Module for Benchmarking the Linux Allocator

This module contains multiple kernelspace benchmarks for the Linux allocator:

• bulk: Parallel allocation of a huge number of pages. In a second step, they are freed in parallel.
• repeat: Free and reallocate the same page over and over.
• rand: Allocates the available memory and reallocate a percentage randomly in parallel.
• frag: Similar to rand but measure fragmentation instead of runtime

Usage

Building the module.

make LINUX_BUILD_DIR=../llfree-linux/build-llfree-vm LLVM=1

Load the benchmark module.

sudo insmod alloc.ko

Execute the rand benchmark on 1, 2 and 4 cores 4 times and allocate 1024 pages.

echo "bulk 4 1024 0 1,2,4" | sudo tee /proc/alloc/run

Read the results.

cat /proc/alloc/out
# For frag also
cat /proc/alloc/fragout

FIXME: If the results are larger than 4K, this file has to be read multiple times.