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Copyright © 2009 CNRS
Copyright © 2009-2023 Inria. All rights reserved.
Copyright © 2009-2013 Université Bordeaux
Copyright © 2009-2011 Cisco Systems, Inc. All rights reserved.
Copyright © 2020 Hewlett Packard Enterprise. All rights reserved.
$COPYRIGHT$
Additional copyrights may follow
$HEADER$
===========================================================================
This file contains the main features as well as overviews of specific
bug fixes (and other actions) for each version of hwloc since version
0.9.
Version 3.0.0
-------------
* API
+ hwloc_get_type_depth_with_attr() generalizes hwloc_get_type_depth() by
using object attributes to disambiguate multiple levels with same type.
- hwloc_type_sscanf_as_depth() is deprecated in favor of
hwloc_type_sscanf() followed by hwloc_get_type_depth_with_attr().
+ hwloc_obj_attr_snprintf() now displays KiB/MiB/GiB/TiB units for sizes.
+ The verbose attribute of hwloc_obj_type/attr_snprintf() is replaced
by flags, where value 1 keeps the same meaning as in hwloc 2.x.
+ PCI domains are now always 32bits.
+ The "programming interface" of PCI devices is now exposed
in PCI object attributes.
+ The OS device "type" attribute is now a bitmask.
- "Block" OS devices are now "Storage" (for actual Block devices)
and/or "Memory" (for Linux DAX and CXL devices, etc).
- Some "CoProcessors" are also "GPUs" (e.g. CUDA devices),
and some GPUs are also CoProcessors (e.g. RSMI).
- "OpenFabrics" devices are now also "Network".
- BXI interfaces are now "Network" instead of "OpenFabrics".
- See "OS devices" in the documentation for details.
+ The "Backend" info attribute of OS devices is now in the topology
root object together with other backends.
+ The array and count of info attributes are now embedded in the new
struct hwloc_infos_s.
- hwloc_infos_s structures may be modified with hwloc_modify_infos().
- hwloc_topology_get_infos() returns the new topology-global array
of info attributes.
. Several info attributes previously stored in the root object are
now topology attributes (e.g. information about hwloc, about the
discovery, operating system information returned by uname).
See "Custom string infos" in the documentation for details.
- hwloc_cpukinds_get_info() and hwloc_cpukinds_register() now manipulate
infos as such a structure.
* Tools
+ lstopo has a new --osf option to tune the displaying of object
attributes and units.
* Removed features
+ Netloc.
+ Importing and exporting from/to hwloc 1.x XML.
+ BlueGene/Q support.
+ Functions that were deprecated since 2.0:
- hwloc_topology_insert_misc_object_by_parent()
- hwloc_obj_cpuset_snprintf()
- hwloc_obj_type_sscanf()
- hwloc_cpuset_to_nodeset_strict()
- hwloc_cpuset_from_nodeset_strict()
+ HWLOC_PCI_<domain>_<bus>_LOCALCPUS environment variables,
superseded with a single HWLOC_PCI_LOCALITY since 2.0.
* Misc
+ hwloc_topology_allow() is now possible on shmem-adopted topology.
This allows to share a topology between processes in different
Linux cgroups, etc.
+ XML format switches to 3.0 by default. Exporting to 2.x is
possible with the new V2 XML export flag.
Version 2.9.2
-------------
* Don't forget L3i when defining filters for multiple levels of caches
with hwloc_topology_set_cache/icache_types_filter().
* Fix object total_memory after hwloc_topology_insert_group_object().
* Fix the (non-yet) exporting in synthetic description for complex memory
hierarchies with memory-side caches, etc.
* Fix some default size attributes when building synthetic topologies.
* Fix size units in hwloc-annotate.
* Improve bitmap reallocation error management in many functions.
* Documentation improvements:
+ Better document return values of functions.
+ Add "Error reporting" section (in hwloc.h and in the doxygen doc).
+ Add FAQ entry "What may I disable to make hwloc faster?"
+ Improve FAQ entries "Why is lstopo slow?" and
"I only need ..., why should I use hwloc?"
+ Clarify how to deal with cpukinds in hwloc-calc and hwloc-bind
manpages.
Version 2.9.1
-------------
* Don't forget to apply object type filters to "perflevel" caches detected
on recent Mac OS X releases, thanks to Michel Lesoinne for the report.
* Fix a failed assertion in hwloc_topology_restrict() when some NUMA nodes
are removed because of HWLOC_RESTRICT_FLAG_REMOVE_CPULESS but no PUs are.
Thanks to Mark Grondona for reporting the issue.
* Mark HPE Cray Slingshot NICs with subtype "Slingshot".
Version 2.9.0
-------------
* Backends
+ Expose the memory size of CXL memory devices (Type 3) on Linux.
+ The LevelZero backend now reports the "XeLinkBandwidth" distance
matrix between L0 devices (and subdevices) when available.
+ Add support for CUDA compute capability up to 9.0.
* Tools
+ lstopo now switches to console mode when its output is redirected.
Graphical window mode may be forced back with --of window.
+ hwloc-calc now accepts "numa" in -H, and I/O subtypes such as "gpu"
in -I and -N.
Version 2.8.0
-------------
* API
+ Add HWLOC_TOPOLOGY_FLAG_NO_DISTANCES, _NO_MEMATTRS and _NO_CPUKINDS
to reduce the overhead when unneeded.
+ Add separate Read/Write Bandwidth/Latency memory attributes and
implement them on Linux.
* Backends
+ NUMA nodes may now have a subtype such as DRAM, HBM, SPM, or NVM
on heterogeneous memory platforms on Linux.
- Add DAXType and DAXParent attributes on Linux to tell where a
DAX device or its corresponding NUMA node come from (SPM for
Specific-Purpose or NVM for Non-Volatile Memory).
+ Detect heterogeneous caches in hybrid CPUs on MacOS X,
thanks to Paul Bone for the help.
+ Max frequencies are not ignored in Linux cpukinds anymore (they were
ignored in hwloc 2.7.0), but they may be slightly adjusted to avoid
reporting hybrid CPUs because Intel Turbo Boost Max 3.0.
