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OFED - Status and Process

OFED - Status and Process. November 2007 Tziporet Koren. Agenda. OFED 1.3 Status OFED Development Process OFED Future Discussion. OpenFabrics Software Stack. OFED – Update Since Sonoma. OFED 1.2 was released on 22-Jun Kernel base: 2.6.20 OFED 1.2.5 was released on 16-Aug

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OFED - Status and Process

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  1. OFED - Status and Process November 2007 Tziporet Koren

  2. Agenda • OFED 1.3 Status • OFED Development Process • OFED Future Discussion

  3. OpenFabrics Software Stack

  4. OFED – Update Since Sonoma • OFED 1.2 was released on 22-Jun • Kernel base: 2.6.20 • OFED 1.2.5 was released on 16-Aug • Kernel base 2.6.22 • ConnectX support • OFED 1.2.5.3 was released on 14-Nov • RDS in GA for Oracle 11g RAC • OFED 1.3 – in middle of release phase • Kernel base 2.6.24

  5. OFED 1.3 Components OFA development Add on • HCA/NIC Drivers • Mellanox, QLogic, IBM, Chelsio, NetEffect • Core: verbs, mad, SMA, CMA, SA cache • IPoIB • SDP • SRP, iSER • SRP Target • RDS • Qlogic_VNIC • UDAPL • OSM • Diagnostic tools • NFS-RDMA – still open • Bonding module • MPI Components • MVAPICH • Open MPI • MVAPICH2 • Benchmark tests • Proprietary MPIs: Intel, HP, Scali • Proprietary SMs: Cisco, Voltaire, Qlogic Tested with

  6. Main New Features - General • Base kernel: 2.6.24 • Install • Minimize integration effort into OS distribution • User level split into separately-installable RPMs • Based on feedback from Novell and Redhat • Package • Sources arrangement for the end user • Added the make-dist script • Reduce compilation warnings of backports

  7. General Features – Cont. • QoS • OSM, CM & CMA, ULPs: SRP, SDP, iSER, IPoIB • Updated SA cache • Integrated with sa_query module • Use of SA events (GID up/down) to provide additional synchronization • User-space control for dynamic enable/disable and update • Extended RC (XRC) Support • New verbs to enable XRC • New modules • NES (NetEffect driver) • SRP Target: Based on Mellanox IBGD SRPT and interfaces with SCST scsi target middle level driver

  8. Main New Features – ULPs • IPoIB • NAPI • Stateless offloads – for Datagram mode • Small message performance improvements • RDS: RDMA with Zero copy (API version 3) • SDP: • Asynch IO • Send Zero Copy • uDAPL 2.0 • In addition to uDAPL 1.0

  9. Main New Features – Management • OpenSM • Quality of Service manager • QoS implementation of the IBTA annex • QoS policy parser and support for SA (PR, MPR) • Scalability/stability improvements • Performance improvements of the routing algorithms (min-hops, up/down, lash) • Optimized port and switch tables update policy • “Native” daemon mode • Performance manager • Fetches and stores performance counters • OpenSM integrated, work in any OpenSM state (standby, disabled) • Plug-in interface • Diagnostic tools enhancements • IBSIM – IB fabric simulator (new) • Emulates user_mad layer • useful for OpenSM and management tools testing

  10. Main New Features - MPI • MVAPICH 1.0 • Asynchronous progress • Flexible message coalescing • APM support • Enhanced mpirun_rsh for scalable launching • UD-based design • Optimized and tuned collectives • Support for ConnectX • Support for QLogic/PSM • Open MPI 1.2.5 • ConnectX support • MVAPICH2 1.0 • Message Coalescing • Hot-spot avoidance • Application-initiated systems-level checkpointing • APM support • Multi-rail support for iWARP • On-demand connection management for iWARP and uDAPL • RDMA Read • Blocking

  11. OFED 1.3 Release Status • Features freeze: Oct 10, 2007 • Alpha: Oct 15, 2007– kernel base: 2.6.23 • Beta: Nov 20, 2007– kernel base: 2.6.24-rc2 • RC1: Dec 4, 2007 • RC2: Dec 18, 2007 • RC3: Jan 8, 2008 • RC4: Jan 22, 2008 • Release: Jan 29, 2008 Note: The delay mainly caused by the move to kernel 2.6.24

