loadmaster

loadmaster(负载大师) is designed to waste your machine performance. Powerful, flexible, simple.

Prerequisites

• Linux
• CMake 3.1 +
• C++ compiler with C++20 support

Build & Run

• Typical CMake building routine
• Statically linked by default
• Customizable runtime arguments specified by CLI args - see <exe> -h
• It's recommended to rename the executable as you want

Workload

CPU

• Load range is [0, 100] (each core)
• System overall CPU load 60% is a threshold; loadmaster CPU module will be temporarily disabled
• Scheduling interval is 100 milliseconds (kScheduleIntervalMS)
• Specify target load by -l <load>; default: 200 (kDefaultCpuLoad)
• Specify target worker thread number by -c <count>; default: minimum required by load
• Specify target scheduling algorithm (described below) by -ca <algorithm>

Default Scheduler

• Try to dispatch target load to each worker thread uniformly

Random Normal Scheduler

• Worker thread load changes every 10 seconds
• Average load in 5 minutes is the specified value
• Normal distribution is used in load calculation

Memory

This module is disabled by default. Use -m <memory_mib> to specify an extra memory usage, then this process won't be seemed so weird.

Default Scheduler

• Memory usage changes every 45 seconds (kMemoryScheduleIntervalSecond)
• Range: memory_mib * rand(kMemoryMinimumRatio, 1.0), 4KiB aligned
• Memory block will be filled, and if block size larger than 32 MiB (kMemoryNoThreadSpawnThresholdMiB), a new thread will be temporarily spawned in order to allocate and fill memory

Usage Sample

$ ./loadmaster -l 180 -ca rand_normal -m 32