Because we assume perf(1) = 1 here, what the relationship between perf(r) and perf(1), linear or any other?
kayvonf
perf(r) is just a function that returns the single-threaded throughput of a processor that built r units of hardware. On the next slide we modeled perf(r) as sqrt(r) so more resources doesn't result in linearly proportional increases in single threaded performance.
kayvonf
This section of the lecture was taken from "Amdahl's Law in the Multi-Core Era", by Hill and Marty, IEEE Computer 2008.
Because we assume perf(1) = 1 here, what the relationship between perf(r) and perf(1), linear or any other?
perf(r)is just a function that returns the single-threaded throughput of a processor that builtrunits of hardware. On the next slide we modeledperf(r)assqrt(r)so more resources doesn't result in linearly proportional increases in single threaded performance.This section of the lecture was taken from "Amdahl's Law in the Multi-Core Era", by Hill and Marty, IEEE Computer 2008.
http://research.cs.wisc.edu/multifacet/papers/ieeecomputer08_amdahl_multicore.pdf