- See the documentation of environment variable HWLOC_CPUKINDS_MAXFREQ.
+ Hardwire the PCI locality of HPE Cray EX235a nodes.
* Tools
+ lstopo and other tools may now load Linux and x86 cpuid topology files
from a tarball.
+ lstopo may now replace the P# and L# index prefixes with custom strings
thanks to --os-index-prefix and --logical-index-prefix options.
* Misc
+ Add --disable-readme to avoid regenerating the top-level hwloc README
file from the documentation.
Version 2.7.2
-------------
* Fix a crash when LevelZero devices have multiple subdevices,
e.g. on PonteVecchio GPUs, thanks to Jonathan Peyton.
* Fix a leak when importing cpukinds from XML,
thanks to Hui Zhou.
Version 2.7.1
-------------
* Workaround crashes when virtual machines report incoherent x86 CPUID
information about numbers of cores and threads.
Thanks to Peter Bense for the report.
* Use setenv() instead of putenv() when trying to force enable oneAPI L0
support, to avoid issues with applications that touch the environment,
thanks to Josh Hursey for the patch.
* Add some warnings at the end of configure when GPU libraries are
missing on the system or their path is missing in the environment.
Version 2.7.0
-------------
* Backends
+ Add support for NUMA nodes and caches with more than 64 PUs across
multiple processor groups on Windows 11 and Windows Server 2022.
+ Group objects are not created for Windows processor groups anymore,
except if HWLOC_WINDOWS_PROCESSOR_GROUP_OBJS=1 in the environment.
+ Expose "Cluster" group objects on Linux kernel 5.16+ for CPUs
that share some internal cache or bus. This can be equivalent
to the L2 Cache level on some platforms (e.g. x86) or a specific
level between L2 and L3 on others (e.g. ARM Kungpeng 920).
Thanks to Jonathan Cameron for the help.
- HWLOC_DONT_MERGE_CLUSTER_GROUPS=1 may be set in the environment
to prevent these groups from being merged with identical caches, etc.
+ Improve the oneAPI LevelZero backend:
- Expose subdevices such as "ze0.1" inside root OS devices ("ze0")
when the hardware contains multiple subdevices.
- Add many new attributes to describe device type, and the
numbers of slices, subslices, execution units and threads.
- Expose the memory information as LevelZeroHBM/DDR/MemorySize infos.
+ Ignore the max frequencies of cores in Linux cpukinds when the
base frequencies are available (to avoid exposing hybrid CPUs
when Intel Turbo Boost Max 3.0 gives slightly different max
frequencies to CPU cores).
- May be reverted by setting HWLOC_CPUKINDS_MAXFREQ=1 in the environment.
* Tools
+ Add --grey and --palette options to switch lstopo to greyscale or
white-background-only graphics, or to tune individual colors.
* Build
+ Windows CMake builds now support non-MSVC compilers, detect several
features at build time, can build/run tests, etc.
Thanks to Michael Hirsch and Alexander Neumann .
Version 2.6.0
-------------
* Backends
+ Expose two cpukinds for energy-efficient cores (icestorm) and
high-performance cores (firestorm) on Apple M1 on Mac OS X.
+ Use sysfs CPU "capacity" to rank hybrid cores by efficiency
on Linux when available (mostly on recent ARM platforms for now).
+ Improve HWLOC_MEMBIND_BIND (without the STRICT flag) on Linux kernel
>= 5.15: If more than one node is given, the kernel may now use all
of them instead of only the first one before falling back to others.
+ Expose cache os_index when available on Linux, it may be needed
when using resctrl to configure cache partitioning, memory bandwidth
monitoring, etc.
+ Add a "XGMIHops" distances matrix in the RSMI backend for AMD GPU
interconnected through XGMI links.
+ Expose AMD GPU memory information (VRAM and GTT) in the RSMI backend.
+ Add OS devices such as "bxi0" for Atos/Bull BXI HCAs on Linux.
* Tools
+ lstopo has a better placement algorithm with respect to I/O
objects, see --children-order in the manpage for details.
+ hwloc-annotate may now change object subtypes and cache or memory
sizes.
* Build
+ Allow to specify the ROCm installation for building the RSMI backend:
- Use a custom installation path if specified with --with-rocm=<dir>.
- Use /opt/rocm-<version> if specified with --with-rocm-version=<version>
or the ROCM_VERSION environment variable.
- Try /opt/rocm if it exists.
- See "How do I enable ROCm SMI and select which version to use?"
in the FAQ for details.
+ Add a CMakeLists for Windows under contrib/windows-cmake/ .
* Documentation
+ Add FAQ entry "How do I create a custom heterogeneous and
asymmetric topology?"
Version 2.5.0
-------------
* API
+ Add hwloc/windows.h to query Windows processor groups.
+ Add hwloc_get_obj_with_same_locality() to convert between objects
with same locality, for instance NUMA nodes and Packages,
or OS devices within a PCI device.
+ Add hwloc_distances_transform() to modify distances structures.
- hwloc-annotate and lstopo have new distances-transform options.
+ hwloc_distances_add() is replaced with _add_create() followed by
_add_values() and _add_commit(). See hwloc/distances.h for details.
+ Add topology flags to mitigate binding modifications during
hwloc discovery, especially on Windows:
- HWLOC_TOPOLOGY_FLAG_RESTRICT_TO_CPUBINDING and _MEMBINDING
restrict discovery to PUs and NUMA nodes inside the binding.
- HWLOC_TOPOLOGY_FLAG_DONT_CHANGE_BINDING prevents from ever
changing the binding during discovery.
* Backends
+ Add a levelzero backend for oneAPI L0 devices, exposed as OS devices
of subtype "LevelZero" and name such as "ze0".
- Add hwloc/levelzero.h for interoperability between converting
between L0 API devices and hwloc cpusets or OS devices.
+ Expose NEC Vector Engine cards on Linux as OS devices of subtype
"VectorEngine" and name "ve0", etc.
Thanks to Anara Kozhokanova, Tim Cramer and Erich Focht for the help.
+ Add a NVLinkBandwidth distances structure between NVIDIA GPUs
(and POWER processor or NVSwitches) in the NVML backend,
and a XGMIBandwidth distances structure between AMD GPUs
in the RSMI backends.
