tools/offwaketime: Add raw tracepoint support to reduce overhead #5424
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This patch adds support for raw tracepoints in offwaketime tool to reduce overhead compared to kprobes. Raw tracepoints have lower overhead because they don't require function entry/exit instrumentation. The implementation: - Adds RAW_TRACEPOINT_PROBE handlers for sched_switch and sched_wakeup - Creates kprobe wrapper functions for backward compatibility - Automatically selects raw tracepoints when supported, falls back to kprobes otherwise - Refactors oncpu() function to accept both prev and next task_struct parameters for raw tracepoint compatibility This follows the same pattern used in other BCC tools like wakeuptime.py and runqlat.py. Signed-off-by: Jack Zhao <[email protected]>
JackZhao166
requested review from
brendangregg,
chenhengqi,
ekyooo and
yonghong-song
as code owners
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This patch adds support for raw tracepoints in offwaketime tool to reduce overhead compared to kprobes. Raw tracepoints have lower overhead because they don't require function entry/exit instrumentation.
The implementation:
This follows the same pattern used in other BCC tools like wakeuptime.py and runqlat.py.