odp_pktio_config_init(&config); config.parser.layer = ODP_PKTIO_PARSER_LAYER_L2; odp_pktio_config(pktio, &config);
ODP v22.214.171.124 continues the preview of Tiger Moth, introducing new APIs and extensions, as well as numerous bug fixes and functional improvements.
To permit smoother evolution of the ODP API specification, a deprecation framework is introduced to permit controlled deprecation.
When an ODP API or defined struct parameter is deprecated, ODP validation tests will be updated to no longer use that API and instead use the replacement API. By default, attempts to compile with the older API/feature will fail and applications wishing to move to the new ODP release should be updated to use the replacement API. To permit evaluation of new ODP releases in advance of such updating, however, ODP supports the
--enable-deprecated, which makes the obsolete APIs visible again.
This feature will be used on a case-by-case basis and documented in the release notes for each release that introduces replacement API(s). In general the deprecated forms will not be maintained for more than a single release cycle. After that they will no longer be present in the API specification and the replacement forms must be used to compile with that level of the API specification.
A number of new and refined APIs are introduced in crypto, packet parsing, and queue configuration:
The ODP crypto APIs receive several enhancements in this release:
Additional enumerations added for HMAC-SHA-1 and HMAC-SHA-512 authentication.
The following cipher/authentication algorithms have been deprecated in favor of newer replacement algorithms:
ODP_CIPHER_ALG_AES128_CBC is replaced by
ODP_CIPHER_ALG_AES128_GCM is replaced by
ODP_AUTH_ALG_MD5_96 is replaced by
ODP_AUTH_ALG_SHA256_128 is replaced by
ODP_AUTH_ALG_AES128_GCM1 is replaced by `ODP_AUTH_ALG_AES_GCM
odp_crypto_op_params_t is deprecated in favor of
odp_crypto_op_param_t for consistency with other ODP
odp_crypto_session_param_t adds the field
auth_digest_len to permit specification of the authentication digest length to be used for this session. The
odp_crypto_auth_capability() API returns the list of supported digest lengths.
odp_crypto_op_param_t struct adds an optional pointer and length for AAD information. This allows applications to specify AAD information from the list of supported lengths provided by
odp_crypto_data_range_t type is deprecated and renamed to
odp_packet_data_range_t since it can be used to specify ranges for other than crypto purposes.
Applications may now specify the maximum packet layer of interest. For example, a router may not care about anything beyond ISO Layer 3 in packets. This can be used by ODP implementations to control the depth of packet parsing needed by the application and may allow greater efficiency, especially in software implementations.
This is controlled by a new
odp_pktio_parser_layer_t enum that is part of the new
odp_pktio_parser_config_t struct that is added to the
odp_pktio_config_t struct used by the
odp_pktio_config() API. The supported parser layers are also returned in this struct as part of the
odp_pktio_capability_t struct returned by the
odp_queue_capability_t struct returned by the
odp_queue_capability() API is enhanced as follows: * The
max_queues field is now defined to return the maximum number of event queues of any type. * New sub-structs (
sched) are added that detail the
max_num of queues of that type supported as well as the new field
max_size that specifies the maximum number of elements that each queue of this type can store. A value of zero for
max_num indicates no fixed limit.
In addition, the
odp_queue_param_t passed to
odp_queue_create() now adds a
size field to allow applications to specify the minimum number of events that this queue should be able to store. A value of zero specified requests that the implementation default limits be used.
The ODP examples have been updated to show this configuration, for example, the
l2fwd_simple example does Layer 2 forwarding and hence doesn’t need packets to be parsed beyond Layer 2. So prior to opening an interface via
odp_pktio_open() the configuration processing now includes code of the form:
odp_pktio_config_init(&config); config.parser.layer = ODP_PKTIO_PARSER_LAYER_L2; odp_pktio_config(pktio, &config);
This serves as a hint to the ODP implementation that parsing beyond Layer 2 is not required on this interface.
odp_time_to_u64() API is removed without deprecation in this release. This is redundant since the
odp_time_to_ns() API already returns a
uint64_t value for
odp_time_t and can be used for the same purpose.