- See "Topology Attributes: Distances, Memory Attributes and CPU Kinds"
in the documentation for details about these new distances.
+ Add support for NUMA node 0 being offline in Linux, thanks to Jirka Hladky.
* Build
+ Add --with-cuda-version=<version> or look at the CUDA_VERSION
environment variable to find the appropriate CUDA pkg-config files.
Thanks to Stephen Herbein for the suggestion.
- Also add --with-cuda=<dir> to specify the CUDA installation path
manually (and its NVML and OpenCL components).
Thanks to Andrea Bocci for the suggestion.
- See "How do I enable CUDA and select which CUDA version to use?"
in the FAQ for details.
* Tools
+ lstopo now has a --windows-processor-groups option on Windows.
+ hwloc-ps now has a --short-name option to avoid long/truncated
command path.
+ hwloc-ps now has a --single-ancestor option to return a single
(possibly too large) object where a process is bound.
+ hwloc-ps --pid-cmd may now query environment variables,
including MPI-specific variables to find out process ranks.
Version 2.4.1
-------------
* Fix AMD OpenCL device locality when PCI bus or device number >= 128.
Thanks to Edgar Leon for reporting the issue.
+ Applications using any of the following inline functions must
be recompiled to get the fix: hwloc_opencl_get_device_pci_busid()
hwloc_opencl_get_device_cpuset(), hwloc_opencl_get_device_osdev().
* Fix the ranking of cpukinds on non-Windows systems,
thanks to Ivan Kochin for the report.
* Fix the insertion of custom Groups after loading the topology,
thanks to Scott Hicks.
* Add support for CPU0 being offline in Linux, thanks to Garrett Clay.
* Fix missing x86 Package and Core objects FreeBSD/NetBSD.
Thanks to Thibault Payet and Yuri Victorovich for the report.
* Fix the import of very large distances with heterogeneous object types.
* Fix a memory leak in the Linux backend,
thanks to Perceval Anichini.
Version 2.4.0
-------------
* API
+ Add hwloc/cpukinds.h for reporting information about hybrid CPUs.
- Use Linux cpufreq frequencies to rank cores by efficiency.
- Use x86 CPUID hybrid leaf and future Linux kernels sysfs CPU type
files to identify Intel Atom and Core cores.
- Use the Windows native EfficiencyClass to separate kinds.
* Backends
+ Properly handle Linux kernel 5.10+ exposing ACPI HMAT information
with knowledge of Generic Initiators.
* Tools
+ lstopo has new --cpukinds and --no-cpukinds options for showing
CPU kinds or not in textual and graphical modes respectively.
+ hwloc-calc has a new --cpukind option for filtering PUs by kind.
+ hwloc-annotate has a new cpukind command for modifying CPU kinds.
* Misc
+ Fix hwloc_bitmap_nr_ulongs(), thanks to Norbert Eicker.
+ Add a documentation section about
"Topology Attributes: Distances, Memory Attributes and CPU Kinds".
+ Silence some spurious warnings in the OpenCL backend and when showing
process binding with lstopo --ps.
Version 2.3.0
-------------
* API
+ Add hwloc/memattrs.h for exposing latency/bandwidth information
between initiators (CPU sets for now) and target NUMA nodes,
typically on heterogeneous platforms.
- When available, bandwidths and latencies are read from the ACPI HMAT
table exposed by Linux kernel 5.2+.
- Attributes may also be customized to expose user-defined performance
information.
+ Add hwloc_get_local_numanode_objs() for listing NUMA nodes that are
local to some locality.
+ The new topology flag HWLOC_TOPOLOGY_FLAG_IMPORT_SUPPORT causes
support arrays to be loaded from XML exported with hwloc 2.3+.
- hwloc_topology_get_support() now returns an additional "misc"
array with feature "imported_support" set when support was imported.
+ Add hwloc_topology_refresh() to refresh internal caches after modifying
the topology and before consulting the topology in a multithread context.
* Backends
+ Add a ROCm SMI backend and a hwloc/rsmi.h helper file for getting
the locality of AMD GPUs, now exposed as "rsmi" OS devices.
Thanks to Mike Li.
+ Remove POWER device-tree-based topology on Linux,
(it was disabled by default since 2.1).
* Tools
+ Command-line options for specifying flags now understand comma-separated
lists of flag names (substrings).
+ hwloc-info and hwloc-calc have new --local-memory --local-memory-flags
and --best-memattr options for reporting local memory nodes and filtering
by memory attributes.
+ hwloc-bind has a new --best-memattr option for filtering by memory attributes
among the memory binding set.
+ Tools that have a --restrict option may now receive a nodeset or
some custom flags for restricting the topology.
+ lstopo now has a --thickness option for changing line thickness in the
graphical output.
+ Fix lstopo drawing when autoresizing on Windows 10.
+ Pressing the F5 key in lstopo X11 and Windows graphical/interactive outputs
now refreshes the display according to the current topology and binding.
+ Add a tikz lstopo graphical backend to generate picture easily included into
LaTeX documents. Thanks to Clement Foyer.
* Misc
+ The default installation path of the Bash completion file has changed to
${datadir}/bash-completion/completions/hwloc. Thanks to Tomasz Kłoczko.
Version 2.2.0
-------------
* API
+ Add hwloc_bitmap_singlify_by_core() to remove SMT from a given cpuset,
thanks to Florian Reynier for the suggestion.
+ Add --enable-32bits-pci-domain to stop ignoring PCI devices with domain
>16bits (e.g. 10000:02:03.4). Enabling this option breaks the library ABI.
Thanks to Dylan Simon for the help.
* Backends
+ Add support for Linux cgroups v2.
+ Add NUMA support for FreeBSD.
+ Add get_last_cpu_location support for FreeBSD.
+ Remove support for Intel Xeon Phi (MIC, Knights Corner) co-processors.
* Tools
+ Add --uid to filter the hwloc-ps output by uid on Linux.
+ Add a GRAPHICAL OUTPUT section in the manpage of lstopo.
* Misc
+ Use the native dlopen instead of libltdl,
unless --disable-plugin-dlopen is passed at configure time.
