Directed Test
From gem5
The Directed Tester is for generating a stream of requests, where two consecutive requests are separated by a fixed number of bytes. The requests can be a mix of reads and writes, or they can be invalidations. This can be useful in testing a prefetcher or for generally testing a coherence protocol implemented in Ruby. The source files related to the tester are present in the directory src/cpu/testers/directedtest. The file configs/examples/ruby_direct_test.py is used for configuration and execution of the test. For example, the following command can be used for testing --
./build/X86/gem5.opt ./configs/example/ruby_direct_test.py
Though one can specify many different options to the directed tester, some of them are note worthy.
| Parameter | Description |
|---|---|
| -n, --num-cpus | Number of cpus injecting load/store requests to the memory system. |
| -m, --maxtick | Number of cycles to simulate. |
| -l, --checks | Number of requests to be performed. |
| --test-type | SeriesGetx / SeriesGets / Invalidate |
| --random_seed | Seed for initialization of the random number generator. |
