> -----Original Message----- > From: Flavio Leitner [mailto:f...@sysclose.org] > Sent: Friday, February 12, 2016 1:37 AM > To: Stokes, Ian > Cc: dev@openvswitch.org > Subject: Re: [ovs-dev] [PATCH v2] INSTALL.DPDK: Update details of XL710 > restrictions for DPDK 2.2. > > 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. > Thanks for the review Flavio, I'll keep a change log going forward. Apologies for not including one before.
> Based on current dpdk_eth_dev_queue_setup() and dpdk commit > 705b57f82054431ed681cc899129e7c70fb36138 (i40e: enlarge the number of > supported queues) > The line above, do you want this added to the patch or is it an instruction for the change log? > 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
