2048 CPUs [was: Re: New filesystem for Linux]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Does one Linux kernel run on system with 1024 cpus? I guess it
must fry spinlocks... (or even lockup due to spinlock livelocks)

The SGI Altix can have 2048 CPUs.

And does it run one image of Linux? Or more images each on few cpus?

How do they solve problem with spinlock livelocks?

If time-spent-outside-spinlock/time-spent-in-spinlock < number-of-cpus, the spinlock livelock may happen --- this condition is not true normally with 2 or 4 cpus, but for that high amount of cpus, there is a danger.

Or do they have some special hardware spinlock instruction that guarantees fairness?

Mikulas
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux