SNBench

A micro benchmark suite that quantifies the performance impact of IEEE-754 subnormal numbers on arithmetic instructions and transcendental functions.

Features

• Covers all the possible input/output operands configurations in which subnormal numbers appear
• Covers both the scalar instructions and vector instructions
• Covers both the scalar instructions and vector transcendental functions from five math libraries
• support x86 and Arm CPUs

Directory Layout

• inst_latency_test: measure the latency of ADD, MUL, DIV and SQRT instructions on x86 and Arm CPUs.
• inst_latency_throughput_test: measure the throughput of of ADD, MUL, DIV and SQRT instructions on x86 and Arm CPUs.
• fma_latency_throughput_test: measure the latency and throughput of of the FMA (Fused Multiply Add) instruction on x86 and Arm CPUs.
• math_func_throughput_test: measure the throughput of the transcendental math functions

Dependencies

• PAPI: collect the CPU cyles on x86
• Compilers
  • The GCC Compiler
  • The Intel Compiler: to test the math library SVML
  • The AOCC Compiler: to test the math library AOCL-LibM
• Math libraries:
  • the math library in GLIBC
  • Intel SVML
  • AOCL-LibM: the math library in AOCL
  • SLEEF
  • Arm Optimized Routines (AML)