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RELEASENOTES.txt
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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.
===============================================================================
PAPI 5.5.1 RELEASE NOTES 18 Nov 2016
===============================================================================
PAPI 5.5.1 is now available. This is a point release intended
primarily to add support for uncore performance monitoring events on
Intel Xeon Phi Knights Landing (KNL). Other minor bugfixes have also
been made.
For specific and detailed information on changes made in this release,
see ChangeLogP551.txt for keywords of interest or go directly to the
PAPI git repository.
New Platforms:
* Added Knights Landing (KNL) uncore event support via libpfm4.
Bug Fixes:
* Fix some possible string termination problems.
* Cleanup lustre and mx components.
* Enable RAPL for Broadwell-EP.
===============================================================================
PAPI 5.5.0 RELEASE NOTES 14 Sep 2016
===============================================================================
PAPI 5.5 is now available. This release provide a new component that
provides read and write access to the information and controls exposed
via the Linux powercap interface.The PAPI powercap component supports
measuring and capping power usage on recent Intel architectures.[a][b]
We have added core support for Knights Landing (uncore support will be
released later) as well as power monitoring via the RAPL and powercap
components.
For specific and detailed information on changes made in this release,
see ChangeLogP550.txt for keywords of interest or go directly to the
PAPI git repo.
New Platforms:
* Added Knights Landing (KNL) core events and preset events.
* Added Intel Broadwell/Skylake/Knights Landing RAPL support
* Updated PAPI preset event support for Intel Broadwell/Skylake
New Component:
* Powercap component: PAPI now supports the Linux Power Capping
Framework which exposes power capping devices and power measurement
to user space via a sysfs virtual file system interface.
Enhancements:
* Add support for multiple flavors of POWER8 processors.
* Force all processors to check event schedulability by checking that
PAPI can successfully read the counters.
* Support for Intel Broadwell-EP, Skylake, Goldmont, Haswell-EP
inherited from libpfm4.
* Shared memory object (.so) naming is made more limited so that minor
updates do not break ABI compatibility.
Bug Fixes:
* Improve testlib error messages if a component fails to initialize.
* Fix _papi_hwi_postfix_calc parsing and robustness.
* Clean build rules for CUDA sampling subcomponent.
* Correct IBM Power7 and Power8 computation of PAPI_L1_DCA.
* Eliminate the sole use of ftests_skip subroutine.
* Correct the event string names for tenth.c.
* Have Fortran test support code report errors more clearly.
* Cleanup output from libmsr component.
* PAPI internal functions were marked as static to avoid exposing them
externally.
* Multiple component were fixed to make internal functions static
where possible, to avoid exposing the functions as externally
accessible entry points.
* CUDA component configuration bug fixed.
===============================================================================
PAPI 5.4.3 RELEASE NOTES 26 Jan 2016
===============================================================================
For specific and detailed information on changes made in this release, grep
ChangeLogP543.txt for keywords of interest or go directly to the PAPI git
repo.
GENERAL NOTES
===============================================================================
New Implementations:
-------------------
* libmsr component: Using LLNL's libmsr library to access Intel
RAPL (Running Average Power Limit) library adds power capping
abilities to PAPI.
* CUDA PC sampling: A new standalone CUDA sampling tool
(papi_cuda_sampling) has been added to the CUDA component
(components/cuda/sampling/) and can be used as a preloader to
perform PC sampling on Nvidia GPUs which support the CUPTI
sampling interface (e.g. Maxwell).
* ARM Cortex A53 support: Event definitions added.
Enhancements:
------------
* Added Haswell-EP uncore support
* Initial Broadwell, Skylake support
* Added a general CUDA example (components/cuda/test) that uses
LD_PRELOAD to attach to a running CUcontext.
* Added "-check" flag to papi_avail and papi_native_avail to
test counter availability/validity.
Bug Fixes:
----------
* Clean output from papi_avail tool when there are no user defined events.
* Support PAPI_GRN_SYS granularity for perf component.
* Bug fix for infiniband_umad component.
* Bug fix for vmware component.
* Bug fix for NVML component.
* Fixed RAPL component so it reports unsupported inside a guest VM.
