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[v3,0/2] eal: add WC store functions

Message ID 1593612946-11520-1-git-send-email-radu.nicolau@intel.com (mailing list archive)
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Series eal: add WC store functions | expand


Radu Nicolau July 1, 2020, 2:15 p.m. UTC
Implement 2 new functions that will enable write combining stores
depending on architecture. The functions are provided as a generic
stub and a x86 specific implementation.

The reason to implement these functions is to improve performance by
reducing the overhead associated with regular mmio writes when updating
the hardware queue tails and doorbells.

With this patch set the I40E PMD is updated to use the write combining
store functions with other PMDs to follow.

Radu Nicolau (2):
  eal: add WC store functions
  net/i40e: use WC store to update queue tail registers

 drivers/net/i40e/base/i40e_osdep.h      |  6 ++++
 drivers/net/i40e/i40e_rxtx.c            |  8 ++---
 drivers/net/i40e/i40e_rxtx_vec_avx2.c   |  4 +--
 drivers/net/i40e/i40e_rxtx_vec_sse.c    |  4 +--
 lib/librte_eal/include/generic/rte_io.h | 47 +++++++++++++++++++++++++++
 lib/librte_eal/x86/include/rte_io.h     | 56 +++++++++++++++++++++++++++++++++
 6 files changed, 117 insertions(+), 8 deletions(-)