Awesome

deflatebench - a tool that can benchmark minigzip/minideflate

This tool must be run from the folder where an executable minigzip or minideflate exist.
Ex: ../deflatebench/deflatebench.py --gen. (I suggest making a symlink to it though, for example in /usr/bin/)
You must provide the tool with testdata files.

Prerequisites

To setup the required Python packages use the following command:

python3 -m pip install -r requirements.txt

Config Files

• --write parameter creates a new config file as ~/deflatebench.conf
• Supports profiles in separate config files
• Supports overriding config files with command-line parameters

System Tuning

_{PS: Several of these require root or sudo permissions}

• Supports perf or time for measuring cputime [Default perf]
• Supports chrt to set real-time priority [Default OFF]
• Supports nosync library preloading [Default OFF]
• Supports turboctl for disabling cpu turbo while benchmarking [Default OFF]
  • turboctl script included in repo supports disabling turbo with intel_pstate cpu-governor, and should be copied do /usr/bin/turboctl and added to sudo config
• Supports cpupower for locking cpu speed and disabling powersaving while benchmarking [Default OFF]
  • cpu_std_minspeed configures normal minimal cpu speed in Mhz to reset back to after benchmark [Default 1000]
  • cpu_std_maxspeed configures normal maxumum (non-Turbo) cpu speed in Mhz to reset back to after benchmark [Default 2200]
  • cpu_bench_speed configure cpu speed to use while benchmarking, should be same as cpu normal non-turbo max speed or a little slower(200Mhz for example) [Default 2000]

Test configuration

• Specify number of testruns [Default 15]
• Specify number of worst results to ignore [Default 5]
• Specify minlevel [Default 0]
• Specify maxlevel [Default 9]
• Specify testtool either minigzip or minideflate [Default minigzip]

Test modes

• Single, tests all levels using the same testdata-file
• Multi, allows you to specify separate testdata-files per level
• Gen, lets you provide the tool with a single testdata-file, and the tool will generate files of the appropriate sizes (in MiB) according to what is specified under [Testdata_Gen] in the configfile
  • Gen works by concatenating the source file multiple times until the asked for size is met or exceeded.
  • This works best with a relatively small input file. I use a 15MiB file, and let all levels get a generated size that is a multiple of 15MiB.
• Please note that for best performance, the temp folder specified in the config [Default /tmp/] should be tmpfs or ramdisk.

Example Testdata

As a convenience, I have created a couple uncompressed tar files that can be used for single and gen testmodes:

• 202MiB full Silesia testcorpus
• 15MiB custom cropped Silesia testcorpus

The original source of this testcorpus is here: Silesia