On Tue, 9 Feb 2016 14:48:47 +0000 Ian Stokes <ian.sto...@intel.com> wrote:
> DPDK 2.2 removes restrictions related to maximum number of TX > queues for XL710 devices. Update documentation to reflect these > changes. > > Signed-off-by: Ian Stokes <ian.sto...@intel.com> > --- > INSTALL.DPDK.md | 22 +++++++++++----------- > 1 files changed, 11 insertions(+), 11 deletions(-) > > diff --git a/INSTALL.DPDK.md b/INSTALL.DPDK.md > index d892788..b0659c9 100644 > --- a/INSTALL.DPDK.md > +++ b/INSTALL.DPDK.md > @@ -898,17 +898,17 @@ Restrictions: > this with smaller page sizes. > > Platform and Network Interface: > - - Currently it is not possible to use an Intel XL710 Network Interface as a > - DPDK port type on a platform with more than 64 logical cores. This is > - related to how DPDK reports the number of TX queues that may be used by > - a DPDK application with an XL710. The maximum number of TX queues > supported > - by a DPDK application for an XL710 is 64. If a user attempts to add an > - XL710 interface as a DPDK port type to a system as described above the > - port addition will fail as OVS will attempt to initialize a TX queue > greater > - than 64. This issue is expected to be resolved in a future DPDK release. > - As a workaround a user can disable hyper-threading to reduce the overall > - core count of the system to be less than or equal to 64 when using an > XL710 > - interface with DPDK. > + - By default with DPDK 2.2, a maximum of 64 TX queues can be used with an > + Intel XL710 Network Interface on a platform with more than 64 logical > + cores. If a user attempts to add an XL710 interface as a DPDK port type > to > + a system as described above, an error will be reported that > initialization > + failed for the 65th queue. OVS will then roll back to the previous > + successful queue initialization and use that value as the total number of > + TX queues available with queue locking. If a user wishes to use more than > + 64 queues and avoid locking, then the > + `CONFIG_RTE_LIBRTE_I40E_QUEUE_NUM_PER_PF` config parameter in DPDK must > be > + increased to the desired number of queues. Both DPDK and OVS must be > + recompiled for this change to take effect. > > vHost and QEMU v2.4.0+: > - For versions of QEMU v2.4.0 and later, it is currently not possible to Could you please keep a changelog section after the diffstat? It would help to understand what has changed since the initial proposal. Based on current dpdk_eth_dev_queue_setup() and dpdk commit 705b57f82054431ed681cc899129e7c70fb36138 (i40e: enlarge the number of supported queues) Acked-by: Flavio Leitner <f...@sysclose.org> Also needs to go in branch-2.5. -- fbl _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
