Fault Injection
ExperimentsCPU Experiment
The CPU experiment generates high load for one or more CPU cores. It does this by running expensive arithmetic operations across a number of threads (one for each core targeted). When the CPU Gremlin runs, the OS Scheduler decides where the process will run and your application (and all other processes) will compete for CPU time. There's no guarantee that our process will all block others.
Options
| Parameter | Flag | Required | Default | Version | Description |
|---|---|---|---|---|---|
| Cores | -c int | False | 1 | 0.0.1 | The number of cores to try to utilize. |
| Percent | -p <0-100> | False | 100 | 2.11.0 | The percent of each core to utilize. |
| All Cores | -a | False | False | 2.11.0 | If set, consume all available cores (cannot be used with -c parameter). |
| Length | -l int | False | 60 | 0.0.1 | The length of the experiment (seconds). |
Example
CPU experiments are additive up to the available CPU on the host. For example, if the typical host CPU usage is 50% and you execute a CPU Attack of 25% (magnitude), CPU usage will be increased to approximately 75% during the experiment.