Version 2.1.0
-------------
* API
+ Add a new "Die" object (HWLOC_OBJ_DIE) for upcoming x86 processors
with multiple dies per package, in the x86 and Linux backends.
+ Add the new HWLOC_OBJ_MEMCACHE object type for memory-side caches.
- They are filtered-out by default, except in command-line tools.
- They are only available on very recent platforms running Linux 5.2+
and uptodate ACPI tables.
- The KNL MCDRAM in cache mode is still exposed as a L3 unless
HWLOC_KNL_MSCACHE_L3=0 in the environment.
+ Add HWLOC_RESTRICT_FLAG_BYNODESET and _REMOVE_MEMLESS for restricting
topologies based on some memory nodes.
+ Add hwloc_topology_set_components() for blacklisting some components
from being enabled in a topology.
+ Add hwloc_bitmap_nr_ulongs() and hwloc_bitmap_from/to_ulongs(),
thanks to Junchao Zhang for the suggestion.
+ Improve the API for dealing with disallowed resources
- HWLOC_TOPOLOGY_FLAG_WHOLE_SYSTEM is replaced with FLAG_INCLUDE_DISALLOWED
and --whole-system command-line options with --disallowed.
. Former names are still accepted for backward compatibility.
- Add hwloc_topology_allow() for changing allowed sets after load().
- Add the HWLOC_ALLOW=all environment variable to totally ignore
administrative restrictions such as Linux Cgroups.
- Add disallowed_pu and disallowed_numa bits to the discovery support
structure.
+ Group objects have a new "dont_merge" attribute to prevent them from
being automatically merged with identical parent or children.
+ Add more distances-related features:
- Add hwloc_distances_get_name() to retrieve a string describing
what a distances structure contain.
- Add hwloc_distances_get_by_name() to retrieve distances structures
based on their name.
- Add hwloc_distances_release_remove()
- Distances may now cover objects of different types with new kind
HWLOC_DISTANCES_KIND_HETEROGENEOUS_TYPES.
* Backends
+ Add support for Linux 5.3 new sysfs cpu topology files with Die information.
+ Add support for Intel v2 Extended Topology Enumeration in the x86 backend.
+ Improve memory locality on Linux by using HMAT initiators (exposed
since Linux 5.2+), and NUMA distances for CPU-less NUMA nodes.
+ The x86 backend now properly handles offline CPUs.
+ Detect the locality of NVIDIA GPU OpenCL devices.
+ Ignore NUMA nodes that correspond to NVIDIA GPU by default.
- They may be unignored if HWLOC_KEEP_NVIDIA_GPU_NUMA_NODES=1 in the environment.
- Fix their CPU locality and add info attributes to identify them.
Thanks to Max Katz and Edgar Leon for the help.
+ Add support for IBM S/390 drawers.
+ Rework the heuristics for discovering KNL Cluster and Memory modes
to stop assuming all CPUs are online (required for mOS support).
Thanks to Sharath K Bhat for testing patches.
+ Ignore NUMA node information from AMD topoext in the x86 backend,
unless HWLOC_X86_TOPOEXT_NUMANODES=1 is set in the environment.
+ Expose Linux DAX devices as hwloc Block OS devices.
+ Remove support for /proc/cpuinfo-only topology discovery in Linux
kernel prior to 2.6.16.
+ Disable POWER device-tree-based topology on Linux by default.
- It may be reenabled by setting HWLOC_USE_DT=1 in the environment.
+ Discovery components are now divided in phases that may be individually
blacklisted.
- The linuxio component has been merged back into the linux component.
* Tools
+ lstopo
- lstopo factorizes objects by default in the graphical output when
there are more than 4 identical children.
. New options --no-factorize and --factorize may be used to configure this.
. Hit the 'f' key to disable factorizing in interactive outputs.
- Both logical and OS/physical indexes are now displayed by default
for PU and NUMA nodes.
- The X11 and Windows interactive outputs support many keyboard
shortcuts to dynamically customize the attributes, legend, etc.
- Add --linespacing and change default margins and linespacing.
- Add --allow for changing allowed sets.
- Add a native SVG backend. Its graphical output may be slightly less
pretty than Cairo (still used by default if available) but the SVG
code provides attributes to manipulate objects from HTML/JS.
See dynamic_SVG_example.html for an example.
+ Add --nodeset options to hwloc-calc for converting between cpusets and
nodesets.
+ Add --no-smt to lstopo, hwloc-bind and hwloc-calc to ignore multiple
PU in SMT cores.
+ hwloc-annotate may annotate multiple locations at once.
+ Add a HTML/JS version of hwloc-ps. See contrib/hwloc-ps.www/README.
+ Add bash completions.
* Misc
+ Add several FAQ entries in "Compatibility between hwloc versions"
about API version, ABI, XML, Synthetic strings, and shmem topologies.
Version 2.0.4 (also included in 1.11.13 when appropriate)
-------------
* Add support for Linux 5.3 new sysfs cpu topology files with Die information.
* Add support for Intel v2 Extended Topology Enumeration in the x86 backend.
* Tiles, Modules and Dies are exposed as Groups for now.
+ HWLOC_DONT_MERGE_DIE_GROUPS=1 may be set in the environment to prevent
Die groups from being automatically merged with identical parent or children.
* Ignore NUMA node information from AMD topoext in the x86 backend,
unless HWLOC_X86_TOPOEXT_NUMANODES=1 is set in the environment.
* Group objects have a new "dont_merge" attribute to prevent them from
being automatically merged with identical parent or children.
Version 2.0.3 (also included in 1.11.12 when appropriate)
-------------
* Fix build on Cygwin, thanks to Marco Atzeri for the patches.
* Fix a corner case of hwloc_topology_restrict() where children would
become out-of-order.
* Fix the return length of export_xmlbuffer() functions to always
include the ending \0.
* Fix lstopo --children-order argument parsing.
Version 2.0.2 (also included in 1.11.11 when appropriate)
-------------
* Add support for Hygon Dhyana processors in the x86 backend,
thanks to Pu Wen for the patch.
* Fix symbol renaming to also rename internal components,
thanks to Evan Ramos for the patch.
