> -----Original Message----- > From: David Marchand <david.march...@redhat.com> > Sent: Thursday, October 1, 2020 6:16 PM > To: Dumitrescu, Cristian <cristian.dumitre...@intel.com> > Cc: dev <dev@dpdk.org>; Thomas Monjalon <tho...@monjalon.net> > Subject: Re: [PATCH v7 00/42] Pipeline alignment with the P4 language > > On Thu, Oct 1, 2020 at 12:20 PM Cristian Dumitrescu > <cristian.dumitre...@intel.com> wrote: > > > > This patch set introduces a new pipeline type that combines the DPDK > > performance with the flexibility of the P4-16 language[1]. The new API > > can be used either by itself to code a complete software switch (SWX) > > or data plane app, or in combination with the open-source P4 compiler > > P4C [2], potentially acting as a P4C back-end, thus allowing the P4 > > programs to be translated to the DPDK API and run on multi-core CPUs. > > > > Main new features: > > > > * Nothing is hard-wired, everything is dynamically defined: The packet > > headers (i.e. protocols), the packet meta-data, the actions, the > > tables and the pipeline itself are dynamically defined instead of > > having to be selected from a pre-defined set. > > > > * Instructions: The actions and the life of the packet through the > > pipeline are defined with instructions that manipulate the pipeline > > objects mentioned above. The pipeline is the main function of the > > packet program, with actions as subroutines triggered by the tables. > > > > * Call external plugins: Extern objects and functions can be defined > > to call functionality that cannot be efficiently implemented with > > the existing pipeline-oriented instruction set, such as: special > > error detecting/correcting codes, crypto, meters, stats arrays, > > heuristics, etc. > > > > * Better control plane interaction: Transaction-oriented table update > > mechanism that supports multi-table atomic updates. Multiple tables > > can be updated in a single step with only the before and after table > > sets visible to the packets. Alignment with P4Runtime [3]. > > > > * Performance: Multiple packets are in-flight within the pipeline at > > any moment. Each packet is owned by a different time-sharing thread > > in run-to-completion, with the thread pausing before memory access > > operations such as packet I/O and table lookup to allow the memory > > prefetch to complete. The instructions are verified and translated > > at initialization time with no run-time impact. The instructions are > > also optimized to detect and "fuse" frequently used patterns into > > vector-like instructions transparently to the user. > > > > API deprecation and maturing roadmap: > > * The existing pipeline stable API (rte_pipeline.h) to be deprecated > > prior to and removed as part of the DPDK 21.11 LTS release. > > * The new SWX pipeline experimental API (rte_swx_pipeline.h) to mature > > and become stable as part of the same DPDK 21.11 LTS release. > > > > V7 changes: > > * Set copyright year to 2020 for all new files. > > * Fixed two Doxygen warnings. > > > > V6 changes: > > * Fixed issues in the example app Makefile. > > * Used rte_eth_link_speed_to_str() in the example app. > > * Added release notes update. > > > > V5 changes: > > * Upper case abberviations in some commit titles. > > * Added new example app in the MAINTAINERS file. > > * Absolutely no code changes. > > > > V4 changes: > > * Spell check fixes. > > > > V3 changes: > > * Removed the library Makefile support to align with the latest DPDK. > > > > V2 changes: > > * Updated the title and commit messages to reflect the introduction of > > the new SWX pipeline type. > > * Added the API deprecation and maturing roadmap to the cover letter. > > * Added support for building the SWX pipeline based on specification > > file with syntax aligned to the P4 language. The spec file may be > > generated by the P4C compiler in the future (see patch 32). Reworked > > the examples accordingly (see patches 39, 40 and 41). > > * Added support for the SWX sink port (used for packet drop or log) > > when PCAP library is disabled from the build. > > * Added checks to the application CLI commands to prevent execution > > when dependencies of the current command have previously failed (see > > patch 38). > > * Fixed build warning for 32-bit targets due to the printing of 64-bit > > statistics counters (see patch 38). > > > > [1] P4-16 specification: https://p4.org/p4-spec/docs/P4-16-v1.2.1.pdf > > [2] P4-16 compiler: https://github.com/p4lang/p4c > > [3] P4Runtime specification: > > https://p4.org/p4runtime/spec/v1.2.0/P4Runtime-Spec.pdf > > > > Cristian Dumitrescu (41): > > pipeline: add new SWX pipeline type > > pipeline: add SWX pipeline input port > > pipeline: add SWX pipeline output port > > pipeline: add SWX headers and meta-data > > pipeline: add SWX extern objects and funcs > > pipeline: add SWX pipeline action > > pipeline: add SWX pipeline tables > > pipeline: add SWX pipeline instructions > > pipeline: add SWX Rx and extract instructions > > pipeline: add SWX Tx and emit instructions > > pipeline: add header validate and invalidate SWX instructions > > pipeline: add SWX move instruction > > pipeline: add SWX DMA instruction > > pipeline: introduce SWX add instruction > > pipeline: introduce SWX subtract instruction > > pipeline: introduce SWX ckadd instruction > > pipeline: introduce SWX cksub instruction > > pipeline: introduce SWX and instruction > > pipeline: introduce SWX or instruction > > pipeline: introduce SWX XOR instruction > > pipeline: introduce SWX SHL instruction > > pipeline: introduce SWX SHR instruction > > pipeline: introduce SWX table instruction > > pipeline: introduce SWX extern instruction > > pipeline: introduce SWX jump and return instructions > > pipeline: add SWX instruction description > > pipeline: add SWX instruction verifier > > pipeline: add SWX instruction optimizer > > pipeline: add SWX pipeline query API > > pipeline: add SWX pipeline flush > > pipeline: add SWX table update high level API > > pipeline: add SWX pipeline specification file > > port: add ethernet device SWX port > > port: add source and sink SWX ports > > table: add exact match SWX table > > examples/pipeline: add new example application > > examples/pipeline: add message passing mechanism > > examples/pipeline: add configuration commands > > examples/pipeline: add l2fwd example > > examples/pipeline: add l2fwd with MAC swap example > > examples/pipeline: add VXLAN encapsulation example > > doc: add new SWX pipeline type to release notes > > > > - Fixed pipeline .map file > - Annotated/sorted the experimental symbols in .map files touched by > this series, > - Updated doxygen index to include the new headers, > - Switched the vxlan python script (coming with the pipeline example) > to python3 + fixed some pylint trivial warnings, > > Series applied. > > > -- > David Marchand
Thanks for your support, David!
