This commit adds a performance benchmark for the end-to-end channel simulation pipeline, named `test_channel_simulation`. Its methodology is as follows:
- It systematically iterates through a matrix of test cases, varying
MIMO configuration (Tx/Rx antennas), signal length, and channel
length.
- For each case, it runs both the full CPU pipeline (`multipath_channel_float`
followed by `add_noise_float`) and the single `run_channel_pipeline_cuda`
function.
- It measures the average execution time for both implementations over
many trials and calculates the resulting speedup.
This provides a performance characterization of the GPU pipeline across different workloads and directly compares it to the CPU baseline.
This commit adds a new standalone benchmark, `test_noise`, to measure
and compare the performance of the CPU and CUDA implementations of noise
generation.
The benchmark's methodology is as follows:
- It iterates through various configurations, including different
numbers of receive antennas and signal lengths.
- For each configuration, it runs both the CPU (`add_noise_float`)
and CUDA (`add_noise_cuda`) functions multiple times to get a stable
average execution time.
- It prints a formatted table comparing the CPU and GPU latencies and
calculates the resulting speedup.
This commit adds a new standalone unit test, `test_multipath`, to
validate the CUDA implementation of the multipath channel.
The test performs the following steps:
- Generates a random input signal and channel model.
- Runs the CPU version (`multipath_channel_float`) to get a baseline result.
- Runs the CUDA version (`multipath_channel_cuda`) with the same inputs.
- Compares the two outputs by calculating the Mean Squared Error (MSE)
and ensures it is below a small tolerance.
Hide normal table initialization of Ziggurat generator from outside to
force the usage of randominit() for RNG initialization. In this step,
remove the randominit() seed parameter and only rely on OAI_RNGSEED for
a consistent RNG initialization, as this parameter was used differently
("0" as fixed number or to force a random seed).
Now, only use OAI_RNGSEED env variable to force the usage of a fixed
seed.
The test was actually never executed correctly (unsigned -10 is never <= 10), and log2_approx64_ref() was not accurate enough.
Therefore replace it by directly comparing one value above and one value below each rounding boundary.
To skip the test, we use the gtest command line parameter "--gtest_filter" to filter out the unwanted test.
This parameter is described as follows:
--gtest_filter=POSITIVE_PATTERNS[-NEGATIVE_PATTERNS]
Run only the tests whose name matches one of the positive patterns but
none of the negative patterns. '?' matches any single character; '*'
matches any substring; ':' separates two patterns.
This commit introduces google benchmark library and one benchmark for
rotate_cpx_vector. Also extracted common tools used in testcases for
generation and allocation of byte aligned vectors in phy_test_tools.hpp
Nika Ghaderi