| commit | 206721ccd97446e9fc9a23e52c1c1dedb240b664 | [log] [tgz] |
|---|---|---|
| author | Srikrishna Iyer <sriyer@google.com> | Thu Apr 15 15:23:08 2021 -0700 |
| committer | Srikrishna Iyer <46467186+sriyerg@users.noreply.github.com> | Tue Apr 20 10:11:43 2021 -0700 |
| tree | 9a46f944ad687f07ca094e214e5b953bef52954e | |
| parent | 956b3f8f31ef371f3c0b309f13dec121452b7060 [diff] |
[dvsim] Scheduler updates - max_parallel, max_poll The max_parallel setting previously was a Scheduler class variable. It has now been moved to the Launcher class, since each launcher variant has different needs. Likewise, 2 new features are added - `max_poll` and `poll_freq`. By default, the max_poll 10K, and the polling frequency is 1 second. The purpose of adding these knobs is to reduce the polling rate and the number of jobs polled at a given time. With external launchers such as LSF and cloud, polling for a job completion could involve multiple steps and some external command invocations that are time-consuming. These features help limit the time taken by the Scheduler to poll the entire set of jobs. If we do not provide a way to fine-tune / adjust these parameters, DVSim will appear to have hung (or worse, it could crash the system). The max_poll needs to cycle through the list of running jobs, rather than just the first N ones. For example, if there are 5 jobs running [a, b, c, d, e], and max_poll is set to 2, on the first poll window, it polls for jobs a and b to complete. Then it polls b and c, followed by e and a and so on. To allow this to happen, the list of running jobs now needs to be maintained as a circular linked list, that supports iterating through the list, while allowing jobs to be added or removed from the list in realtime. This is achieved in the newly added `CircularList` class. 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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