* Cleanup ARM CPU detection.
* Bug fix for PAPI_overflow issue for multiple eventsets.
* Increased PERF_EVENT_MAX_MPX_COUNTERS to 192 from 128.
* Fixed memory leak in papi_preset.c.
* Free allocated memory in the stealtime component.
===============================================================================
PAPI 5.4.1 RELEASE NOTES 02 Mar 2015
===============================================================================
For specific and detailed information on changes made in this release, grep
ChangeLogP541.txt for keywords of interest or go directly to the PAPI git
repo.
GENERAL NOTES
===============================================================================
The PAPI CUDA component is updated to support CUDA 6.5 with multiple GPUs.
New Platforms:
-------------
* Updated support for Intel Haswell and Haswell-EP
* Added ARM Cortex A7
* Added ARM 1176 cpu (original Raspberry Pi)
Enhancements:
------------
* Enhance PAPI preset events to allow user defined events.
* User defined events are set up via a user event definition file.
* CUDA component is updated to support multiple devices and contexts.
* Tested under and supports CUDA 6.5.
* Note: Events for different CUDA context MUST be added from within the context.
* New test demonstrating attaching an eventset to a single CPU rather than a thread.
* Use the term "event qualifiers" instead of "event masks" to clarify understanding.
* Added pkg-config support to PAPI.
Bug Fixes:
----------
* Fixed lustre segfault bug.
* Fixed compilation in the absence of a Fortran compiler.
* Fixed bug in krental_pthreads ctest to join threads properly on exit.
* Fixed bug in perf_events where event masks were not getting cleared properly.
* Fixed memory leak bug in perf_events.
===============================================================================
PAPI 5.4.0 RELEASE NOTES 13 Nov 2014
===============================================================================
For specific and detailed information on changes made in this release, grep
ChangeLogP540.txt for keywords of interest or go directly to the PAPI git
repo.
GENERAL NOTES
===============================================================================
Full support for CUDA 6.5 has been delayed and will be included in the next
release.
New Platforms:
-------------
* EMON power component for IBM Blue Gene/Q
* Support for the Applied Micro X-Gene processor
* Support for IBM POWER non-virtualized platform
* RAPL support for Intel Haswell models (60,69,71)
Enhancements:
------------
* Added list of supported PMU names (core/uncore components)
* Support for extended event masks (core/uncore components)
* Extension of the RAPL energy measurements on Intel via msr-safe
* Updated IBM POWER7, POWER8 presets
* 'papi_native_avail --validate' supports events that require
multiple masks to be valid
Bug Fixes:
----------
* HW counter and event count added/fixed for BGPM components
* Reduce cost of using PAPI_name_to_code
* Non-null terminated strings fixed
* Growing list of native events in core/uncore components fixed
* Cleaned up Intel IvyBridge presets
* Addressed Coverity reported issues
===============================================================================
PAPI 5.3.2 RELEASE NOTES 30 Jun 2014
===============================================================================
For specific and detailed information on changes made in this release, grep
ChangeLogP532.txt for keywords of interest or go directly to the PAPI git
repo.
GENERAL NOTES
===============================================================================
An internal 5.3.1 is skipped, changes since 5.3 are detailed below.
New Platforms:
-------------
* Intel Silvermont
* ARM Qualcomm Krait
Enhancements:
------------
* Rapl component support for Intel Haswell-EP
* Add units to NVML component
* Refine the definition of a Flop on the *-Bridge Intel chips.
* Updated Intel Haswell presets
Bug Fixes:
----------
* FreeBSD build and component fixes
* Uncore enumeration
* Printf format specifiers standardized (use # for hex)
===============================================================================
PAPI 5.3.0 RELEASE NOTES 18 Nov 2013
===============================================================================
For specific and detailed information on changes made in this release, grep
ChangeLogP530.txt for keywords of interest or go directly to the PAPI git
repo.
GENERAL NOTES
===============================================================================
New Platforms:
-------------
* Intel Xeon Phi ( for offload code )
Enhancements:
------------
* RAPL component better deals with counter wrap
* Floating support added for Intel IvyBridge
* PAPI_L1_ICM event added for Intel Haswell
* AMD Fam15h gets Core select umasks
* CUDA component now sets the number of native events supported
* Installed tests' code can now be built.
