5.2.2.2. 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 operf program. Use the legacy opcontrol commands for IBS profiling.
The type of the sample header mtime field has changed to u64, which makes it impossible to process sample data acquired using previous versions of OProfile.
opcontrol fails to allocate the hardware performance counters it needs if the NMI watchdog is enabled. The NMI watchdog, which monitors system interrupts, uses the perf tool, which reserves all performance counters.

通过我们的产品和服务，以及可以信赖的内容，帮助红帽用户创新并实现他们的目标。

红帽致力于替换我们的代码、文档和 Web 属性中存在问题的语言。欲了解更多详情，请参阅红帽博客.

我们提供强化的解决方案，使企业能够更轻松地跨平台和环境（从核心数据中心到网络边缘）工作。