Merge pull request #38 from sifive/benchmarking

Benchmarking

1 files changed, 47 insertions, 0 deletions

diff --git a/README.md b/README.md
index 58664b0..d0dfc29 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,53 @@ cd freedom-e-sdk
 make help
 ```
 
+### Benchmarking ###
+
+#### Dhrystone ####
+
+After setting up the software and debug toolchains, you can build and
+execute everyone's favorite benchmark as follows:
+
+- Compile the benchmark with the command `make software PROGRAM=dhrystone`.
+- Run on the HiFive1 board with the command `make upload PROGRAM=dhrystone`.
+  This will take a few minutes.  Sample output is provided below.
+- Compute DMIPS by dividing the Dhrystones per Second result by 1757, which
+  was the VAX 11/780's performance.  In the example below, 729927 / 1757 =
+  415 DMIPS.
+- Compute DMIPS/MHz by dividing by the clock rate: in the example below,
+  415 / 260 = 1.60 DMIPS/MHz.
+
+```
+core freq at 259830579 Hz
+
+Dhrystone Benchmark, Version 2.1 (Language: C)
+
+<snip>
+
+Microseconds for one run through Dhrystone: 1.3
+Dhrystones per Second:                      729927.0
+```
+
+#### CoreMark ####
+
+We cannot distribute the CoreMark benchmark, but following are instructions
+to download and run the benchmark on the HiFive1 board:
+
+- Download CoreMark from EEMBC's web site and extract the archive from
+  http://www.eembc.org/coremark/download.php.
+- Copy the following files from the extracted archive into the
+  `software/coremark` directory in this repository:
+  - `core_list_join.c`
+  - `core_main.c`
+  - `coremark.h`
+  - `core_matrix.c`
+  - `core_state.c`
+  - `core_util.c`
+- Compile the benchmark with the command `make software PROGRAM=coremark`.
+- Run on the HiFive1 board with the command `make upload PROGRAM=coremark`.
+- Divide the reported Iterations/Sec by the reported core frequency in MHz to
+  obtain a CoreMarks/MHz value.
+
 ### For More Information ###
 
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