Release Notes: Default support for libpfm4. PERF_COUNT_SW software events are available under perf_events with libpfm4. Nehalem/Westmere/SandyBridge event support is ready, but support is not yet available in the Linux kernel. A new utility to display PAPI error codes and description strings. Support for handling multi-attach properly. The CUDA component is now thread-safe. Multiple CPU threads can access the same CUDA context. A lot of code cleanup. Support for AMD Bobcat, Intel SandyBridge, and ARM Cortex-A8 and Cortex-A9. Many bugfixes.
Release Notes: Support was added for the PCL (Performance Counters for Linux) interface. Support was added for the IBM Blue Gene P, Intel Nehalem EX and Westmere, Intel Core i7, Intel Atom, AMD Opteron Barcelona, Shanghai, Istanbul event table support, POWER7 w/ Linux, and Sun Niagara2. Windows and UltraSPARC support was reintroduced. Components for FreeBSD were updated to support newer processors. Support for Intel CoreDuo was fixed. Building of shared and static libraries independently was added. Experimental Lustre and Infiniband components were added. Many bugfixes and minor enhancements were made.