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| author | jhb <jhb@FreeBSD.org> | 2000-09-21 06:50:02 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2000-09-21 06:50:02 +0000 |
| commit | 5b97c1ba6513d84b8e072c64d729a6c4acc490d4 (patch) | |
| tree | 2de9edc6f5c93170c10a3105e7cd583aec5a9f6f | |
| parent | 2e74df8cf9d7a838a52f79054094b3d8746ee86a (diff) | |
| download | FreeBSD-src-5b97c1ba6513d84b8e072c64d729a6c4acc490d4.zip FreeBSD-src-5b97c1ba6513d84b8e072c64d729a6c4acc490d4.tar.gz | |
Add in documentation and examples of the KTR kernel config options.
Prompted by: phk's kernel include script
| -rw-r--r-- | sys/conf/NOTES | 19 | ||||
| -rw-r--r-- | sys/i386/conf/NOTES | 19 |
2 files changed, 38 insertions, 0 deletions
diff --git a/sys/conf/NOTES b/sys/conf/NOTES index 5c812dc..813845a 100644 --- a/sys/conf/NOTES +++ b/sys/conf/NOTES @@ -322,6 +322,25 @@ options GDB_REMOTE_CHAT options KTRACE #kernel tracing # +# KTR is a kernel tracing mechanism imported from BSD/OS. Currently it +# has no userland interface aside from a few sysctl's. It is enabled with +# the KTR option. The KTR_EXTEND option causes trace events to be generated +# as a string from snprintf rather than as a string and up to 5 argument +# pointers. KTR_ENTRIES defines the number of entries in the circular trace +# buffer. KTR_COMPILE defines the mask of events to compile into the kernel +# as defined by the KTR_* constants in <sys/ktr.h>. KTR_MASK defines the +# initial value of the ktr_mask variable which determines at runtime what +# events to trace. KTR_CPUMASK determines which CPU's log events, with +# bit X corresponding to cpu X. +# +options KTR +options KTR_EXTEND +options KTR_ENTRIES=1024 +options KTR_COMPILE=0x3fffff +options KTR_MASK=0x201208 +options KTR_CPUMASK=0x3 + +# # The INVARIANTS option is used in a number of source files to enable # extra sanity checking of internal structures. This support is not # enabled by default because of the extra time it would take to check diff --git a/sys/i386/conf/NOTES b/sys/i386/conf/NOTES index 5c812dc..813845a 100644 --- a/sys/i386/conf/NOTES +++ b/sys/i386/conf/NOTES @@ -322,6 +322,25 @@ options GDB_REMOTE_CHAT options KTRACE #kernel tracing # +# KTR is a kernel tracing mechanism imported from BSD/OS. Currently it +# has no userland interface aside from a few sysctl's. It is enabled with +# the KTR option. The KTR_EXTEND option causes trace events to be generated +# as a string from snprintf rather than as a string and up to 5 argument +# pointers. KTR_ENTRIES defines the number of entries in the circular trace +# buffer. KTR_COMPILE defines the mask of events to compile into the kernel +# as defined by the KTR_* constants in <sys/ktr.h>. KTR_MASK defines the +# initial value of the ktr_mask variable which determines at runtime what +# events to trace. KTR_CPUMASK determines which CPU's log events, with +# bit X corresponding to cpu X. +# +options KTR +options KTR_EXTEND +options KTR_ENTRIES=1024 +options KTR_COMPILE=0x3fffff +options KTR_MASK=0x201208 +options KTR_CPUMASK=0x3 + +# # The INVARIANTS option is used in a number of source files to enable # extra sanity checking of internal structures. This support is not # enabled by default because of the extra time it would take to check |