For debugging / diagnostic use, the
odp_sys_info_print() API is added. This prints implementation defined information about the system and ODP environment and may contain information about CPUs, memory, and other hardware configuration.
ODP helper functions fall into two categories: system-independent, and those that rely on Linux. For backwards compatibility, these have been reorganized into a new
helper/linux directory that is installed only when the
configure option is specified.
The default scheduler is streamlined by using precomputed weight tables and separated priority queues for different scheduling groups. This improves both latency and scalability.
Also included in this change, the default number of scheduling groups is lowered from 256 to 32, which experience has shown is sufficient for most applications.
The scheduler fairness checks are also enhanced to avoid low priority event starvation if
CONFIG_BURST_SIZE is set to 1.
Errors in implicit packet copy operations performed during crypto operation are now handled properly.
odp_crypto_session_create() fails, proper cleanup is now performed to avoid memory leaks.
The auth digest len is now used when calculating HMACs, and full-length digests are now added to supported SHA capabilities.
Numerous crypto functions have been rewritten to use the OpenSSL
EVP_ functions for improved efficiency and accuracy.
The packet parser now recognizes ICMPv6 packets in addition to ICMPv4.
socket drivers add additional initializations to avoid valgrind warnings.
dpdk driver is upgraded to DPDK 17.02 and is now also built with the
--whole-archive option, which means that PMDs no longer need to be linked individually but are automatically included in builds that make use of DPDK pktio support.
The ODP Time APIs are now more efficiently handled by replacing the previous Linux timespec with simple nanoseconds (ns) and using native hardware time counters in x86 and ARM environments, when available.
odp-linuxTraffic Manager Improvements
Weighting is now handled properly when weight=1 is specified. Previously this caused an overflow that distorted packet priorities.
ARMv8 compilation now works properly when using the clang compiler.
odp_scheduling performance test now handles dequeueing from potentially concurrent queues properly.
The traffic manager and time tests are now invoked via scripts to better account for load-sensitivity when running regressions in CI environments.
The l2fwd test now supports an additional parameter to specify the number of scheduling groups to use in the test.
odp_sched_latency performance test now handles queue draining in a robust manner.
The crypto validation tests now properly check and validate message digests, and include negative tests to verify that incorrect digests are properly flagged. Note that this may expose omissions in other ODP implementations that had previously passed this validation test.
The crypto validation test now adds an explicit test for the NULL cipher, as well as HMAC-SHA-1 and HMAC-SHA-512.
The pktio_ipc test now properly cleans up only its own temp files.
odp_generator example now properly honors stop criteria based on number of packets sent.
odp_generator example now properly flushes output messages
odp_generator example now supports port configuration.
example/generator/odp_generator.c contains todo items
Error handling issues (CHECKED_RETURN)
Unchecked return in pool.c
Unchecked return in mmap_unmap_sock()
ODP_STATIC_ASSERT() fails when used by C++
odp_pktio_ordered_run.sh: line 34: integer expression expected
load sensitive tests fail on CI
odp_crypto_operation() routine does not work with multi-segment packets.
Packet validation test fails if implementation does not limit packet length
odph_iplookup_table_put_value() uses overlapping pointer addresses
Miss to call unlock if there are some errors happen in loopback_send() function
odp_packet_seg_t fails ABI compatibility between odp-linux and odp-dpdk
Compilation fails using clang 4.0.0
doxygen errors and travis does not catch them
TM validation test does find traffic_mngr_main
odp_rwlock_read_trylock() fails if lock is already held for read access
Packet order lost when enqueuing to pktout queue
AES-GCM returns 'valid' tag when checking invalid tag
Various failures if CONFIG_PACKET_MAX_SEGS is set to 1
Travis: time main test out of boundaries
Compilation failures using GCC 7 series
Socket pktio recv fails on large number of packet
ODP v126.96.36.199 represents another preview of the Tiger Moth release series and introduces new APIs and extensions.
