app: perf_overlay: add note on CONFIG_DMA_INTEL_ADSP_HDA_TIMING_L1_EXIT

On many Intel platforms, the HD-DMA interrupts can interfere with component level performance measurements. Add a comment how to disable the interrupts when doing component performance analysis. Signed-off-by: Kai Vehmanen <[email protected]>
thesofproject · Nov 19, 2024 · cc4a331 · cc4a331
1 parent 9f195f0
commit cc4a331
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/app/perf_overlay.conf b/app/perf_overlay.conf
@@ -8,3 +8,9 @@ CONFIG_ADSP_IDLE_CLOCK_GATING=n
 CONFIG_KCPS_DYNAMIC_CLOCK_CONTROL=n
 # disable top-level statistics to reduce logging overhead
 CONFIG_SCHEDULE_LL_STATS_LOG=n
+
+# vendor/target dependent options
+#
+# uncomment to disable Intel HD-DMA L1 exit ISR. this affects
+# the peak execution times at component level
+#CONFIG_DMA_INTEL_ADSP_HDA_TIMING_L1_EXIT=n