RE: [PATCH 1/1] Bumps limit of maximum core ID from 32 to 128.

From	"Odzioba, Lukasz" <lukasz.odzioba@intel.com>
Newsgroups	linux.kernel
Subject	RE: [PATCH 1/1] Bumps limit of maximum core ID from 32 to 128.
Date	2015-10-14 00:50 +0200
Message-ID	<qjgyl-3GV-9@gated-at.bofh.it> (permalink)
References	<qiJVM-6sh-15@gated-at.bofh.it> <qjewz-LU-31@gated-at.bofh.it> <qjfVE-2WZ-9@gated-at.bofh.it> <qjgeZ-3jk-31@gated-at.bofh.it>
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On Wednesday, October 14, 2015 at 12:26 AM, Guenter Roeck wrote:
> Pardon my ignorance ... those are Xeon Phi processors, and support up to
> 244 threads (for Knights Corner). Programming datasheet isn't easily available,
> so I have to guess a bit. Following the processor numbering scheme of "ordinary"
> processors, the CPU ID can therefore be up to 244 (at least) already today,
> meaning the limit would have to be 256 (assuming that the processor does support
> per-core temperature sensors). On the other side, the public datasheet suggests
> that there are only three temperature sensors.

> What am I missing here ?

Knights Corner can have up to 61 cores with 4 threads per core, so up to 244 threads.
All HT siblings reads temperature from the same core and coretemp driver is aware of it.
That's it needs just one temp_data structure for all threads on given core.
I tested 128 on real HW myself.

Thanks,
Lukas
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Thread

[PATCH 1/1] Bumps limit of maximum core ID from 32 to 128. Lukasz Odzioba <lukasz.odzioba@intel.com> - 2015-10-12 14:00 +0200
  Re: [PATCH 1/1] Bumps limit of maximum core ID from 32 to 128. Guenter Roeck <linux@roeck-us.net> - 2015-10-13 22:40 +0200
    Re: [lm-sensors] [PATCH 1/1] Bumps limit of maximum core ID from 32  to 128. Phil Pokorny <ppokorny@penguincomputing.com> - 2015-10-13 23:10 +0200
      Re: [lm-sensors] [PATCH 1/1] Bumps limit of maximum core ID from 32  to 128. Guenter Roeck <linux@roeck-us.net> - 2015-10-13 23:30 +0200
    RE: [PATCH 1/1] Bumps limit of maximum core ID from 32 to 128. "Odzioba, Lukasz" <lukasz.odzioba@intel.com> - 2015-10-14 00:10 +0200
      Re: [PATCH 1/1] Bumps limit of maximum core ID from 32 to 128. Guenter Roeck <linux@roeck-us.net> - 2015-10-14 00:30 +0200
        RE: [PATCH 1/1] Bumps limit of maximum core ID from 32 to 128. "Odzioba, Lukasz" <lukasz.odzioba@intel.com> - 2015-10-14 00:50 +0200
  Re: [PATCH 1/1] Bumps limit of maximum core ID from 32 to 128. Guenter Roeck <linux@roeck-us.net> - 2015-10-14 03:20 +0200
    RE: [PATCH 1/1] Bumps limit of maximum core ID from 32 to 128. "Odzioba, Lukasz" <lukasz.odzioba@intel.com> - 2015-10-14 13:40 +0200
      Re: [PATCH 1/1] Bumps limit of maximum core ID from 32 to 128. Guenter Roeck <linux@roeck-us.net> - 2015-10-14 16:10 +0200
        RE: [PATCH 1/1] Bumps limit of maximum core ID from 32 to 128. "Odzioba, Lukasz" <lukasz.odzioba@intel.com> - 2015-10-16 00:10 +0200

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