On 07/17/2012 05:50 AM, Alan Cox wrote: >> Right, I would say that with any CPU core more powerful than this one >> or with more than a few of these, you will also have trouble coming >> up with workloads that really require the CPU performance but don't >> also require a 64 bit virtual address space in either user space >> or kernel. > > There are lots of them - soft radio for example can burn near infinite > CPU resource depending upon the amount you are fishing out, but its pure > throughput.
I think A15 is likely to be a good 32-bit story there. Performance wise, it's awesome. The reason for 64-bit is both emotional ("real servers must be 64-bit! <pound the table and yell>"), and as an opportunity to clean up lots of assumptions and have a standard base, but it's not the end of the 32-bit story. I believe ARM have said many times that they're not giving up on AArch32, and in fact, if you read the public ISA docs you'll see additional 32-bit instructions in v8. Jon. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/