Current PAPI Software and Patches
Announcing PAPI 5.4.0
Just in time for SuperComputing 2014, PAPI 5.4.0 is now available.
This release provides a new component for the high speed power measurement API for IBM Blue Gene/Q (BG/Q), called EMON, to provide access to power and energy data on BG/Q in a transparent fashion. This additional support complements the earlier BGPM components for BG/Q, and enables PAPI users and tool developers to use their PAPI instrumented code as is without having to learn a new set of library and instrumentation primitives.
We have added initial support for Applied Micro X-Gene architecture, RAPL (energy measurement) support for Intel Haswell models, and support for the IBM POWER8 system when run as a non-virtualized platform 'PowerNV'. Furthermore, we have extended the RAPL energy measurements via msr-safe, which is a linux kernel module that allows user access to a whitelisted set of MSRs.
This release also includes several enhancements for the perf_event (core/uncore) components, including support for extended event masks which adds a number of new masks that for example enable counting in user domain, kernel domain, or on a specific cpu.
Additionally, there are also changes to the papi_component_avail utility which now provides a list of PMU names supported by active components.The papi_native_avail utility now supports a more robust "--validate" check on systems with events that require multiple masks to be provided in order to be a valid event (e.g., on Intel SandyBridge EP).
There have been several other bug fixes and enhancements:
- Updated IBM POWER7, POWER8 presets
- Hardware counter and event count added/fixed for BGPM components
- Reduced overhead of API call PAPI_name_to_code()
- Growing list of native events in core/uncore components fixed
- Cleaned up Intel IvyBridge presets
As always, there are more details on these changes in the file ChangeLogP540.txt inside the PAPI tarball.
Announcing PAPI 5.3.2
PAPI 5.3.2 is now available. This is a minor release featuring several enhancements and bug fixes.
There are a host of component updates to mention:
- NVML component updates;
- Addressed appio memory leaks;
- Support for Haswell-EP added to RAPL component;
- The perf_event_uncore component event enumeration works now;
- All components now have appropriate domain and granularities.
The PAPI team also added support for the Intel Silvermont processor and the Qualcomm Krait. FreeBSD support has also been revamped for FreeBSD 10. Some test codes now fall back to PAPI_TOT_INS if PAPI_FP_INS is not defined. Intel Haswell presets have been refined. x87 instructions were added to the PAPI_FP_INS preset on Intel Sandy/Ivy-Bridge processors.
Announcing PAPI 5.3.0
Just in time for Christmas stocking-stuffers (and too late for SuperComputing), PAPI 5.3 is now available.
This release includes several enhancements for Intel MIC (Xeon Phi) architectures, including support for offload code in addition to the previously released support for native code. See INSTALL.TXT for details. In addition to offload support, we've enhanced support for host-side power reading from MIC and added a utility to aid in plotting the results.
Intel finally admitted that Ivy Bridge supports Floating Point measurement at least as well as Sandy Bridge and added Floating Point events to the official event table. PAPI 5.3 supports them too. See the PAPI topic: Counting Floating Point on Sandy Bridge and Ivy Bridge for details.
The linux-rapl component had a problem with dynamic range. The length of time you could measure was a function of the (random) starting value. This component has been rewritten to insure access to the full 32-bits of dynamic range, and a test, rapl_wraparound, has been provided to estimate how long you can measure a naive gemm. The cautionary note is that you no longer get an error message on overflow, so you need to check your timings and results for reasonableness. See the PAPI topic: Accessing RAPL for more details.
We made some major changes in the way we handle ctests. First, many of the ctests were built based on outdated configure switches in the makefile(s). We rewrote the tests to determine at runtime whether or not they can run. This may result in more tests executing on your systems than in the past. Enjoy! Next, recognizing the value of our test suite as example code, we restructured the way make install-all works. This option now creates location independent makefiles that will allow you to clone your own copy of the tests directory and modify these tests for your own purposes.
There have been several other bug fixes and enhancements:
- the Intel Haswell event table now supports PAPI_L1_ICM
- AMD Bulldozer now supports Core select masks
- the CUDA component now properly reports the number of native events
- the command_line utility no longer skips the last event on a list
- icc builds no longer add an extraneous -openmp flag
Source Code Repository
If you would like to interactively browse the PAPI source code, go to the Web based source browser here:
This source browser is also accessible through the Trac bug reporting system or directly through the Browse Source link in the menu to the left.
You can also stay up to date directly by cloning a copy of our git Source Code Repository
Make sure git is installed on your machine. You can download a copy here.
Download the PAPI repository the first time with the following command:
> git clone https://icl.cs.utk.edu/git/papi.git
This creates a complete copy of the papi git repository on your computer in a folder called 'papi'.
To make sure your copy is up to date with the repository:
> cd papi
> git pull https://icl.cs.utk.edu/git/papi.git
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