Packet references are a lightweight mechanism to allow applications to create and manipulate different "views" of packets. These views consist of shared bytes common to all references created on the same
odp_packet_t, possibly prefixed with unique headers that are private to each reference. Five new APIs are introduced to enable this feature:
Static references allow a single packet to have multiple "aliases", all of which must be treated as read only. This is useful, for example, to retain a reference to a packet being transmitted to support retransmit processing, since the actual storage represented by a packet is not released until all references to it have been freed via
Dynamic references differ from static references is that they permit the individual
odp_packet_t handles to have unique prefixes created via
odp_packet_extend_head() calls. This can be used, for example, to support multicasting packets to different destinations by creating packets that consist of unique headers followed by a common shared payload.
odp_packet_ref(), but creates a dynamic reference by prepending a preexisting header onto another packet.
Returns a boolean indicator of whether a given
odp_packet_t has other references that share bytes with this packet.
Returns the number of unshared bytes accessible through a given
odp_packet_t handle. These are the only bytes that should be changed. All other bytes in the packet should be treated as read only as they are shared with other
Note that while the packet reference APIs and associated validation tests are present in this release, the
odp-linux reference implementation currently implements references via packet copying. A zero-copy implementation of packet references is planned to be part of the ODP v188.8.131.52 release.
ODP has supported an Application Binary Interface (ABI) that permits applications to be generated that are binary portable between select ODP implementations. This is now formalized with the addition of structures that permit ABI specifications to be defined that are shared between ODP implementations. ODP provides a default ABI specification that is the same as was provided before. This change means that additional ABIs may be defined that are optimized to collections of platforms that share an Instruction Set Architecture (ISA) and subscribe to them.
ABI specifications live in the
Adding to the range of scheduler implementations supported by
odp-linux, a new scheduler, the instance query scheduler, is available by specifying
This scheduler uses sparse bitmaps and offers scalability advantages when dealing with large numbers of schedule queues. It otherwise offers performance comparable to the default ODP scheduler implementation.
Helpers have been reorganized to provide better independence from odp-linux and to make them more useful with other ODP implementations. These reorganizations are functionally transparent to ODP users but should simplifying packaging and porting to other ODP implementations. This includes adding the "umbrella" include file
odph_api.h which can be used to include all helper API definitions in an application.
odp-linux reference implementation now supports Pattern Matching Rules (PMRs) for IPv6 addresses, inner and outer VLAN IDs, and inner and outer Ethernet types.
odp-linux reference implementation now offers improved inlining support for ODP APIs for applications compiled against ODP configured with the
--enable-abi-compat=no option, meaning they wish to forego binary compatibility in exchange for improved performance. These applications remain source portable to other ODP implementations.
odp_cpu_pause()for ARM processors
A native implementation of the
odp_cpu_pause() API has been added for ARMv7 and ARMv8 processors.
odp_packet_bench microbenchmark application has been added to the test performance directory to allow implementations to measure and calibrate the performance of individual ODP packet APIs.
odp_pktio_ordered application has been added to the test performance directory to provide stress-testing of packet ordering features of ODP.
In addition to expanded documentation related to the new packet reference APIs, a section on applicatin portability has been added that discusses the types of portability offered by ODP and the tradeoffs that application writers should consider when using ODP.
hello.c application can now run properly if Core 0 is not available (any available core will be used).
Provide proper return code checking within _ishm.c
Remove unused variables in iplookuptable helper routine.
Avoid memory leaks on error paths in the cuckoo table helper functions.
Fixes a race condition in shared memory allocation.
Provide proper fallback for shared memory when hugepages are not available.
Avoid null pointer dereference in the iplookuptable helper routine.
Missing doxygen documentation for helper table functions are added.
ODP v184.108.40.206 represents the initial preview of the Tiger Moth release series and as such introduces new APIs and extensions that will be built on as this release matures.
Many ODP APIs take parameter structs of type
odp_xxx_param_t. The crypto APIs, for historical reasons, failed to follow this convention, using instead structs of type
odp_crypto_params_t, etc. These pluralized names are now deprecated and their singular forms are introduced as the preferred names for these structs. The old names are retained (for now) to ease migration, however applications should convert to the new forms at their convenience as these deprecated forms will be removed in the final Tiger Moth release.
