=============================================================================== PAPI 4.0.0 RELEASE NOTES 19 Jan 2010 =============================================================================== This file documents changes in recent PAPI releases in inverse chronological order. For details on installing PAPI on your machine, consult the INSTALL.txt file in this directory. For specific and detailed information on changes made in this release, grep the ChangeLogP400.txt file for keywords of interest or go directly to the PAPI cvs tree. GENERAL NOTES =============================================================================== This is the inaugural release of Component PAPI, or PAPI-C. It represents a significant architectural change from PAPI 3.7.x and earlier. As such, your application must be recompiled and relinked to libpapi, the PAPI library for this version to work. PAPI-C is backward compatible with earlier versions of PAPI. All new library features are supported through new APIs and all old APIs still work as expected. Applications instrumented for PAPI should continue to work as expected with no changes. The major change in PAPI-C is the support of multiple components, or counting domains, in addition to the traditional hardware counters found in the cpu. The goal of this first release of PAPI-C is to provide a stable technology platform within which to explore the development and implementation of additional components. Although a small number of components are provided with this release, the major objective has been to guarantee that PAPI-C works at least as well as earlier PAPI releases and on the same range of hardware platforms. We think we have achieved that goal. Visit the PAPI Reference pages for more information at: http://icl.cs.utk.edu/projects/papi/wiki/Main_Page And visit the PAPI website for the latest updates: http://icl.cs.utk.edu/papi/ CHANGES IN PAPI 4.0.0 SINCE PAPI 3.7.2 =============================================================================== Bug Fixes: ---------- Enhancements: ------------- - The perf_events linux kernel interface is supported for POWER and x86 in linux kernels 2.6.31 and above. - PAPI info now includes information on multicore heirarchy. This is reported in the header of many tests. New Platforms: ------------- - IBM Blue Gene P has been fully integrated into the code base. It still suffers the same quirks and limitations as the earlier pre-release. Open Issues: ------------- - Components are invoked from the configure line; Requires PAPI source code modifications to add new components. Experimental: ------------- Known Bugs: ----------- - some tests involving overflow and profiling fail with linux perf_events - multiple event overflow only works for last event enabled on (at least) Intel Core2 and Itanium architectures. - clock speeds on variable speed Intel systems can be misreported, leading to incorrect calculations of mflops - memory leaks may lead to (rare) seg faults on Pentium4 systems =============================================================================== PAPI 3.7.2 RELEASE NOTES 02 Dec 2009 =============================================================================== This file documents changes in recent PAPI releases in inverse chronological order. For details on installing PAPI on your machine, consult the INSTALL.txt file in this directory. For specific and detailed information on changes made in this release, grep the ChangeLogP372.txt file for keywords of interest or go directly to the PAPI cvs tree. GENERAL NOTES =============================================================================== This release is an incremental upgrade to PAPI 3.7.1. It fixes a mistake in the 3.7.1 release by updating configure to better detect the proper counter interface in linux kernels. Along the way, it also cleans up a few issues found in the 3.7.1 release. As always, if you identify strange behavior or reproducible bugs, please contact the PAPI team or visit the PAPI User Forum. And visit the PAPI website for the latest updates: http://icl.cs.utk.edu/papi/ CHANGES IN PAPI 3.7.2 SINCE PAPI 3.7.1 =============================================================================== Bug Fixes: ---------- - fixed L3 cache size reporting for AMD Family 10h processors - fixed std deviation underflow in sdsc2 and sdsc4 tests - fixed bug in counter assignment for FreeBSD Atom implementation Enhancements: ------------- - updated cache tables for Intel Nehalem i7 processors - configure provides better autodetection of 2.6.31 or 2.6.32 kernels and perf_counter interface (in most cases) - configure provides better detection and autoselection of perfctr or perfmon drivers for linux - configure and sources have been modified to support perf_counter on kernel 2.6.31 and perf_event on kernel 2.6.32 - a papi.spec file has been added to simplify creation of rpms =============================================================================== PAPI 3.7.1 RELEASE NOTES 13 Nov 2009 =============================================================================== This file documents changes in recent PAPI releases in inverse chronological order. For details on installing PAPI on your machine, consult the INSTALL.txt file in this directory. For specific and detailed information on changes made in this release, grep the ChangeLogP371.txt file for keywords of interest or go directly to the PAPI cvs tree. GENERAL NOTES =============================================================================== This release is an incremental upgrade to PAPI 3.7.0. It cleans up several issues