Update README

Signed-off-by: Trivernis <trivernis@protonmail.com>

README.md

@@ -8,7 +8,7 @@ directly on the CPU.
 
 You need a rust toolchain installation and the OpenCL headers.
 
-```sh
+```
 USAGE:
     rust-opencl-demo <SUBCOMMAND>
 
@@ -17,8 +17,94 @@ FLAGS:
     -V, --version    Prints version information
 
 SUBCOMMANDS:
-    calculate-primes    
+    bench-global-size    Benchmarks the global size (number of tasks) value
+    bench-local-size     Benchmarks the local size value
+    calculate-primes     Calculates primes on the GPU
     help                 Prints this message or the help of the given subcommand(s)
+    info                 Prints GPU information
+```
+
+### Bench Global Size
+
+```
+Benchmarks the global size (number of tasks) value
+
+USAGE:
+    rust-opencl-demo bench-global-size [OPTIONS]
+
+FLAGS:
+    -h, --help       Prints help information
+    -V, --version    Prints version information
+
+OPTIONS:
+    -o, --bench-output <benchmark-file>            The output file for timings [default: bench.csv]
+    -n, --calculation-steps <calculation-steps>
+            How many calculations steps should be done per GPU thread [default: 1000000]
+
+        --global-size-start <global-size-start>    The start value for the used global size [default: 1024]
+        --global-size-step <global-size-step>      The step value for the used global size [default: 128]
+        --global-size-stop <global-size-stop>      The stop value for the used global size [default: 1048576]
+        --local-size <local-size>                  The maximum number of tasks for the benchmark [default: 128]
+    -r, --repetitions <repetitions>
+            The average of n runs that is used instead of using one value only. By default the benchmark for each step
+            is only run once [default: 1]
+```
+
+### Bench Local Size
+
+```
+Benchmarks the local size value
+
+USAGE:
+    rust-opencl-demo bench-local-size [OPTIONS]
+
+FLAGS:
+    -h, --help       Prints help information
+    -V, --version    Prints version information
+
+OPTIONS:
+    -o, --bench-output <benchmark-file>            The output file for timings [default: bench.csv]
+    -n, --calculation-steps <calculation-steps>
+            How many calculations steps should be done per GPU thread [default: 1000000]
+
+        --global-size <global-size>                The maximum number of tasks for the benchmark [default: 6144]
+        --local-size-start <local-size-start>      The initial number for the local size [default: 4]
+        --local-size-step <local-size-step>        The amount the local size increases by every step [default: 4]
+        --local-size-stop <local-size-stop>
+            The maximum amount of the local size Can't be greater than the maximum local size of the gpu that can be
+            retrieved with the info command [default: 1024]
+    -r, --repetitions <repetitions>
+            The average of n runs that is used instead of using one value only. By default the benchmark for each step
+            is only run once [default: 1]
+```
+
+### Calculate Primes
+
+```
+Calculates primes on the GPU
+
+USAGE:
+    rust-opencl-demo calculate-primes [FLAGS] [OPTIONS]
+
+FLAGS:
+        --cpu-validate    If the calculated prime numbers should be validated on the cpu by a simple prime algorithm
+    -h, --help            Prints help information
+        --no-cache        If the prime numbers should be used for the divisibility check instead of using an optimized
+                          auto-increment loop
+    -V, --version         Prints version information
+
+OPTIONS:
+        --local-size <local-size>
+            The local size for the tasks. The value for numbers_per_step needs to be divisible by this number. The
+            maximum local size depends on the gpu capabilities. If no value is provided, OpenCL chooses it automatically
+        --end <max-number>                       The maximum number to calculate to [default: 9223372036854775807]
+    -p, --parallel <num-threads>                 number of used threads [default: 2]
+        --numbers-per-step <numbers-per-step>
+            The amount of numbers that are checked per step. Even numbers are ignored so the Range actually goes to
+            numbers_per_step * 2 [default: 33554432]
+    -o, --output <output-file>                   The output file for the calculated prime numbers [default: primes.txt]
+        --start <start-offset>                   The number to start with [default: 0]
+        --timings-output <timings-file>          The output file for timings [default: timings.csv]
 ```