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| author | Andrew Waterman <andrew@sifive.com> | 2017-01-03 17:45:07 -0800 |
|---|---|---|
| committer | Andrew Waterman <andrew@sifive.com> | 2017-01-03 18:02:42 -0800 |
| commit | 2398dfda399f445cf114e29b61d9331fddb09b4e (patch) | |
| tree | 407c63990049b4fa853aedebb4a20bd5ef5cc333 /FreedomStudio/E31FPGA/performance_counters | |
| parent | b1f048f991e7d743e46be9c48c73d00a843f400c (diff) | |
Improve HiFive1 CPU frequency measurement routine
- Warm up I$ first.
- Correct for integer division truncation error.
- Wait for an RTC clock edge before starting the timing loop,
which removes an error proportional to the number of loop
iterations, allowing us to run for far less time.
Diffstat (limited to 'FreedomStudio/E31FPGA/performance_counters')
0 files changed, 0 insertions, 0 deletions