The changes introduced for this include:
To provide a more flexible programming for handling all possible key/digest/iv length combinations, the enums used for crypto specification are split to decouple lengths from algorithm names. The only exception is the SHA-2 family of hash routines, which have well-established naming conventions that incorporate digest lengths (SHA-224, SHA-256, etc.)
Changes included with this restructure include:
odp_crypto_capability_t structure returned by the
odp_crypto_capability() API contains streamlined
odp_crypto_cipher_capability() API is added to return detailed information about available cipher capabilities.
odp_crypto_auth_capability() API is added to return detailed information about available authentication capabilities.
For completeness the
odp_crypto_session_param_init() API is provided to enable platform-independent initialization of the
odp_crypto_session_param_t structure used as input to
ODP_BITFIELD_ORDER define is added to the ODP specification to parallel the existing
ODP_BYTEFIELD_ORDER define. This will be set to the value
ODP_LITTLE_ENDIAN_BITFIELD. This also addresses Bug 2402, however since fixing this required a small API change this was deferred until an API release boundary.
The use of name arguments to the various resource creation APIs has been standardized and documentation improved to clarify that unique names are not required and that these may be specified as NULL for anonymous resource creation. When non-unique resource names are used, it is unspecified which of these are returned by a corresponding lookup API.
odp_pool_param_t structure adds the new field
max_len to be used in packet pools to advise the implementation of the maximum sized packet that the application will allocate with a single
odp_packet_alloc() call. This may enable storage pool optimization.
API documentation for
odp_packet_copy_from_pkt() is clarified to specify that the source and destination packets supplied to these APIs should not refer to the same packet.
API documentation for
odp_packet_alloc() is clarified to specify that the supplied length for requested packet allocation should be greater than zero.
The APIs provided for working with random data have been revised. The third parameter to
odp_random_data() is now of type
odp_random_kind_t, which is an
enum that is used to specify the quality of random data required. The kinds of random data defined are:
No specific quality guarantees. This is assumed to be pseudo-random data generated by software where speed of generation is more important than the quality of the results.This is the lowest kind of random.
Random data suitable for use in cryptographic operations.
True random data generated from a hardware entropy source. This is the highest kind of random.
odp_random_max_kind() API is provided that returns the highest kind of data available on this implementation. Requests for higher kinds than can be supplied will fail.
For testing purposes it is often desirable to generate "random" sequences that are repeatable. To support this use case, the
odp_random_test_data() API is introduced. This always returns BASIC random data but uses a user-supplied 64-byte seed parameter that is update for each call and can be used to repeat the same sequence as needed.
odp_shm_reserve() API adds two new additional flags to support external memory.
ODP_SHM_SINGLE_VA guarantees that all ODP threads sharing this memory will see the block at the same virtual address regardless of whether threads are implemented as pthreads or processes and when
fork() calls are made to create them.
ODP_SHM_EXPORT allows the memory block to be visible to other ODP instances. Other ODP instances can retrieve this block via the new
The relationship between classification and queue configuration in the
odp_pktin_queue_param_t structure is clarified to emphasize that classification subsumes queue-based I/O processing. This is an API documentation change only.
New helper APIs are introduced for IP table lookup support for longest prefix matching as well as cuckoo hash tables. These are designed to provide analogs to functions available in DPDK to assist applications being ported to ODP.
The odp-linux reference implementation includes a number of improvements to make it more suitable for production use on platforms that rely on software implementations of key ODP APIs.
Storage pools used for buffers and packets are now implemented via lockless ring structures that support burst mode read/writes to local caches for significantly improved multi-core scalability
The layout of the structs used to support buffers and packets has been optimized to reduce cache footprint and minimize path lengths in packet manipulation.
The implementation of ordered queues has been streamlined and made more scaleable in multi-core systems.
The more advance segmentation capabilities present in the new ODP packet implementation are used to streamline the implementation of APIs like
odp_packet_concat() and the head/tail extend/trunc APIs.