* Fix build on HP-UX, thanks to Richard Lloyd for reporting the issues.
* Detect PCI link speed without being root on Linux >= 4.13.
* Add HWLOC_VERSION* macros to the public headers,
thanks to Gilles Gouaillardet for the suggestion.
Version 2.0.1 (also included in 1.11.10 when relevant)
-------------
* Bump the library soname to 15:0:0 to avoid conflicts with hwloc 1.11.x
releases. The hwloc 2.0.0 soname was buggy (12:0:0), applications will
have to be recompiled.
* Serialize pciaccess discovery to fix concurrent topology loads in
multiple threads.
* Fix hwloc-dump-hwdata to only process SMBIOS information that correspond
to the KNL and KNM configuration.
* Add a heuristic for guessing KNL/KNM memory and cluster modes when
hwloc-dump-hwdata could not run as root earlier.
* Add --no-text lstopo option to remove text from some boxes in the
graphical output. Mostly useful for removing Group labels.
* Some minor fixes to memory binding.
Version 2.0.0
-------------
*** The ABI of the library has changed. ***
For instance some hwloc_obj fields were reordered, added or removed, see below.
+ HWLOC_API_VERSION and hwloc_get_api_version() now give 0x00020000.
+ See "How do I handle ABI breaks and API upgrades ?" in the FAQ
and "Upgrading to hwloc 2.0 API" in the documentation.
* Major API changes
+ Memory, I/O and Misc objects are now stored in dedicated children lists,
not in the usual children list that is now only used for CPU-side objects.
- hwloc_get_next_child() may still be used to iterate over these 4 lists
of children at once.
- hwloc_obj_type_is_normal(), _memory() and _io() may be used to check
the kind of a given object type.
+ Topologies always have at least one NUMA object. On non-NUMA machines,
a single NUMA object is added to describe the entire machine memory.
The NUMA level cannot be ignored anymore.
+ The NUMA level is special since NUMA nodes are not in the main hierarchy
of objects anymore. Its depth is a fake negative depth that should not be
compared with normal levels.
- If all memory objects are attached to parents at the same depth,
it may be retrieved with hwloc_get_memory_parents_depth().
+ The HWLOC_OBJ_CACHE type is replaced with 8 types HWLOC_OBJ_L[1-5]CACHE
and HWLOC_OBJ_L[1-3]ICACHE that remove the need to disambiguate levels
when looking for caches with _by_type() functions.
- New hwloc_obj_type_is_{,d,i}cache() functions may be used to check whether
a given type is a cache.
+ Reworked ignoring/filtering API
- Replace hwloc_topology_ignore*() functions with hwloc_topology_set_type_filter()
and hwloc_topology_set_all_types_filter().
. Contrary to hwloc_topology_ignore_{type,all}_keep_structure() which
removed individual objects, HWLOC_TYPE_FILTER_KEEP_STRUCTURE only removes
entire levels (so that topology do not become too asymmetric).
- Remove HWLOC_TOPOLOGY_FLAG_ICACHES in favor of hwloc_topology_set_icache_types_filter()
with HWLOC_TYPE_FILTER_KEEP_ALL.
- Remove HWLOC_TOPOLOGY_FLAG_IO_DEVICES, _IO_BRIDGES and _WHOLE_IO in favor of
hwloc_topology_set_io_types_filter() with HWLOC_TYPE_FILTER_KEEP_ALL or
HWLOC_TYPE_FILTER_KEEP_IMPORTANT.
+ The distance API has been completely reworked. It is now described
in hwloc/distances.h.
+ Return values
- Most functions in hwloc/bitmap.h now return an int that may be negative
in case of failure to realloc/extend the internal storage of a bitmap.
- hwloc_obj_add_info() also returns an int in case allocations fail.
* Minor API changes
+ Object attributes
- obj->memory is removed.
. local_memory and page_types attributes are now in obj->attr->numanode
. total_memory moves obj->total_memory.
- Objects do not have allowed_cpuset and allowed_nodeset anymore.
They are only available for the entire topology using
hwloc_topology_get_allowed_cpuset() and hwloc_topology_get_allowed_nodeset().
- Objects now have a "subtype" field that supersedes former "Type" and
"CoProcType" info attributes.
+ Object and level depths are now signed ints.
+ Object string printing and parsing
- hwloc_type_sscanf() deprecates the old hwloc_obj_type_sscanf().
- hwloc_type_sscanf_as_depth() is added to convert a type name into
a level depth.
- hwloc_obj_cpuset_snprintf() is deprecated in favor of hwloc_bitmap_snprintf().
+ Misc objects
- Replace hwloc_topology_insert_misc_object_by_cpuset() with
hwloc_topology_insert_group_object() to precisely specify the location
of an additional hierarchy level in the topology.
- Misc objects have their own level and depth to iterate over all of them.
- Misc objects may now only be inserted as a leaf object with
hwloc_topology_insert_misc_object() which deprecates
hwloc_topology_insert_misc_object_by_parent().
+ hwloc_topology_restrict() doesn't remove objects that contain memory
by default anymore.
- The list of existing restrict flags was modified.
+ The discovery support array now contains some NUMA specific bits.
+ XML export functions take an additional flags argument,
for instance for exporting XMLs that are compatible with hwloc 1.x.
+ Functions diff_load_xml*(), diff_export_xml*() and diff_destroy() in
hwloc/diff.h do not need a topology as first parameter anymore.
+ hwloc_parse_cpumap_file () superseded by hwloc_linux_read_path_as_cpumask()
in hwloc/linux.h.
+ HWLOC_MEMBIND_DEFAULT and HWLOC_MEMBIND_FIRSTTOUCH were clarified.
* New APIs and Features
+ Add hwloc/shmem.h for sharing topologies between processes running on
the same machine (for reducing the memory footprint).
+ Add the experimental netloc subproject. It is disabled by default
and can be enabled with --enable-netloc.
It currently brings command-line tools to gather and visualize the
topology of InfiniBand fabrics, and an API to convert such topologies
into Scotch architectures for process mapping.
See the documentation for details.
