| commit | ddde171ff735a25fa13077bb28c05101086dc32c | [log] [tgz] |
|---|---|---|
| author | Martin Lueker-Boden <martin.lueker-boden@wdc.com> | Sun Oct 23 14:18:06 2022 -0700 |
| committer | Martin Lueker-Boden <47870387+martin-lueker@users.noreply.github.com> | Mon Oct 31 11:50:31 2022 -0700 |
| tree | bc12c0f1e6888ae6d8a4c56cab335724626f3580 | |
| parent | 233dca28eb21186debc6c232dc4641a3219e2d7e [diff] |
[entropy_src/rtl] Support tight HT thresholds
Adds a new `tight_thresholds_pct` knob to support occasion regressions
with tight HT thresholds. These tighter thresholds are very good for
emulating the behavior of the DUT when operating with RNG streams with
marginal HT quality, as the tighter thesholds will induce infrequent HT
failures. Therefore these thresholds are important for closing behavioral
coverage.
This PR:
- Adds constraints so that only one HT is using tight constraints at
a time, otherwise the frequent failure of multiple alernating tests
will lead to zero passing HT windows.
- Adds new parameters for a second range of tighter thresholds to
use then tight thresholds are endabled.
- Limits the fraction of regressions using this feature.
- Establishes default values for these knobs, and an initial estimate
for the correct value `entropy_src_rng_test` to provide reasonable
coverage.
Signed-off-by: Martin Lueker-Boden <martin.lueker-boden@wdc.com>
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