A number of "todos" were removed from the packet validation test suite.
The CPU affinity is now correctly read from the cpuset.
The PktIO validation test no longer uses invalid MAC addresses.
The TCP checksum is now properly calculated for generated packets.
The odp-linux reference implementation makes use of the OpenSSL library to support the
odp_random_xxx() APIs and some crypto operations. To support OpenSSL versions prior to 1.1.0, which are not thread safe, support is added for OpenSSL locking callbacks that use ODP ticketlocks to provide OpenSSL thread safety.
Make check fails on a single core VM in the process mode helper test.
ODP v220.127.116.11 has no API changes from previous v1.11.0 Monarch LTS. Version is increased in current development release to make room for Monarch updates numbers.
Support is added to enable ODP applications to be binary compatible across different implementations of ODP sharing the same Instruction Set Architecture (ISA). This support introduces a new
no abi disable option
This is the default and specifies that the ODP library is to be built to support ABI compatibility mode. In this mode ODP APIs are never inlined. ABI compatibility ensures maximum application portability in cloud environments.
Specify this option to enable the inlining of ODP APIs. This may result in improved performance at the cost of ABI compatibility and is suitable for applications running in embedded environments.
Note that ODP applications retain source code portability between ODP implementations regardless of the ABI mode chosen. To move to a different ODP application running on a different ISA, code need simply be recompiled against that target ODP implementation.
The ODP classifier adds support for recognizing Stream Control Transmission Protocol (SCTP) packets. The APIs for this were previously not implemented.
ODP no longer has a dependency on Linux headers. This will help make the odp-linux reference implementation more easily portable to non-Linux environments.
The odp-linux implementation has been made independent of the helper library to avoid circular dependency issues with packaging. Helper functions may use ODP APIs, however ODP implementations should not use helper functions.
test directory has been reorganized to better support a unified approach to ODP component testing. API tests now live in
test/common_plat/validation/api instead of the former
test/validation. With this change performance and validation tests, as well as common and platform-specific tests can all be part of a unified test hierarchy.
The resulting test tree now looks like:
test ├── common_plat │ ├── common │ ├── m4 │ ├── miscellaneous │ ├── performance │ └── validation │ └── api │ ├── atomic │ ├── barrier │ ├── buffer │ ├── classification │ ├── cpumask │ ├── crypto │ ├── errno │ ├── hash │ ├── init │ ├── lock │ ├── packet │ ├── pktio │ ├── pool │ ├── queue │ ├── random │ ├── scheduler │ ├── shmem │ ├── std_clib │ ├── system │ ├── thread │ ├── time │ ├── timer │ └── traffic_mngr ├── linux-generic │ ├── m4 │ ├── mmap_vlan_ins │ ├── performance │ ├── pktio_ipc │ ├── ring │ └── validation │ └── api │ ├── pktio │ └── shmem └── m4
The maximum number of pools that may be created in the odp-linux reference implementation has been raised from 16 to 64.
The DPDK pktio support in odp-linux has been upgraded to work with DPDK 16.07. A number of miscellaneous fixes and performance improvements in this support are also present.
Packet I/O interfaces operating in TAP mode now can feed packets to the ODP classifier the same as other pktio modes can do.
The scheduler and pktio components have been reworked to use burst-mode buffer allocation/deallocation, yielding a measurable performance gain in almost all cases.
ODP queues internally now attempt to use burst-mode enq/deq operations to accelerate performance where applicable.
The ODP scheduler has been enhanced to use ring-based priority queues, resulting in significantly better scalability in many core environments.
ODP now supports the Travis framework needed to trigger CI automation in conjunction with GitHub. This support is considered experimental for now.
A new example application is provided that illustrates use of ODP for simple Layer 3 forwarding across multiple interfaces.
ODP now generates "pure" (implementation independent) doxygen documentation in addition to the specific documentation for the odp-linux implementation. The pure version is applicable to any ODP implementation as it simply describes the ODP API specification. Implementation-specific versions of this documentation describe both the APIs as well as specifics concerning typedefs, enums, etc. This should help clarify what aspects of ODP are platform independent.
