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| author | Matthew Brost <matthew.brost@intel.com> | 2026-09-25 13:15:25 -0700 |
|---|---|---|
| committer | Matthew Brost <matthew.brost@intel.com> | 2026-09-25 17:18:13 -0700 |
| commit | cb85dddfeedf72c24a930739d2df7c64ccb84e53 (patch) | |
| tree | ab6bb79d9e3779bdf1f428867985fc017f4dfa7d /tools/perf/scripts/python/bin/stackcollapse-record | |
| parent | 085d8f468f4943cae4dbe881fef287dbd2e7f805 (diff) | |
| download | linux-cb85dddfeedf72c24a930739d2df7c64ccb84e53.tar.gz linux-cb85dddfeedf72c24a930739d2df7c64ccb84e53.zip | |
drm/xe: add migrate ULLS period configfs attribute
Add a configfs attribute to control the migrate ULLS period.
The migrate ULLS period specifies how long, in milliseconds, migrate
ULLS remains active before exiting. Migrate ULLS is currently used by
page-fault handling and SVM prefetch operations to process migration
work through a continuously running batch.
The attribute defaults to 5 ms. Setting the value to 0 disables ULLS.
This knob is primarily intended for performance tuning and evaluation,
allowing experimentation with the trade-off between reducing ULLS
startup/teardown overhead and limiting the time spent in a continuously
running migration workload.
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Maarten Lankhorst <dev@lankhorst.se>
Link: https://patch.msgid.link/20260925201526.1355279-24-matthew.brost@intel.com
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