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SubjectRe: [PATCH 0/5] Enable Drivers for Intel MIC X100 Coprocessors.
Hi!

> > > Since it is a PCIe card, it does not have the ability to host hardware
> > > devices for networking, storage and console. We provide these devices
> > > on X100 coprocessors thus enabling a self-bootable equivalent environment
> > > for applications. A key benefit of our solution is that it leverages
> > > the standard virtio framework for network, disk and console devices,
> > > though in our case the virtio framework is used across a PCIe bus.
> >
> > Interesting...
> >
> > > Documentation/mic/mic_overview.txt | 48 +
> > > Documentation/mic/mpssd/.gitignore | 1 +
> > > Documentation/mic/mpssd/Makefile | 20 +
> > > Documentation/mic/mpssd/micctrl | 157 +++
> > > Documentation/mic/mpssd/mpss | 246 +++++
> > > Documentation/mic/mpssd/mpssd.c | 1732 ++++++++++++++++++++++++++++++++++
> > > Documentation/mic/mpssd/mpssd.h | 105 +++
> > > Documentation/mic/mpssd/sysfs.c | 108 +++
> > > drivers/misc/Kconfig | 1 +
> > > drivers/misc/Makefile | 1 +
> > > drivers/misc/mic/Kconfig | 56 ++
> > > drivers/misc/mic/Makefile | 6 +
> > > drivers/misc/mic/card/Makefile | 11 +
> > > drivers/misc/mic/card/mic_common.h | 43 +
> > > drivers/misc/mic/card/mic_debugfs.c | 139 +++
> > > drivers/misc/mic/card/mic_debugfs.h | 40 +
> > > drivers/misc/mic/card/mic_device.c | 311 ++++++
> > > drivers/misc/mic/card/mic_device.h | 106 +++
> > > drivers/misc/mic/card/mic_virtio.c | 643 +++++++++++++
> > > drivers/misc/mic/card/mic_virtio.h | 79 ++
> > > drivers/misc/mic/card/mic_x100.c | 253 +++++
> > > drivers/misc/mic/card/mic_x100.h | 53 ++
> > > drivers/misc/mic/common/mic_device.h | 85 ++
> > > drivers/misc/mic/host/Makefile | 13 +
> > > drivers/misc/mic/host/mic_boot.c | 181 ++++
> >
> > So... there are basically separate computers running on PCIe card
> > plugged into host computer, right?
> >
>
> They are PCIe form factor Coprocessors plugged into the host.
>
> > Maybe we should have something more promintent than drivers/misc for
> > this, then? Like drivers/multicomputer?
> >
>
> multicomputer" is an interesting name for these kind of devices but has
> several issues:
> a) The definition I found for multicomputer online was "A computer made
> up of several computers. The term generally refers to an architecture in
> which each processor has its own memory rather than multiple processors
> with a shared memory. A multicore computer, although it sounds similar,
> would not be a multicomputer because the multiple cores share a common
> memory." Intel MIC X100 devices typically have upto 244 CPUs (61 cores)
> on the card sharing common card memory so multicomputer would not be
> accurate based on this definition.

Well... you have your "host" computer, and than (potentially several)
Intel MIC devices, which are basically separate computers. So X100 is
not a multicomputer, but machine with several X100 cards certainly is
multicomputer.

> b) X100 MIC devices have always been referred to Coprocessors and never
> as multicomputers in product specifications @
> http://software.intel.com/en-us/mic-developer

Coprocessor sounds like i487, but why not.

> c) multicomputer is a very long path name.

Agreed it is long. drivers/coproc?

[I guess we'll get similar hardware from different vendors in
future. It would make sense having it at common place.]

Pavel

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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