-22T06:51:25Z

your conclusion does not follow.
wether that will help or not depends on the usage pattern of the ram.
if both threads are reading and writing the same areas of ram at
approximately the same time it may help.
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Re: Can extra processing threads help in this case?

2010-03-22T01:51:13Z

Memtest86 is the source of the specifications that I
reported. I summarized the pertinent details.
As far as I can tell if essentially the only thing that is
changed between two machines (regardless of the details of
this change) is much faster RAM and the response time
increases by 800% then this conclusively proves that the app

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Re: Can extra processing threads help in this case?

2010-03-21T19:40:31Z

Such a combination is hard to imagine, and affects the answer you seek.
Documentation, please. Run memtest86+ ([link]) then
report the measured speeds (L1/L2/L3 cache, memory) in MB/s for both
the old and new systems. Name the hardware, chipset, mainboard maker,
RAM make and model. For instance, a very old Dell laptop with 550MHz

Can extra processing threads help in this case?

2010-03-21T17:18:24Z

I have an application that uses enormous amounts of RAM in a
very memory bandwidth intensive way. I recently upgraded my
hardware to a machine with 600% faster RAM and 32-fold more
L3 cache. This L3 cache is also twice as fast as the prior
machines cache. When I benchmarked my application across the

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