* Removed APIs and features
+ Remove the online_cpuset from struct hwloc_obj. Offline PUs get unknown
topologies on Linux nowadays, and wrong topology on Solaris. Other OS
do not support them. And one cannot do much about them anyway. Just keep
them in complete_cpuset.
+ Remove the now-unused "System" object type HWLOC_OBJ_SYSTEM,
defined to MACHINE for backward compatibility.
+ The almost-unused "os_level" attribute has been removed from the
hwloc_obj structure.
+ Remove the custom interface for assembling the topologies of different
nodes as well as the hwloc-assembler tools.
+ hwloc_topology_set_fsroot() is removed, the environment variable
HWLOC_FSROOT may be used for the same remote testing/debugging purpose.
+ Remove the deprecated hwloc_obj_snprintf(), hwloc_obj_type_of_string(),
hwloc_distribute[v]().
* Remove Myrinet Express interoperability (hwloc/myriexpress.h).
+ Remove Kerrighed support from the Linux backend.
+ Remove Tru64 (OSF/1) support.
- Remove HWLOC_MEMBIND_REPLICATE which wasn't available anywhere else.
* Backend improvements
+ Linux
- OS devices do not have to be attached through PCI anymore,
for instance enabling the discovery of NVDIMM block devices.
- Remove the dependency on libnuma.
- Add a SectorSize attribute to block OS devices.
+ Mac OS X
- Fix detection of cores and hyperthreads.
- Add CPUVendor, Model, ... attributes.
+ Windows
- Add get_area_memlocation().
* Tools
+ lstopo and hwloc-info have a new --filter option matching the new filtering API.
+ lstopo can be given --children-order=plain to force a basic displaying
of memory and normal children together below their parent.
+ hwloc-distances was removed and replaced with lstopo --distances.
* Misc
+ Exports
- Exporting to synthetic now ignores I/O and Misc objects.
+ PCI discovery
- Separate OS device discovery from PCI discovery. Only the latter is disabled
with --disable-pci at configure time. Both may be disabled with --disable-io.
- The `linuxpci' component is now renamed into `linuxio'.
- The old `libpci' component name from hwloc 1.6 is not supported anymore,
only the `pci' name from hwloc 1.7 is now recognized.
- The HWLOC_PCI_<domain>_<bus>_LOCALCPUS environment variables are superseded
with a single HWLOC_PCI_LOCALITY where bus ranges may be specified.
- Do not set PCI devices and bridges name automatically. Vendor and device
names are already in info attributes.
+ Components and discovery
- Add HWLOC_SYNTHETIC environment variable to enforce a synthetic topology
as if hwloc_topology_set_synthetic() had been called.
- HWLOC_COMPONENTS doesn't support xml or synthetic component attributes
anymore, they should be passed in HWLOC_XMLFILE or HWLOC_SYNTHETIC instead.
- HWLOC_COMPONENTS takes precedence over other environment variables
for selecting components.
+ hwloc now requires a C99 compliant compiler.
Version 1.11.13 (also included in 2.0.4)
---------------
* Add support for Linux 5.3 new sysfs cpu topology files with Die information.
* Add support for Intel v2 Extended Topology Enumeration in the x86 backend.
* Tiles, Modules and Dies are exposed as Groups for now.
+ HWLOC_DONT_MERGE_DIE_GROUPS=1 may be set in the environment to prevent
Die groups from being automatically merged with identical parent or children.
* Ignore NUMA node information from AMD topoext in the x86 backend,
unless HWLOC_X86_TOPOEXT_NUMANODES=1 is set in the environment.
* Group objects have a new "dont_merge" attribute to prevent them from
being automatically merged with identical parent or children.
Version 1.11.12 (also included in 2.0.3)
---------------
* Fix a corner case of hwloc_topology_restrict() where children would
become out-of-order.
* Fix the return length of export_xmlbuffer() functions to always
include the ending \0.
Version 1.11.11 (also included in 2.0.2)
---------------
* Add support for Hygon Dhyana processors in the x86 backend,
thanks to Pu Wen for the patch.
* Fix symbol renaming to also rename internal components,
thanks to Evan Ramos for the patch.
* Fix build on HP-UX, thanks to Richard Lloyd for reporting the issues.
* Detect PCI link speed without being root on Linux >= 4.13.
Version 1.11.10 (also included in 2.0.1)
---------------
* Fix detection of cores and hyperthreads on Mac OS X.
* Serialize pciaccess discovery to fix concurrent topology loads in
multiple threads.
* Fix first touch area memory binding on Linux when thread memory
binding is different.
* Some minor fixes to memory binding.
* Fix hwloc-dump-hwdata to only process SMBIOS information that correspond
to the KNL and KNM configuration.
* Add a heuristic for guessing KNL/KNM memory and cluster modes when
hwloc-dump-hwdata could not run as root earlier.
* Fix discovery of NVMe OS devices on Linux >= 4.0.
* Add get_area_memlocation() on Windows.
* Add CPUVendor, Model, ... attributes on Mac OS X.
Version 1.11.9
--------------
* Add support for Zhaoxin ZX-C and ZX-D processors in the x86 backend,
thanks to Jeff Zhao for the patch.
* Fix AMD Epyc 24-core L3 cache locality in the x86 backend.
* Don't crash in the x86 backend when the CPUID vendor string is unknown.
* Fix the missing pu discovery support bit on some OS.
* Fix the management of the lstopoStyle info attribute for custom colors.
* Add verbose warnings when failing to load hwloc v2.0+ XMLs.
Version 1.11.8
--------------
* Multiple Solaris improvements, thanks to Maureen Chew for the help:
+ Detect caches on Sparc.
+ Properly detect allowed/disallowed PUs and NUMA nodes with processor sets.
+ Add hwloc_get_last_cpu_location() support for the current thread.
* Add support for CUDA compute capability 7.0 and fix support for 6.[12].
* Tools improvements
+ Fix search for objects by physical index in command-line tools.
+ Add missing "cpubind:get_thisthread_last_cpu_location" in the output
of hwloc-info --support.
+ Add --pid and --name to specify target processes in hwloc-ps.
+ Display thread names in lstopo and hwloc-ps on Linux.
