Well, it's really PAPI 220.127.116.11, but who's counting? A few final last minute fixes caused us to bump the version number, just to keep the source code repository happy.
We added support for PAPI on the Intel Xeon Phi processor, aka MIC or KNC or Knight's Corner. PAPI cross-compiles on the host and runs on the MIC. Note that this currently requires a kernel patch to the MIC kernel. Details can be found in INSTALL.txt.
We also added a new component to measure power usage on MIC cards. This is a native MIC-based component that provides a selection of power, current and voltage measures.
PAPI now supports measuring uncore events on Intel Sandy Bridge processors, which requires support for a new domain: PAPI_DOM_SUPERVISOR to measure events at the system level.
We added a new API, PAPI_get_eventset_component, which returns the component index of a given eventset and is parallel to the PAPI_get_event_component call introduced in PAPI 5.0.
We improved the papi_command_line utility to print output in a variety of formats, and to display event units if they're available.
PAPI 5.0.1 is now available both as a tarball and as a patch to the recent 5.0.0 release. We recommend that all users and tools upgrade to this release.
Why, you may ask, are we releasing again so soon after the 5.0 release?
Primarily because we discovered a bug that randomly causes derived PRESET events to be computed incorrectly. This is a small fix with big implications, and was reported by an early PAPI 5.0 user in our bug reports forum. Thank you for helping to improve our package.
While we were at it, we decided to polish a few other less important things as well:
we updated the libpfm4 library with some Sandy Bridge fixes
we fixed some problems with the build system and external libpfm4 libraries
we fixed some event definitions for Intel Ivy Bridge processors
we updated the CUDA component to support CUDA 5 and Kepler
we added support for RAPL energy measurement on Ivy Bridge
If you've already installed PAPI 5.0.0, you can download a patch here and apply it to your source code and rebuild the library.
If you'd rather install from a tarball you can use the download link below.
PAPI 5.0.0 Release, AKA PAPI-V with support for Virtual Systems
The PAPI 5.0.0 release is now available for download.
This is a major release of PAPI. Parts of both the internal component and external low-level interfaces have changed. This will break your 4.4 compliant components and links to shared libraries.
Although we have tried to keep the impact of these changes minimal, we have made changes to the Application Binary Interface, the Application Programming Interface, and the Component Development Interface. A full detailed description of the changes to PAPI 5.0 can be found here: http://web.eecs.utk.edu/~vweaver1/papers/papi/papi_v5_changes.pdf
Meanwhile here's a quick summary of changed APIs:
PAPI_perror now behaves like its posix cousin. The API has been changed to reflect this.
Both PAPI_perror and PAPI_strerror can now report errors from components as well as pre-defined PAPI errors.
The data returned by PAPI_get_component_info has been cleaned up significantly. If you were using esoteric fields, they may no longer be there.
And some new APIs:
PAPI add named event, PAPI remove named event, PAPI query named event
PAPI get event component, PAPI enum cmp event, PAPI get component index
PAPI disable component by by name, PAPI disable component
PAPI-V also add detection of operation inside a virtual environment and several virtual machine related components, including one to report stealtime from linux.
If you're running on a SandyBridge machine, you can use the new RAPL component to measure power consumed by the chip, and if you're running certain NVidia cards, you can use the NVML component to measure power on that card.
Oh, and if you're using SandyBridge or IvyBridge processors, good luck with counting Floating Point operations. They'll work on SandyBridge if you're careful and only count Floating Point; they won't work at all on IvyBridge.
As always, please contact us through the mailing list or User Forum if you have any questions or complaints about this release.
The PAPI 4.4.0 release is now available for download. The title says it all -- or almost.
This is a major release of PAPI-C. Not because it breaks compatibility with previous versions. It doesn't. But because it adds support for IBM's latest Blue Gene machine, the BG/Q. That may not matter to most of our users, but to those for whom it matters, it matters a lot.
This effort is the product of a three year collaborative development effort between IBM and the performance tools community. They are to be commended for spear-heading this effort to get it right.
You may notice that we bumped the release version from 4.2.1 to 4.4.0. Because we could. And because it helps Cray, another one of our development partners, keep their versioning consistent. You didn't miss 4.3. We just skipped it.
In addition to the new BG/Q support, we have incorporated a handful of bug fixes, code clean-ups and library updates.
And oh, by the way, this is the first release from our git repository. We think we got it right, but let us know if you see any anomalies.
Bug fixes include:
* Fix buffer overrun in lmsensors component * libpfm4: Update to current git libpfm4 snapshot * Fix broken Pentium 4 Prescott support we were missing the netbusrt_p declaration in papi_events.csv * Fix various locking issues in the threaded code. * Fix multiplexing of large eventsets on perf_events systems. This presented when using more than 31 multiplexed events on perf_event
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