* host-micpower utility
Bug Fixes:
----------
* command_line utility event skipping bug
* remove extranious -openmp flag from icc builds
* Default to building all ctests, clean up much bit rot
===============================================================================
PAPI 5.2.0 RELEASE NOTES 06 Aug 2013
===============================================================================
For specific and detailed information on changes made in this release, grep
ChangeLogP520.txt for keywords of interest or go directly to the PAPI git
repo.
GENERAL NOTES
===============================================================================
This release represents a major overhaul of several components. Support for
Intel Haswell and Power 8 has been added. Processor support code has been
moved to the components directory.
New Platform:
-------------
* Intel Haswell (initial support)
* Power 8 (initial support)
New Components:
---------------
* Host-side MIC power component
Enhancements:
------------
* Component tests are now included with install-tests make target.
* Components with external library dependencies load them at runtime
allowing better distribution (infiniband, cuda, vmware, nvml and
host-side micpower)
* Perf_events, perfctr[_ppc] and perfmon2[_ia64] have been moved under the
components directory
* (Intel) Uncore support has been split into its own component
* Lustre component better handles large numbers of filesystems
===============================================================================
PAPI 5.1.1 RELEASE NOTES 21 May 2013
===============================================================================
For specific and detailed information on changes made in this release, grep
ChangeLogP511.txt for keywords of interest or go directly to the PAPI git
repo.
GENERAL NOTES
===============================================================================
This is a bug fix release.
New Platform:
-------------
* Intel IvyBridge-EP
Bug Fixes:
----------
* Many perf_event fixes
* Cuda component fixes
* IA64 and SPARC build fixes
Enhancements:
------------
* Better logic in run_tests.sh script
* ARM builds now use pthread_mutexes
* BG/Q overflow enhancements
===============================================================================
PAPI 5.1.0 RELEASE NOTES 11 Jan 2013
===============================================================================
For specific and detailed information on changes made in this release, grep
ChangeLogP510.txt for keywords of interest or go directly to the PAPI git
repo.
New Platform:
-------------
* Intel Xeon Phi ( Knight's Corner or KNC or MIC )
Bug Fixes:
----------
* Various build system fixes.
* NVML component fix.
* Work around a sampling bug on Power Linux
Enhancements:
------------
* ARM Cortex A15 support.
* New API entry, PAPI_get_eventset_component
* Add options to papi_command_line to print in hex and unsigned formats
New Components:
---------------
* MIC Power component.
===============================================================================
PAPI 5.0.1 RELEASE NOTES 20 Sep 2012
===============================================================================
For specific and detailed information on changes made in this release, grep
ChangeLogP501.txt for keywords of interest or go directly to the PAPI git
repo.
GENERAL NOTES
===============================================================================
This in a bug fix release of PAPI. Including a major bug fix in the preset
code, we recommend that all users of PAPI 5.0 upgrade; see commit 866bd51c
for a detailed discussion.
Bug Fixes:
----------
* Debugging macros with out variadic macro support.
* Building PAPI with an external libpfm4 installation.
* Fix a major bug in the preset code.
Enhancements:
-------------
* CUDA configure script better supports Kepler architecture.
* rapl support for IvyBridge.
* Libpfm4 updates for SandyBridge-EP counters.
===============================================================================
PAPI 5.0.0 RELEASE NOTES 23 Aug 2012
===============================================================================
For specific and detailed information on changes made in this release, grep
ChangeLogP500.txt for keywords of interest or go directly to the PAPI git
repo.
GENERAL NOTES
===============================================================================
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. Numerous bug fixes are also included in this release.
New Platforms:
-------------
* Intel IvyBridge
* Intel Atom Cedarview
New / Improved Components:
---------------
* nVidia Management library component - support for various system health
and power measurements on supported nVidia gpus.
* stealtime - When running in a VM, this provides information on how much
time was "stolen" by the hypervisor due to the VM being disabled.
This is currently only supported on KVM.