* Doc improvements
+ Add a FAQ entry about building on Windows.
+ Install missing sub-manpage for hwloc_obj_add_info() and
hwloc_obj_get_info_by_name().
Version 1.11.7
--------------
* Fix hwloc-bind --membind for CPU-less NUMA nodes (again).
Thanks to Gilles Gouaillardet for reporting the issue.
* Fix a memory leak on IBM S/390 platforms running Linux.
* Fix a memory leak when forcing the x86 backend first on amd64/topoext
platforms running Linux.
* Command-line tools now support "hbm" instead "numanode" for filtering
only high-bandwidth memory nodes when selecting locations.
+ hwloc-bind also support --hbm and --no-hbm for filtering only or
no HBM nodes.
Thanks to Nicolas Denoyelle for the suggestion.
* Add --children and --descendants to hwloc-info for listing object
children or object descendants of a specific type.
* Add --no-index, --index, --no-attrs, --attrs to disable/enable display
of index numbers or attributes in the graphical lstopo output.
* Try to gather hwloc-dump-hwdata output from all possible locations
in hwloc-gather-topology.
* Updates to the documentation of locations in hwloc(7) and
command-line tools manpages.
Version 1.11.6
--------------
* Make the Linux discovery about twice faster, especially on the CPU side,
by trying to avoid sysfs file accesses as much as possible.
* Add support for AMD Family 17h processors (Zen) SMT cores in the Linux
and x86 backends.
* Add the HWLOC_TOPOLOGY_FLAG_THISSYSTEM_ALLOWED_RESOURCES flag (and the
HWLOC_THISSYSTEM_ALLOWED_RESOURCES environment variable) for reading the
set of allowed resources from the local operating system even if the
topology was loaded from XML or synthetic.
* Fix hwloc_bitmap_set/clr_range() for infinite ranges that do not
overlap currently defined ranges in the bitmap.
* Don't reset the lstopo zoom scale when moving the X11 window.
* lstopo now has --flags for manually setting topology flags.
* hwloc_get_depth_type() returns HWLOC_TYPE_DEPTH_UNKNOWN for Misc objects.
Version 1.11.5
--------------
* Add support for Knights Mill Xeon Phi, thanks to Piotr Luc for the patch.
* Reenable distance gathering on Solaris, disabled by mistake since v1.0.
Thanks to TU Wien for the help.
* Fix hwloc_get_*obj*_inside_cpuset() functions to ignore objects with
empty CPU sets, for instance, CPU-less NUMA nodes such as KNL MCDRAM.
Thanks to Nicolas Denoyelle for the report.
* Fix XML import of multiple distance matrices.
* Add a FAQ entry about "hwloc is only a structural model, it ignores
performance models, memory bandwidth, etc.?"
Version 1.11.4
--------------
* Add MemoryMode and ClusterMode attributes in the Machine object on KNL.
Add doc/examples/get-knl-modes.c for an example of retrieving them.
Thanks to Grzegorz Andrejczuk.
* Fix Linux build with -m32 with respect to libudev.
Thanks to Paul Hargrove for reporting the issue.
* Fix build with Visual Studio 2015, thanks to Eloi Gaudry for reporting
the issue and providing the patch.
* Don't forget to display OS device children in the graphical lstopo.
* Fix a memory leak on Solaris, thanks to Bryon Gloden for the patch.
* Properly handle realloc() failures, thanks to Bryon Gloden for reporting
the issue.
* Fix lstopo crash in ascii/fig/windows outputs when some objects have a
lstopoStyle info attribute.
Version 1.11.3
--------------
* Bug fixes
+ Fix a memory leak on Linux S/390 hosts with books.
+ Fix /proc/mounts parsing on Linux by using mntent.h.
Thanks to Nathan Hjelm for reporting the issue.
+ Fix a x86 infinite loop on VMware due to the x2APIC feature being
advertised without actually being fully supported.
Thanks to Jianjun Wen for reporting the problem and testing the patch.
+ Fix the return value of hwloc_alloc() on mmap() failure.
Thanks to Hugo Brunie for reporting the issue.
+ Fix the return value of command-line tools in some error cases.
+ Do not break individual thread bindings during x86 backend discovery in a
multithreaded process. Thanks to Farouk Mansouri for the report.
+ Fix hwloc-bind --membind for CPU-less NUMA nodes.
+ Fix some corner cases in the XML export/import of application userdata.
* API Improvements
+ Add HWLOC_MEMBIND_BYNODESET flag so that membind() functions accept
either cpusets or nodesets.
+ Add hwloc_get_area_memlocation() to check where pages are actually
allocated. Only implemented on Linux for now.
- There's no _nodeset() variant, but the new flag HWLOC_MEMBIND_BYNODESET
is supported.
+ Make hwloc_obj_type_sscanf() parse back everything that may be outputted
by hwloc_obj_type_snprintf().
* Detection Improvements
+ Allow the x86 backend to add missing cache levels, so that it completes
what the Solaris backend lacks.
Thanks to Ryan Zezeski for reporting the issue.
+ Do not filter-out FibreChannel PCI adapters by default anymore.
Thanks to Matt Muggeridge for the report.
+ Add support for CUDA compute capability 6.x.
* Tools
+ Add --support to hwloc-info to list supported features, just like with
hwloc_topology_get_support().
- Also add --objects and --topology to explicitly switch between the
default modes.
+ Add --tid to let hwloc-bind operate on individual threads on Linux.
+ Add --nodeset to let hwloc-bind report memory binding as NUMA node sets.
+ hwloc-annotate and lstopo don't drop application userdata from XMLs anymore.
- Add --cu to hwloc-annotate to drop these application userdata.
+ Make the hwloc-dump-hwdata dump directory configurable through configure
options such as --runstatedir or --localstatedir.
* Misc Improvements
+ Add systemd service template contrib/systemd/hwloc-dump-hwdata.service
for launching hwloc-dump-hwdata at boot on Linux.
Thanks to Grzegorz Andrejczuk.
+ Add HWLOC_PLUGINS_BLACKLIST environment variable to prevent some plugins
from being loaded. Thanks to Alexandre Denis for the suggestion.