  12. OFED 1.3 OS Matrix • kernel.org: kernel 2.6.23 and 2.6.24 • Novell • SLES 10 • SLES 10 SP1 (up1) • Redhat • RHEL 4 (up4 and up5) • RHEL 5 (up1) • Free distros • Partial support only (no QA) • Open SuSE 10.2 • Fedore C6 • Ubuntu 6.06 (with RPM package installed) • Open: OSVs plans to pick up OFED 1.3, or even 1.2.5

  13. Agenda • OFED 1.3 Status • OFED Development Process • OFED Future Discussion

  14. OFED – Development Process • Start – release definition • Agree on release features • Agree on OS matrix and kernel base • Decide on target schedule • Release definition is placed on the Wiki https://wiki.openfabrics.org/tiki-index.php?page=OFED+Development+Wiki • Note • In all OFED releases there were changes in the above that caused release slips • Tracking meetings • Bi-weekly meetings during the development phase • Weekly meetings on the release phase • Meeting summaries are placed on the Wikihttps://wiki.openfabrics.org/tiki-index.php?page=Meeting+Minutes • Bug tracking in bugzilla • https://bugs.openfabrics.org/

  15. Kernel Development • Have one kernel git tree that is maintained by Vlad • git://git.openfabrics.org/ofed_1_3/linux-2.6.git • Cloned from Linux git tree • Add-on components (e.g., SDP) are added to the tree • New features and bug fixes are added as patches under the fixes directory • Patch convention name: <module>_<number>_<text>.patch (e.g., ipoib_0010_cq_coalescing.patch) • Supporting distros and previous kernels: • Backport directory for each kernel OFED can compile on • Add-on directory for headers from Linux • The make-dist script applies first the “fixes” patches and then the appropriate backport patches

  16. User Space Development • Each maintainer has a separate git tree on the server • Examples git://git.openfabrics.org/~sashak/management.gitgit://git.openfabrics.org/~shefty/libibcm.git • Each package has its own RPM SPEC file • All packages should also be released to the ofa download site • http://www.openfabrics.org/downloads.htm • Approaching a release – a branch with the release name is opened • Userspace component fixes must be committed -- no patching scheme is used

  17. External Packages Development • External packages are provided as source RPMs • Each external package has a directory on the ofa server • Example – the bonding package:/home/monis/public_html/ofed_1_3/ • latest.txt file points to the package that should be used • Ex.: ib-bonding-0.9.0-19.src.rpm

  18. OFED Daily Build • An OFED package is created everyday at 6am PST • http://www.openfabrics.org/builds/ofed-1.3/ • This package can be used by all to test the daily changes • This package includes • Source RPMs for kernel, all user space components, external modules • OFED scripts (install, etc.) • OFED documents • Development phase: the build uses the master branch of all git trees • Release phase: the build is based on the release branch

  19. OFED Release Phase • Starts after the alpha release • Close tracking of components status • Alpha, beta and RC are done according to the package maturity • Bugs severity tracking  which bugs must be fixed for the release • Update of all documents

  20. Agenda • OFED 1.3 Status • OFED Development Process • OFED Future Discussion

  21. OFED Goals • Enterprise Working Group within Open Fabrics Alliance (OFA) • OFED has become a brand name in the industry today • Collaborative effort to test & release OFA software • Broader test participation • Components – Kernel & User Space • Interoperability • Add-on components for vendors to differentiate above OFA Reduces deployment complexity and cost

  22. Reasons to Continue OFED • Industry synchronization point • Set of kernel modules, libraries and applications that are tested together • Comprehensive tests by many vendors • OSVs rely on our qualification work • Faster new feature development and deployment • New drivers for new IHV devices • ULP updates for new ISV software packages, e.g., Oracle 11g • Enables support of new features in existing OSes • Ex.: Bonding to work on Redhat EL4 up5, SLES 10, etc

  23. OFED-based and OS Distro-based • OFED-based and OS Distro-based distribution of OFA software – one or both • Originally, some people intended OFED to be a short-term distribution until mainstream Linux distributions caught up and were able to distribute IB/iWARP support • Today there is synergy between OFED and OS vendors as they rely on the OFED quall and support benefits delivered by commercial IB/iWARP suppliers • Are OSV’s ready to take more quall and support responsibilities at this time? • Discussion …

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