The definition of an ODP thread in odp-linux has been clarified to specify that for this implementation ODP threads are Linux pthreads or Linux processes. Currently threads as processes is considered experimental in odp-linux.
Numerous refinements have been incorporated to make validation tests more robust in API coverage as well as correcting corner cases in the implementation of many ODP APIs. Notable fixes include:
ODP_TIMEOUT_INVALID is now defined consistently with other pool elements so the restriction on using Pool 0 as a timer pool is removed.
odp_packet_copy() API now correctly handles user areas between pools that are configured with different sized per-packet user area definitions.
Corrects the implementation of AES GCM decryption in the ODP crypto API.
The Timer validation test fails sporadically in environments with high core counts.
ODP v1.11.0 is the base tag and branch for the Monarch LTS (Long Term Support) release of ODP.
As part of the final Monarch LTS API set, a minor change to the
odp_tm_egress_t struct was made to better reflect the capabilities of SoC platforms targeting Monarch support. This change adds the boolean
egress_fcn_supported that indicates whether TM systems support an egress function. In addition, each TM system is now associated with a PktIO rather than a PktOUT queue. This struct is input to the
odp_tm_create() API and output from the
Building on the modular scheduler framework introduced in v18.104.22.168, An alternate Strict Priority (SP) scheduler is now available. The SP scheduler is selected when ODP is configured with the
The SP scheduler is designed to favor low-latency processing of high priority work at the expense of throughput. This is considered experimental code at this point and should be treated as such by those wishing to use it.
The scheduler now properly cleans up PktIOs operating in SCHEDULE mode following
odp_pktio_close() calls. This resolves Bug 2301.
The odph_chksum() helper routine is now C++ conformant. This resolves Bug 2302.
odp_packet_copy() API now copies the packet user area as part of its processing and the packet validation test has been enhanced to verify that this is done properly. This resolves Bug 2310.
The internal definition of
ODP_TIMEOUT_INVALID was changed in
odp-linux to enable the use of Pool 0 as a timeout pool. This resolves Bug 2316.
To facilitate API tracking,
libodphelper.so has been split out from
To avoid circular dependencies that cause issues when packaging ODP as a shared library, the
odp-linux implementation no longer makes and use of the ODP helper library.
Performance enhancements in the
odp-linux reference implementation have been made in PktIO routines and the packet classifier.
General cleanup throughout has resulted in adding proper termination calls to ODP examples as well as miscellaneous Doxygen corrections. Additionally, the
odp-linux code base has been cleaned up by removing "To Dos" as well as extraneous
#includes for extra C headers and dependencies on linux headers for improved portability.
The Queue validation test now properly exercises the
odp_queue_capability() API and attempts to create the maximum reported number of supported queues.
The platform-specific tests have been moved from
test/platform/linux-generc so that all tests are now found under a single
examples directory has been cleaned up and numerous corrections to existing examples have been made to add proper termination paths, etc. In addition, a new "hello world" example (
odp_hello.c) has been added that illustrates the basic startup and shutdown steps needed for all ODP applications. As a simple stand-alone application is is also a good initial build tests for new ODP implementations.
The Doxygen API guide has been split so that both a "pure" version that is platform-independent and retains unresolved ODP abstract types as well as an implementation-specific version (for
odp-linux) that shows platform-specific
The ODP Implementer’s Guide has been enhanced with a section on implementation considerations, including issues surrounding the definition of Application Binary Interfaces (ABIs).
The timer validation tests have seen occasional failures when run on systems containing a larger number of CPUs (typically 24 or more).
ODP cannot be compiled using the -m32 option to generate 32-bit code on a 64-bit platform when using GCC 4.9 (the default GCC found in Ubuntu 15.04). This is due to a known bug in GCC 4.9 and is closed as a permanent restriction.
Doxygen generates a warning for
ODP_BIG_ENDIAN_BITFIELD when compiling on little endian systems. A similar warning for
ODP_LITTLE_ENDIAN_BITFIELD is issued when compiling on big endian systems.