found in the 3.7.0 release and provides better support for the perf_counter interface introduced in Linux kernel 2.6.31. As always, if you identify strange behavior or reproducible bugs, please contact the PAPI team or visit the PAPI User Forum. And visit the PAPI website for the latest updates: http://icl.cs.utk.edu/papi/ NOTE: If you are looking for the man pages and other user documentation, look online. We decided we could provide better and more timely support by maintaining just the online documentation. Let us know if you think this is a bad decision. CHANGES IN PAPI 3.7.1 SINCE PAPI 3.7.0 =============================================================================== Bug Fixes: ---------- - fixed long standing subtle multiplexing bug in which TIDs and PIDs would get confused. TIDs would then get lost leading to long term instability. - fixed unit mask handling in perf_counters - fixed uninitialized string issue in /proc/cpuinfo parsing - fixed event reporting errors for various Opteron Family 10h models Enhancements: ------------- - FreeBSD support for Intel i7 - cleaned up libpapi.so naming for RedHat rpms - cleaned up various other issues for rpms per RedHat - autodetection of 2.6.31 perf_counter interface (in most cases) - enhanced packaging options in configure to support building either static or shared libraries independently New Platforms: ------------- - Support for the perf_counters (PCL: Performance Counters for Linux) interface for Linux kernel 2.6.31 and later has been more completely tested on a broader range of platforms, including Opteron, Core2, i7, and POWER. It successfully performs basic counting operations and handles many multiplex, overflow and profiling situations. It is still not as extensivelytested as the perfmon or perfctr interfaces, but is ready for work. Caveat Emptor. Major Issues: ------------- - see 3.7.0 Experimental: ------------- Known Bugs: ----------- - see 3.7.0 =============================================================================== PAPI 3.7.0 RELEASE NOTES 08 Sep 2009 =============================================================================== This file documents changes in recent PAPI releases in inverse chronological order. For details on installing PAPI on your machine, consult the INSTALL.txt file in this directory. For specific and detailed information on changes made in this release, grep the ChangeLogP370.txt file for keywords of interest or go directly to the PAPI cvs tree. GENERAL NOTES =============================================================================== This release is a recommended upgrade to PAPI 3.6.x. It addresses a number of open issues and introduces support for several new platforms, including Intel Nehalem (Core i7), Atom, POWER7 and Niagara2. If you are currently using PAPI 3.6.x or earlier, it is recommended that you upgrade to this version. As always, if you identify strange behavior or reproducible bugs, please contact the PAPI team or the PAPI User Forum. And visit the PAPI website for the latest updates: http://icl.cs.utk.edu/papi/ NOTE: If you are looking for the man pages and other user documentation, look online. We decided we could provide better and more timely support by maintaining just the online documentation. Let us know if you think this is a bad decision. CHANGES IN PAPI 3.7.0 SINCE PAPI 3.6.2 =============================================================================== Bug Fixes: ---------- - many minor bugs fixed in tests and in specific cpu components - fixed support for Intel CoreDuo (not Core2) broken in PAPI 3.6.x - fixed library init failure on AIX Power6 when executable names > 32 char long - fixed avail.F construct that was crashing some versions of gfortran Enhancements: ------------- - A new utility has been added: papi_version - Added 4 new PRESET events to better handle SIMD instructions on Intel cpus: PAPI_DP_OPS - counts double precision scalar and vector FP operations PAPI_SP_OPS - counts single precision scalar and vector FP operations PAPI_VEC_DP - counts double precision vector instructions PAPI_VEC_SP - counts single precision vector instructions - FreeBSD support upgrade and new support for Atom and Intel Core2 New Platforms: ------------- - Intel Core i7 (Nehalem) support for 7 core counters; no support for Uncore counters - Intel Atom - AMD Opteron Barcelona, Shanghai, Istanbul event table support - POWER7 support for Linux thanks to IBM - Sun Niagara2 support thanks to Aachen University, Germany - Resurrected support for PAPI on Windows; now supports Intel Core2 and Core i7 Major Issues: ------------- - PAPI for Windows does not support 64-bit versions due to compiler issues. Experimental: ------------- - Support for the perf_counters (PCL: Performance Counters for Linux) interface is available as a technology pre-release for Linux kernel 2.6.31 and later. This has been tested on IBM POWER and Intel Core2 and successfully performs basic counting operations. It has not been stress tested. Caveat Emptor. Known Bugs: ----------- - clock speeds are occasionally not reported correctly for systems with SpeedStep technology. - Intel Atom crashes on a small number of standard tests. =============================================================================== PAPI 3.6.2 RELEASE NOTES 03 Oct 2008 NOTE: For releases prior to PAPI 3.7.0, please reference the tarball for an earlier release, or use the on-line cvs viewer at: http://icl.cs.utk.edu/viewcvs/viewcvs.cgi/PAPI/papi/ to see earlier versions of this file. ===============================================================================
