OProfile is a low-overhead, transparent profiler for Linux. It is capable of instruction-grain profiling of all processes, shared libraries, the kernel, and device drivers, via the hardware performance counters.
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A new "operf" program is now available which allows non-root users to profile single processes. "operf" can also be used for system-wide profiling, but root authority is required. This capability requires a kernel version of 2.6.31 or greater. This release supports the processors Tilera tile64, Tilera tilepro, Tilera tile-gx, IBM System z10, IBM System z196, Intel Ivy Bridge, ARMv7 Cortex-A5, ARMv7 Cortex-A15, and ARMv7 Cortex-A7.
This is strictly a bugfix release. Its main purpose is to fix three regression bugs that occurred in 0.9.5: bug #2845063 (opcontrol could not start daemon in timer mode); improper handling of separate debuginfo files; and XML callgraph output had no symbol-level sample counts. Several other minor bugfixes and updates were made.
This release includes support for several new processor models: ARMv7, AMD family11h, IBM POWER7, Intel Atom, Intel Core i7, and Xeon 55xx (based on Nehalem core). Many other features and bugfixes are included as well. This release also includes a framework for extending the sample data files. Support for AMD Instruction Based Sampling (IBS) has been added, using the new extended feature framework. Additionally, this release supports architected events for for Intel ("arch perfmon") and IBM POWER ("compatibility events").
This release has many new features and fixes. The
biggest change with this release is the addition
of support for profiling JITed code. Java agents
that support Java 1.4 (JVMPI) and later (JVMTI)
are included with OProfile.