The traffic manager cannot be used with two PktIOs simultaneously. That is,
odp-linux does not properly support applications that create more than one TM system. This is a bug in the
odp-linux implementation that will be corrected. It is not a limit of the architecture or other ODP implementations.
ODP v22.214.171.124 is a maintenance release and as such introduces no new APIs or other changes that might result in application source incompatibility with v126.96.36.199.
The ODP scheduler included as part of the
odp-linux reference implementation has been modularized to support a "pluggable" architecture that will permit the easy introduction of alternate scheduler implementations that permit both easy experimentation as well as alternate scheduling models that are tuned to specific application workloads (i.e., a strict priority scheduler for latency-sensitive workloads). Included in this release is the just the foundation and alternate schedulers are expected to be added in future ODP releases.
While the platform name within the ODP git repository remains
linux-generic, the package name of this reference implementation has been changed to
odp-linux to better reflect that this is an implementation of ODP that is dependent only on the Linux kernel and is intended to be runnable on any Linux distribution. All ODP documentation has been changed to reflect this name change.
The current helper APIs for linux pthreads (
odph_linux_pthread_create(), etc.) and processes (
odph_linux_process_fork(), etc.) have been augmented with a new "agnostic" set of helper routines for general ODP thread management.
odph_odpthreads_join() are now the preferred helpers to use for creating and joining threads that may be implemented as either pthreads or Linux processes. Although currently ODP threads in Monarch are assumed to share the same (single) address space, this change is to permit evolution towards multi-address space (i.e., process oriented) threading models without requiring application and/or validation test changes.
The various ODP examples and validation tests that make use of threading have all been changed to new these new helper APIs.
As part of the new "agnostic" threading support, two additional helper APIs (
odph_odpthread_setaffinity()) have been added to permit easy management of thread affinity.
The CUnit framework used by the ODP validation suite has been changed to set the affinity of the initial thread to the first available control CPU. This avoids inconsistencies in a number of timing tests.
As a maintenance release, numerous bugs have been fixed in the
odp-linux reference implementation in areas such as platform support (particularly on 32-bit systems), compiler support (clang), C++ compatibility, and other cleanup items. Highlights include:
configure utility now correctly identifies and sets variables needed for proper compilation on 32-bit x86 systems. In addition the Traffic Manager now executes properly on 32-bit systems.
odp_timer_t abstract type is now strongly typed for consistency with other ODP types, and the
odp_timer_pool_to_u64() APIs are now properly implemented. In addition, an issue with compiling the timer routines on 32-bit systems using clang was resolved.
The default scheduler has been improved to avoid starvation and increase fairness when running with a limited number of threads or CPUs.
-mcx16 compiler option is now properly identified and used to support 128-bit atomics on systems that support these operations. This leads to increased efficiency in the implementation of both timers as well as other atomic operations.
In systems that support multiple hugepage sizes, the default hugepage size is now reported properly by the
Numerous issues identified by the Coverity scan tool have been cleaned up and resolved, leading to improved robustness in the
odp-linux reference implementation. In addition, several memory leaks identified by the valgrind tool have been fixed.
The Traffic Manager validation test has certain sub-tests that require a minimum of 2 CPUs to operate properly. These tests are now skipped with a warning when run on uniprocessor systems.
Performance enhancements in the
odp-linux reference implementation have been made in packet processing, classification, and pktio, leading to increased observed throughput and packet handling rates.
l2fwd_simple example has been added that does simple Layer 2 forwarding.
To get better formatting capabilities and future extensibility the ODP user documentation system has been switched from AsciiDoc to AsciiDoctor. There are a handful of notable changes as a result of this. Those submitting documentation patches should be aware of the following:
monospace font is now indicated by demarking the text with backticks (`) rather than plus signs (+).
Callouts are now indicated by C++-style double slash comments (// <1>) instead of C-style comments (/* <1> */). So, for example writing
[source,c] ---- ...some great code deserving a callout // <1> ---- <1> This is an example of a callout
...some great code deserving a callout (1)
This is an example of a callout
Note that this change only affects user documentation. Code documentation still uses Doxygen.
