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-rw-r--r--sys/conf/NOTES5
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/conf/NOTES b/sys/conf/NOTES
index 5d26093..27c3380 100644
--- a/sys/conf/NOTES
+++ b/sys/conf/NOTES
@@ -259,6 +259,8 @@ options SX_NOINLINE
# SMP Debugging Options:
#
+# CALLOUT_PROFILING enables rudimentary profiling of the callwheel data
+# structure used as backend in callout(9).
# PREEMPTION allows the threads that are in the kernel to be preempted by
# higher priority [interrupt] threads. It helps with interactivity
# and allows interrupt threads to run sooner rather than waiting.
@@ -297,6 +299,9 @@ options LOCK_PROFILING
options MPROF_BUFFERS="1536"
options MPROF_HASH_SIZE="1543"
+# Profiling for the callout(9) backend.
+options CALLOUT_PROFILING
+
# Profiling for internal hash tables.
options SLEEPQUEUE_PROFILING
options TURNSTILE_PROFILING
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