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| author | Ian Stokes <ian.stokes@intel.com> | 2016-02-09 14:48:47 +0000 |
|---|---|---|
| committer | Daniele Di Proietto <diproiettod@vmware.com> | 2016-02-19 14:56:28 -0800 |
| commit | 49bbbdfdd5d562b271a4c4ee9a8799e69448afa4 (patch) | |
| tree | 2fcf81525aca790cf1fe2791bfb255bc1c69ef02 /INSTALL.DPDK.md | |
| parent | 361493368266a6586b4183e2f9b385992bfa3d6d (diff) | |
| download | openvswitch-49bbbdfdd5d562b271a4c4ee9a8799e69448afa4.tar.gz | |
INSTALL.DPDK: Update details of XL710 restrictions for DPDK 2.2.
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.stokes@intel.com>
Acked-by: Flavio Leitner <fbl@sysclose.org>
Acked-by: Daniele Di Proietto <diproiettod@vmware.com>
Diffstat (limited to 'INSTALL.DPDK.md')
| -rw-r--r-- | INSTALL.DPDK.md | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/INSTALL.DPDK.md b/INSTALL.DPDK.md index d8927880c..b0659c974 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 |