The images in the user guide have been trimmed to fit the page better. In addition, many new images have been added to better illustrate ODP API usage.
The ODP User’s Guide has been updated to include new sections documenting the use of the full Monarch packet APIs as well as the Timer APIs. In addition, the crypto, classification, and traffic manager API documentation has been improved to cover all of the latest Monarch features, and an introductory section on overall ODP packet flow architecture has been added.
The ODP Helper library now has its own document that describes these additional functions of use to ODP applications and validation tests.
The Process Guide, FAQ, CONTRIBUTING, and CHANGELOG files have been reworked for the new AsciiDoctor structure, leading to a more uniform method of presenting ODP support documentation. In addition, an option for generating both a "pure" ODP API document that defines the APIs in their implementation-independent forms as well as their implementation-dependent forms for the
odp-linux reference implementation is now available.
Move to capabilite structures: The classification, crypto, pktio, pool, queue, shared memory, and traffic manager areas all add new APIs to query implementation-specific capability limits for enhanced program portability.
Addtion of a structure that defines system level classification capability
Addition of range PMRs to complement the existing value PMRs to permit application to specifiy classification rules over a range of values.
Provides a way to get the available cipher and authentication algorithms.
Adds the ODP_STATIC_ASSERT() API to permit compile-time assertions.
Rename and add new packet copy and move functionality.
Add packet prefetch API for performance optimization.
New APIs to permit packet headroom and tailroom to be extended to additional segments or truncated as needed.
Align an area of packet data (e.g. IP/UDP headers) so that it is contiguous in memory and starts in a specified minimum alignment.
Add packet time stamp metadata support.
Add packet input index metadata support to allow application context to be anchored from the associated interface that received the packet.
Deprecation and removal of segment-level buffer APIs that are now superseded by additional packet-level manipulation APIs discussed above.
Replaced config definition for maximum pktio entries with maximum packet IO index call
Added the classify_enable bit to the odp_pktin_queue_param_t that allows applications to explicity control which pktin queues are subject to full classifier support.
Addition of pktin configuration options to control packet timestamping and checksum validation processing.
Addition of pktout configuration options to control packet checksum offload processing.
Add the ability to query (via capabilties) whether a pktio interface supports operating in loopback mode and if so to enable/disable this mode of operation.
Round out the polling APIs be adding the ability to receive packets in poll mode from one or more pktin queues with timeout.
Add the ability to set the pktio interface index for ease of setting up application context areas associated with each pktio.
Add the ability to inqure the timestamp resolution associated with pktio interfaces that support packet timestamping.
Add a queue capability API to query system-wide queue capabilities and limits.
Extend queue context with an explicit data length parameter that serves as a performance hint for the amount of context to prefetch when the scheduler selects an event from a scheduled queue.
Add the ability to query information about a defined scheduler group
Add a capability inquiry API to obtain implementation shared memory limits.
Add a capability inquiry API to obtain implementation traffic mngr limits.
Split TOS marking into two separate calls.
Add new APIs to support VLAN, ECN, and drop precedence marking.
Add destroy APIs for shapers, scheduler profiles, threshholds, WRED profiles, TM queues, and TM nodes for symmetry and completeness to allow applictions to terminate gracefully without resource leakage.
Add the ability to disconnect TM queues from their fanouts.
Add TM node contexts to permit applications to anchor user context areas to TM nodes.
Add the ability to query info about TM node fanins and TM queues.
Deprecate and remove the odp_tm_periodic_update() API
More complete and correct checksum implementation
A focus has been made on improving the packaging support of ODP for distributions such as Debian.
Improved creation of source tar ball and packaging scenarios moved to https://git.linaro.org/lng/odp-packaging.git
Renamed libodp to libodp-linux
Removed all internal functions from leaking through the libodp-linux
Time and Traffic Manager validation tests sometimes fail on heavy loaded systems. This behaviour depends on time accuracy measurements, which depends on system load.