* RAPL - a SandyBridge RAPL (Running Average Power Level) Component
providing for energy measurement at the package-level.
* VMware component for VMware pseudo-counters
* appio - This application I/O component enables PAPI-C to determine
I/O used by the application.
Bug Fixes:
----------
* Numerous memory leaks, thread races, and compiler warnings corrected.
Enhancements:
-------------
* Major overhaul of the component interface.
* Update perf_event.c rdpmc support
* Minor uncore fixes plus changes for rdpmc.
* Add a PAPI_REF_CYC preset event, defined as UNHALTED_REFERENCE_CYCLES for
all Intel platforms on which this native event is supported.
* Component names are now standardized in a meaningful way.
* Multiplexing under perf_events has been improved.
* FreeBSD cleanup/updates
* appio component now intercepts recv()
* Power7 definition of L1_DCA and LST_INS updated to a countable definition
* Added BGPM's opcode and generic event functionality to PAPI for BG/Q
(requires Q32 driver V1R1M2).
Open Issues:
-------------
* SandyBridge PAPI_FP_* events only produce reasonable results when counted
by themselves.
* Ivy Bridge does not support floating point events.
Experimental:
-------------
Known Bugs:
-----------
* Software multiplexing is known to have a memory leak.
* The byte-profile test is known to fail on Power7/AIX
Deprecated:
---------------------
* Java PAPI wrappers
* Windows
===============================================================================
PAPI 4.4.0 RELEASE NOTES 17 Apr 2012
===============================================================================
For specific and detailed information on changes made in this release, grep
ChangeLogP440.txt for keywords of interest or go directly to the PAPI git
repo.
GENERAL NOTES
===============================================================================
This is a major release of PAPI-C. Support for IBM Blue Gene/Q has been added.
Multiple bug fixes are also included in this release.
This is also the first release of papi made from the git repository;
git clone http://icl.cs.utk.edu/git/papi.git
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/
RECENT CHANGES IN PAPI 4.4.0
===============================================================================
New Platforms:
-------------
* src/Rules.bgpm... Added PAPI support for Blue Gene/Q.
Bug Fixes:
----------
* 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
Enhancements:
-------------
* Update the release machinery for git.
===============================================================================
PAPI 4.2.1 RELEASE NOTES 13 Feb 2012
===============================================================================
For specific and detailed information on changes made in this release, grep
the ChangeLogP421.txt file for keywords of interest or go directly to the PAPI
cvs tree.
GENERAL NOTES
===============================================================================
This is a minor release of PAPI-C. It does not break binary or semantic
compatibility with previous versions.
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/
RECENT CHANGES IN PAPI 4.2.1
===============================================================================
Bug Fixes:
----------
* solaris substrate set_domain call was added.
* multiplexing math errors were fixed in perf_events.c
* more multiplexing read path errors were identified and fixed
* src/linux-timer.c: Fix compilation warning if you specify
--with-walltime=gettimeofday
* src/linux-timer.c: Fix the build on Linux systems using mmtimer
* src/linux-common.c: Update the linux MHz detection code to use
bogoMIPS when there is no MHz field available in /proc/cpuinfo.
* src/: configure, configure.in: Fix a typo in the perfctr section;
it was causing a machine to default to perfctr when it had no
performance interface. ( a centos vm image with a 2.6.18 kernel)
Also checks that we actually have perfctr if we specify
--with-perfctr.
* Fix SMP ARM issues reported by Harald Servat.
Also, adds proper header dependency checking in the Rules files.
* src/ctests/api.c: Make the api test actually test PAPI_flops() as
it claims to do, rather than PAPI_flips().
* src/papi_events.csv: Update the coreduo (not core2) events. Most
notably the FP events were wrong.
* src/papi_events.csv: Modify Intel Sandybridge PAPI_FP_OPS and
PAPI_FP_INS events to not count x87 fp instructions.
The problem is that the current predefines were made by adding 5
events. With the NMI watchdog stealing an event and/or
hyperthreading reducing the number of available counters by half,
we just couldn't fit.
This now raises the potential for people using x87-compiled
floating point on Sandybridge and getting 0 FP_OPS. This is only
likely if running a 32-bit kernel and *not* compiling your code
with -msse.
