diff options
| author | Sven Schnelle <svens@linux.ibm.com> | 2026-05-21 12:41:44 +0200 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2026-05-26 08:15:41 +0200 |
| commit | 29eb8a7b6e3bfca74a9077304b08d42274cbb4d6 (patch) | |
| tree | 69710ce8960898ecd1a56499830e30347086e55d /Documentation/trace | |
| parent | 30cc5e2ad826a6d2308acdec3b462c1a6497b7b7 (diff) | |
| download | lwn-29eb8a7b6e3bfca74a9077304b08d42274cbb4d6.tar.gz lwn-29eb8a7b6e3bfca74a9077304b08d42274cbb4d6.zip | |
s390/tracing: Add s390-tod clock
In order to allow comparing trace timestamps between different
systems or virtual machines on s390, add a s390-tod trace clock.
This clock just uses the returned TOD clock value from stcke
directly.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'Documentation/trace')
| -rw-r--r-- | Documentation/trace/ftrace.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/trace/ftrace.rst b/Documentation/trace/ftrace.rst index b9efb148a5c2..f4d3f4d35ed5 100644 --- a/Documentation/trace/ftrace.rst +++ b/Documentation/trace/ftrace.rst @@ -570,6 +570,10 @@ of ftrace. Here is a list of some of the key files: to correlate events across hypervisor/guest if tb_offset is known. + s390-tod: + This uses the s390 TOD clock value. This clock is usually in + sync across virtual machines and STP-enabled machines. + mono: This uses the fast monotonic clock (CLOCK_MONOTONIC) which is monotonic and is subject to NTP rate adjustments. |