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
--
1.7.4.1
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