A long-term solution might be trying to find a better set of FP
predefines for sandybridge.
* src/components/lmsensors/: Rules.lmsensors, configure.in: Fixed
configure error message and rules link error for shared object
linking. Thanks Will Cohen.
* src/components/lmsensors/linux-lmsensors.h: Added missing string
header
* src/components/net/tests/: net_values_by_code.c,
net_values_by_name.c: Apply patch suggested by Will Cohen to
check for system return values.
* src/Makefile.inc: Patch to cleanup dependencies, allowing for
parallel makes. Patch due to Will Cohen from redhat
* src/: papi_internal.c, threads.c: Fix two race
conditions that are probably the cause of the pthrtough
double-free error.
When freeing a thread, we remove and free all eventsets belonging
to that thread. This could race with the thread itself removing
the evenset, causing some ESI fields to be freed twice.
The problem was found by using the Valgrind 3.8 Helgrind tool
valgrind --tool=helgrind --free-is-write=yes ctests/pthrtough
In order for Helgrind to work, I had to temporarily modify PAPI
to use POSIX pthread mutexes for locking.
Enhancements:
-------------
* general doxygen cleanups
* cleanup output of overflow_allcounters for clarity in debugging
* updates to most recent (as of Feb 1) libpfm4
* remove now-opaque event codes from papi_native_avail
and papi_xml_event_info
* src/: papi_internal.c Update the component initialization code
so that it can handle a PAPI ERROR return gracefully. Previously
there was no way to indicate initialization failure besides just
setting num_native_events to 0.
New Platforms:
-------------
* src/libpfm4/lib/: pfmlib_amd64_fam11h.c, events/amd64_events_fam11h.h
Support for AMD Family 11.
* src/libpfm4/lib/: pfmlib_amd64_fam12h.c, events/amd64_events_fam12h.h
Support for AMD Family 12.
Deprecated Platforms:
---------------------
* remove obsolete ACPI component
New / Improved Components:
---------------
* PAPI CUDA component updated for CUDA / CUPTI 4.1.
* SetCudaDevice() now works with the latest CUDA 4.1 version.
* Auto-detection of CUDA version for backward compatibility.
* PAPI_read() now accumulates event values. This fixes a bug
in earlier versions.
* extensive updates and cleanups to the example and coretemp components.
* significant updates of lustre, and mx components
* The linux net component underwent extensive updates and cleanups.
In particular, it nows dynamically detects the network
interface names [1] and export 16 counters for each interface
(see also src/components/net/{CHANGES,README}).
Open Issues:
-------------
* multiplex1.c was rewritten to expose a multiplexing bug in the perf_events
kernel (3.0.3) for MIPS
* src/components/lmsensors/: Latest versions of lmsensors are incompatible
with current lmsensors component. Interface needs to be updated for forward
compatibility.
* There's a problem with broken overflow on POWER6 linux systems.
We suspect a kernel problem, but don't know exactly which version(s)
We're running a 2.6.36 kernel where the problem has been identified.
It may be fixed in newer versions.
Experimental:
-------------
* a new vmware component has been added to report a variety of soft events
when running as a guest in a VMWare environment
===============================================================================
PAPI 4.2.0 RELEASE NOTES 26 Oct 2011
===============================================================================
For specific and detailed information on changes made in this release, grep
the ChangeLogP420.txt file for keywords of interest or go directly to the PAPI
cvs tree.
GENERAL NOTES
===============================================================================
This is a major release of PAPI-C. It add a significant new feature in
user-defined events. It also marks a shift from external (and out-dated)
man pages to doxygen generated man pages. These pages can be found online at:
http://icl.cs.utk.edu/papi/docs/. They are also installable with "make install",
and you can build your own versions using doxygen.
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/
RECENT CHANGES IN PAPI 4.2.0
===============================================================================
Bug Fixes:
----------
* Bug in CUDA v4.0 fixed. It caused a threaded application to hang when
parent called cuInit() before fork() and child called also cuInit().
All fork ctests pass now if papi is configured with cuda component.
