| commit | b915a39cd0edbf00ffeebc94ee737c4db0077f3f | [log] [tgz] |
|---|---|---|
| author | Srikrishna Iyer <sriyer@google.com> | Mon Jun 14 16:40:49 2021 -0700 |
| committer | Srikrishna Iyer <46467186+sriyerg@users.noreply.github.com> | Tue Jun 15 21:12:21 2021 -0700 |
| tree | f4a659f9465534492e8aa62564aca9d587382153 | |
| parent | 18d75ceb7bee5e401dba4e9a6536054ac6f05caa [diff] |
[dv, util] Make poll_for_stop() opt-in The `poll_for_stop()` method in `dv_utils_pkg` provides a mechanism to kill the simulation more gracefully on hangs. It looks for the presence of a file called `dv.stop` every 1us in the rundir which the user can 'touch' if it needs to be killed. This mechanism was added because historically, it was not always reliable to kill a sim by hitting `CTRL-C`, especially with waves which would get corrupt on `CTRL-C`. The other reason was to be able to kill a specific sims if they are deemed broken already while allowing others to continue to run. In any case, by allowing that logic by default introduces a pretty big bottleneck - it consumes a whopping 54% of simulation runtime, especially for UART which has periods of idle due to slowness of the baud rate. In this commit, the logic by default is turned off. If this feature is needed, it can be turned on by passing `--run-opts "+poll_for_stop=1"` on the command line. The other change is to increase the polling interval to 10us. Signed-off-by: Srikrishna Iyer <sriyer@google.com>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
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