ARM Cortex A15 "Eagle" Performance Benchmark Estimate

ARM has given few hints about the performance of the Cortex A15 "Eagle" MPcore it announced last week; the chip which should come in 2012 will be available in mono, dual, quad, octo and 16-core configurations clocked at speeds up to 2.5GHz.

According to ARM, the new processor will deliver "over five times the performance of today's advanced smartphone" without consuming more power; to make things more complicated, ARM adds that it will provide "over 10 times the aggregate performance of ARM processor-based infrastructure platforms".

We are not sure whether ARM is talking of the Cortex A8 which has plenty of designs out or the A9, which is already out but only on prototypes.

Gigaom published a series of slides here, with the last one showing the relative performance of the various flavours of the A15 compared to the ARM11 as used in the HTC Wildfire and the iPhone 3G.

The graph on the slide shows that performance scales linearly when more cores are being added and that an Octo Cortex A15 is likely to be at least 20 times faster than an ARM11 while the first slide leaves us to believe that the Cortex A8 would be roughly five times less powerful than a dual core Cortex A15.

We suspect that some of the performance gains would come from the massive increase in clock speed (jumping from 1GHz to 2.5GHz), which means that at equal speeds, a Cortex A15 MPcore will be twice as powerful as the Cortex A9.

The only benchmark we have about how the Cortex-A9 MPCore performs compared to other x86 processors come from the Coremark where it scores 11.522 Coremark per MHz. Doubling it means that a single core Cortex A15 running at 2GHz may match an Intel Xeon X5450 running at 3GHz.