by Greg Pfister
Multicore is the wave of the future. Cloud Computing is the wave of the future. Do they get along? My take: Eh. Sorta. There are the usual problems with parallel programming support, despite hubbub about parallel languages and runtimes and ever bigger multicores.
Multicore announcements in particular have been rampant recently. Not just the usual drumbeat from Intel and AMD; that continues, out to 8-way, 12-way, and onward to the future. Now more extreme systems are showing their heads, such as ScaleMP announcing vSMP for the Cloud, (and also for SMB), a way of gluing together X86 multicore systems into even larger shared-memory (NUMA) systems. 3Leaf is doing also doing essentially the same thing. Tilera just announced a 100-core chip product, beating Intel and others to the punch.
What’s in the clouds for multicore?
Amazon’s instance types and pricing do take muticore into account: at the low end small Linux is $0.085/hour for 1 core, nominally 1 GHz; and at the high end, still Linux, you can get “Extra-large High CPU” Linux is $0.68/hour for 8 cores, 2.5GHz each. So, assuming perfect parallel scaling, that’s about 20X performance for 8X the price, a good deal. (I simplified 1 Amazon compute unit to 1 GHz. Amazon says it’s 1.0-1.2 GHz 2007 Opteron or Xeon.)