* If papi is configured with cuda component and running a threaded
application, we need to make sure that a thread doesn't free the same
memory location(s) more than once. Now all pthread ctests pass with cuda.
* ctests/thrspecific works now with the CUDA component
* Added CudaRemoveEvent functionality (broken in earlier CUDA RC versions).
* ctests/all_native_events works now for the default CUDA device.
* Add locking to papi_pfm4_events so that adding/looking up event names
doesn't have a race condition when multiple threads are doing it at once.
* Fixed a series of problems with Itanium builds.
* Set FD_CLOEXEC on the overflow signal handler fd. Otherwise if we exec()
with overflow enabled, the exec'd process will quickly die due to lack
of signal handler. This patch is needed due to a change in behavior in
Linux 3.0. Mark Krentel first noticed this problem.
* Recent Ubuntu versions use the ld flag --as-needed by default, which
breaks the PAPI configure step for the libdl check, as the
--as-needed flag enforces the rule that libraries must come after the
object files on the command line, not before. The fix for this is to put
the libdl check it in LIBS instead of in LDFLAGS.
* Removed an fopen() without an fclose() on /proc/cpuinfo in papi.c.
This was being done to set the event masks properly for itanium and p4.
Since the platform code sets CPU vendor and family for us we don't
really have to open cpuinfo. This fix may also work on non-Linux
systems too.
* Update papi.h to properly detect if being built with a C99 compiler.
Enhancements:
-------------
* Default support for libpfm4
* ./configure --with-libpfm3 to support legacy libpfm3 builds
* PERF_COUNT_SW software events are available under perf_events with
libpfm4
* Nehalem/Westmere/SandyBridge Offcore event support is ready,
but support is not yet available in the Linux kernel.
* Add new utility to display PAPI error codes and description strings.
* Add API to access error descriptions: PAPI_descr_error( int error_code).
* Add support for handling multiattach properly.
* Cleanups to avoid gcc-4.6 warnings.
* Added ability to add tests to components. All component tests are
compiled with PAPI when typing 'make'and cleaned up with 'make clean'
or 'make clobber'. Also added tests to the example and cuda components.
* CUDA component is now thread-safe. Multiple CPU
threads can access the same CUDA context. Note, it's possible to
create a different CUDA context for each thread, but then we are
likely running into a limitation that only one context can be
profiled at a time.
* LOTS of code cleanup thanks to Will Cohen of RedHat.
* Refactored test code so no-cpu-counters can build with components
* Build all utilities with no-cpu-counters
* Modify run_tests.sh so that you can set the VALGRIND command
externally via environment variable without having to edit
run_tests.sh itself. Also adds Date and cpuinfo information to the
beginning of run_tests.sh results. This can help when run_tests.sh
output is passed around when debugging a problem.
* Parallel make now works.
New Platforms:
-------------
* AMD Family 14h Bobcat (libpfm4 only)
* Intel SandyBridge (libpfm4 only)
* ARM Cortex-A8 and Cortex-A9 (libpfm4 only)
Deprecated Platforms:
---------------------
* although still technically supported, we are no longer actively testing
platforms based on the perfmon and perfctr patches. All linux kernels
> 2.6.32 provide internal support for perf_events.
New / Improved Components:
---------------
* Add a number of 'native' events to the component info structure in
example component.
* Introduce a papi_component_avail utility; lists the components we were
built with, optionally with native/preset counts and version number.
Open Issues:
-------------
* On newer Linux kernels (2.6.34+) the nmi_watchdog counter can steal one
of the counters, reducing by one the total available.
There's a bug in Linux where if you try to use the full number of
counters on such a system with a group leader, the sys_perf_open()
call will succeed only to fail at read time.
(instead of the proper error code at open time).
I do wish there were a way to notify the user more visibly,
because losing a counter (when you might only have 4 total to
begin with) is a big deal, and most Linux vendors are starting to
ship kernels with the nmi_watchdog enabled.
Experimental:
-------------
* Preliminary support for MIPS 74K.
===============================================================================
PAPI 4.1.4 RELEASE NOTES 29 Aug 2011
===============================================================================
For specific and detailed information on changes made in this release, grep
the ChangeLogP414.txt file for keywords of interest or go directly to the PAPI
cvs tree.