+ Small improvements for various Windows build systems,
thanks to Jonathan L Peyton and Marco Atzeri.
Version 1.11.2
--------------
* Improve support for Intel Knights Landing Xeon Phi on Linux:
+ Group local NUMA nodes of normal memory (DDR) and high-bandwidth memory
(MCDRAM) together through "Cluster" groups so that the local MCDRAM is
easy to find.
- See "How do I find the local MCDRAM NUMA node on Intel Knights
Landing Xeon Phi?" in the documentation.
- For uniformity across all KNL configurations, always have a NUMA node
object even if the host is UMA.
+ Fix the detection of the memory-side cache:
- Add the hwloc-dump-hwdata superuser utility to dump SMBIOS information
into /var/run/hwloc/ as root during boot, and load this dumped
information from the hwloc library at runtime.
- See "Why do I need hwloc-dump-hwdata for caches on Intel Knights
Landing Xeon Phi?" in the documentation.
Thanks to Grzegorz Andrejczuk for the patches and for the help.
* The x86 and linux backends may now be combined for discovering CPUs
through x86 CPUID and memory from the Linux kernel.
This is useful for working around buggy CPU information reported by Linux
(for instance the AMD Bulldozer/Piledriver bug below).
Combination is enabled by passing HWLOC_COMPONENTS=x86 in the environment.
* Fix L3 cache sharing on AMD Opteron 63xx (Piledriver) and 62xx (Bulldozer)
in the x86 backend. Thanks to many users who helped.
* Fix the overzealous L3 cache sharing fix added to the x86 backend in 1.11.1
for AMD Opteron 61xx (Magny-Cours) processors.
* The x86 backend may now add the info attribute Inclusive=0 or 1 to caches
it discovers, or to caches discovered by other backends earlier.
Thanks to Guillaume Beauchamp for the patch.
* Fix the management on alloc_membind() allocation failures on AIX, HP-UX
and OSF/Tru64.
* Fix spurious failures to load with ENOMEM on AIX in case of Misc objects
below PUs.
* lstopo improvements in X11 and Windows graphical mode:
+ Add + - f 1 shortcuts to manually zoom-in, zoom-out, reset the scale,
or fit the entire window.
+ Display all keyboard shortcuts in the console.
* Debug messages may be disabled at runtime by passing HWLOC_DEBUG_VERBOSE=0
in the environment when --enable-debug was passed to configure.
* Add a FAQ entry "What are these Group objects in my topology?".
Version 1.11.1
--------------
* Detection fixes
+ Hardwire the topology of Fujitsu K-computer, FX10, FX100 servers to
workaround buggy Linux kernels.
Thanks to Takahiro Kawashima and Gilles Gouaillardet.
+ Fix L3 cache information on AMD Opteron 61xx Magny-Cours processors
in the x86 backend. Thanks to Guillaume Beauchamp for the patch.
+ Detect block devices directly attached to PCI without a controller,
for instance NVMe disks. Thanks to Barry M. Tannenbaum.
+ Add the PCISlot attribute to all PCI functions instead of only the
first one.
* Miscellaneous internal fixes
+ Ignore PCI bridges that could fail assertions by reporting buggy
secondary-subordinate bus numbers
Thanks to George Bosilca for reporting the issue.
+ Fix an overzealous assertion when inserting an intermediate Group object
while Groups are totally ignored.
+ Fix a memory leak on Linux on AMD processors with dual-core compute units.
Thanks to Bob Benner.
+ Fix a memory leak on failure to load a xml diff file.
+ Fix some segfaults when inputting an invalid synthetic description.
+ Fix a segfault when plugins fail to find core symbols.
Thanks to Guy Streeter.
* Many fixes and improvements in the Windows backend:
+ Fix the discovery of more than 32 processors and multiple processor
groups. Thanks to Barry M. Tannenbaum for the help.
+ Add thread binding set support in case of multiple process groups.
+ Add thread binding get support.
+ Add get_last_cpu_location() support for the current thread.
+ Disable the unsupported process binding in case of multiple processor
groups.
+ Fix/update the Visual Studio support under contrib/windows.
Thanks to Eloi Gaudry for the help.
* Tools fixes
+ Fix a segfault when displaying logical indexes in the graphical lstopo.
Thanks to Guillaume Mercier for reporting the issue.
+ Fix lstopo linking with X11 libraries, for instance on Mac OS X.
Thanks to Scott Atchley and Pierre Ramet for reporting the issue.
+ hwloc-annotate, hwloc-diff and hwloc-patch do not drop unavailable
resources from the output anymore and those may be annotated as well.
+ Command-line tools may now import XML from the standard input with -i -.xml
+ Add missing documentation for the hwloc-info --no-icaches option.
Version 1.11.0
--------------
* API
+ Socket objects are renamed into Package to align with the terminology
used by processor vendors. The old HWLOC_OBJ_SOCKET type and "Socket"
name are still supported for backward compatibility.
+ HWLOC_OBJ_NODE is replaced with HWLOC_OBJ_NUMANODE for clarification.
HWLOC_OBJ_NODE is still supported for backward compatibility.
"Node" and "NUMANode" strings are supported as in earlier releases.
* Detection improvements
+ Add support for Intel Knights Landing Xeon Phi.
Thanks to Grzegorz Andrejczuk and Lukasz Anaczkowski.
+ Add Vendor, Model, Revision, SerialNumber, Type and LinuxDeviceID
info attributes to Block OS devices on Linux. Thanks to Vineet Pedaballe
for the help.
- Add --disable-libudev to avoid dependency on the libudev library.
+ Add "MemoryModule" Misc objects with information about DIMMs, on Linux
when privileged and when I/O is enabled.
Thanks to Vineet Pedaballe for the help.
+ Add a PCISlot attribute to PCI devices on Linux when supported to
identify the physical PCI slot where the board is plugged.
+ Add CPUStepping info attribute on x86 processors,
thanks to Thomas Röhl for the suggestion.
+ Ignore the device-tree on non-Power architectures to avoid buggy
detection on ARM. Thanks to Orion Poplawski for reporting the issue.
+ Work-around buggy Xeon E5v3 BIOS reporting invalid PCI-NUMA affinity