* [dpdk-dev] Why DCA got removed in ixgbe PMD?
@ 2019-09-23 9:36 Phil Yang (Arm Technology China)
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From: Phil Yang (Arm Technology China) @ 2019-09-23 9:36 UTC (permalink / raw)
To: konstantin.ananyev, wenzhuo.lu
Cc: Ruifeng Wang (Arm Technology China),
Gavin Hu (Arm Technology China),
Honnappa Nagarahalli, Song Zhu (Arm Technology China),
dev, nd, nd
Hi, Konstantin & WenZhuo
The ixgbe kernel driver supports DCA (Direct Cache Access) mode to improve IO performance on IA. [ixgbe: Add optional DCA infrastructure<https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bd0362dde080cef377d99fa5beb5c25308c29c73>]
DPDK ixgbe PMD contains some DCA flags in the header files but has no implementation on this mechanism.
https://git.dpdk.org/dpdk/tree/drivers/net/ixgbe/base/ixgbe_type.h [at line 1470]
So why DCA feature got removed in ixgbe PMD?
Is it replaced by any other L2 cache warm technology on x86 DPDK?
Thanks in advance.
Best Regards,
Phil Yang
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