GENERAL NOTES
===============================================================================
This is an internal release of PAPI-C targetted specifically for a Cray tools
release. It precedes a more general 4.2.0 release and incorporates changes and
updates since PAPI 4.1.3.
Detailed changes will be documented in the 4.2.0 release. Meanwhile the list
below highlights the most significant changes since 4.1.3.
* Intel SandyBridge is now supported
* libpfm4 support has been updated
* internal doxygen documentation has been added for the entire API
* the man pages have been replaced with doxygen generated man pages
* CUDA component support has been improved
* an infrastructure for testing components only has been implemented
* various bugs have been addressed
If you find issues with the 4.1.4 release, please bring them to our attention
ASAP, so they can be addressed prior to the general 4.2.0 release.
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/
===============================================================================
PAPI 4.1.3 RELEASE NOTES 06 May 2011
===============================================================================
For specific and detailed information on changes made in this release, grep
the ChangeLogP413.txt file for keywords of interest or go directly to the PAPI
cvs tree.
GENERAL NOTES
===============================================================================
This is a minor release of PAPI-C. It addresses a number of bugs and other
issues that have surfaced since the 4.1.2 release.
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 4.1.3 SINCE PAPI 4.1.2
===============================================================================
Bug Fixes:
----------
* Fixed a linux-timer.c compile error that only shows up on PPC.
* Fixed ctests/all_native_events.c:
It failed when PAPI was built with several components because the
eventset failed to add events that were not from the first component.
* Redefined PAPI_FP_OPS for Nehalem; Now counts properly for 32-bit code.
* Uncovered and resolved bugs in attaching to fork/exec'd code.
* Reworked eventset cleanup code to avoid an error situation in perf_events
where events were being removed from a terminated attached process.
* Fixed a configure bug preventing non-default bitmode builds of perf_event
versions of PAPI.
Enhancements:
-------------
* consolidated a bunch of duplicated linux code into "linux-xxx.c" files.
* Split WIN32 specific code out from linux common code.
* Renamed various perfctr functions to be _perfctr_ rather than _linux_.
* Added function pointer destroy_eventset to the PAPI vector table.
Needed for the CUDA Component.
* PAPI_assign_eventset_component now refuses to reassign components.
* Implemented inherit feature for perf_events. Thanks to Gary Mohr.
* Added a case to utils/cost.c to test for processing derived events.
* Added utils/multiplex_cost.c.
* Added --with-assumed-kernel to configure
New Platforms:
-------------
* POWER7 / AIX support is now available (see Known Bugs below)
* Intel Westmere for perfctr.
* AMD Family 15h (Interlagos) and 10h RevE processors.
Deprecated Platforms:
---------------------
New Components:
---------------
* NVidia CUDA: still in pre-release until NVidia releases official CUDA4.
Open Issues:
-------------
* Currently using PAPI_attach() to attach to multiple processes at the same
time will not work. On the perf_events substrate this may fail with a
PAPI_EISRUN error for the subsequent attaches. On other substrates the
additional attaches may work but results read back will be invalid.
This behavior will be fixed in a subsequent PAPI release.
Experimental:
-------------
* libpfm4 support is experimentally available but subject to change
Known Bugs:
-----------
* POWER7 / AIX has some known bugs in this version:
* PAPI_FP_OPS overcounts by 50% in many cases
* multiplexing does not work correctly
* memory limits for threaded tests are causing problems
===============================================================================
PAPI 4.1.2 RELEASE NOTES 20 Jan 2011
===============================================================================
For specific and detailed information on changes made in this release, grep
the ChangeLogP412.txt file for keywords of interest or go directly to the PAPI
cvs tree.
GENERAL NOTES
===============================================================================
This is a minor release of PAPI-C. It addresses a number of bugs and other
issues that have surfaced since the 4.1.1 release.
