Red Hat Summit5.2.2.2. Known Problems and Limitiations
OProfile 0.9.9 has a few known problems and limitations. These are:
- AMD Instruction Based Sampling (IBS) is not currently supported with the new
operfprogram. Use the legacyopcontrolcommands for IBS profiling. - The type of the sample header
mtimefield has changed to u64, which makes it impossible to process sample data acquired using previous versions of OProfile. opcontrolfails to allocate the hardware performance counters it needs if the NMI watchdog is enabled. The NMI watchdog, which monitors system interrupts, uses theperftool, which reserves all performance counters.
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