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 4.1.2 SINCE PAPI 4.1.1
===============================================================================
Bug Fixes:
----------
* fixed a long-standing subtle bug identified by Richard Strong that caused
segfaults when multiplexing
* fixed several bugs that were causing test failures on POWER6/AIX
* properly detect Pentium M in configure
* fixed a problem with perf_events not properly handling overflows; first
identified by Mark Krentel
* fixed a problem where perfctr was silently adding uncountable events
* fixed a lock bug identified by Martin Schindewolf
* fixed forking order for {multi|zero}_attach.c
Enhancements:
-------------
* updated support for freeBSD submitted by Harald Servat
* a plethora of code cleanups submitted by Robert Richter
* addressed compatibility issues in run_tests.sh to make it posix comliant
* refreshed PAPI_Matlab support
* reimplemented SUBDBG print capabilities to address an issue first
identified by Maynard Johnson
* refreshed preset event definitions for Nehalem, including implementations
for PAPI_HW_INT; submitted by Michel Brown
* added 3 new error codes: PAPI_EATTR, PAPI_ECOUNT, and PAPI_ECOMBO.
These provide more detail on why an event add fails
* implement cpuid leaf4 mtrics required by Intel Westmere
New Platforms:
-------------
* Intel Westmere on perfctr and perf_events
Deprecated Platforms:
---------------------
New Components:
---------------
Open Issues:
-------------
* PowerPC970 / linux is currently not supported by configure
* POWER7 / AIX support is in development
Experimental:
-------------
* libpfm4 support is experimentally available and subject to change
Known Bugs:
-----------
===============================================================================
PAPI 4.1.1 RELEASE NOTES 01 Oct 2010
===============================================================================
For specific and detailed information on changes made in this release, grep
the ChangeLogP411.txt file for keywords of interest or go directly to the PAPI
cvs tree.
GENERAL NOTES
===============================================================================
This is a minor release of PAPI-C. It addresses a number of bugs and other
issues that have surfaced since the 4.1.0 release.
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 4.1.1 SINCE PAPI 4.1.0
===============================================================================
Bug Fixes:
----------
* resolved confusion in event table naming for Intel Core, Core2 and Core
Duo processors; cleaned up Nehalem and Westmere event definitions.
* the --with-no-cpu-counters function and timing functions for AIX
were fixed.
* compiler flags for AIX Fortran were fixed.
* doc directory is now preserved to prevent 'make clean' from entering an
ininite loop.
* prevent passing -Wextra to libpfm build, which was throwing errors in
that build under certain circumstances.
* fix a subtle problem in multiplexing in which final counter values could
be under-reported. Changes the behavior of PAPI_stop when multiplexing.
See the ChangeLog for further details.
Enhancements:
-------------
* now supports attach/detach for perf_events, thanks to Gary Mohr.
* update cache information for recent Intel x86 processors.
* F_SETOWN_EX was implemented in perf_events to guarantee that each
process recieves it's own interrupts. This fixes a bug in high
interrupt rates reported by Rice.
* perf_events checks permissions at configuration rather than at start.
Thanks to Gary Mohr.
* Pentium IV now supported under perf_events in kernel 2.6.35
* add a WARNING for tests cases that don't fail but have issues
that may need to be addressed.
* add OS kernel version to component info struct; useful for enabling /
diabling features in PAPI based on kernel version
* updated to terminal release (3.10) of libpfm.
* mmtimer support added for Altix / perf_events.
New Platforms:
-------------
Deprecated Platforms:
---------------------
* support for perf_counters in the 2.6.31 Linux kernel has been deprecated
New Components:
---------------
* CoreTemp: exposes stuff in the /sys/class/hwmon directory
Open Issues:
-------------
* support for cross-compiling perf-events on new Cray architectures is
still in development.
Experimental:
-------------
Known Bugs:
-----------
===============================================================================
PAPI 4.1.0 RELEASE NOTES 22 Jun 2010
===============================================================================
For specific and detailed information on changes made in this release, grep
the ChangeLogP410.txt file for keywords of interest or go directly to the PAPI
cvs tree.
GENERAL NOTES
===============================================================================
This is the second release of Component PAPI, or PAPI-C. See other references
to PAPI-C, including the description in this file under PAPI 4.0.0 for details
on the differences between Classic PAPI and PAPI-C.
This release includes significant code cleanup to eliminate compiler warnings
and type inconsistencies and to eliminate memory leaks.