Update DPDK documentation for configuring DLB hardware history list resource using devargs arguments.
Fixes: 33ab065d0c40 ("event/dlb2: support managing history list resource") Signed-off-by: Pravin Pathak <pravin.pat...@intel.com> --- doc/guides/eventdevs/dlb2.rst | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/doc/guides/eventdevs/dlb2.rst b/doc/guides/eventdevs/dlb2.rst index 8ec7168f20..2f836db010 100644 --- a/doc/guides/eventdevs/dlb2.rst +++ b/doc/guides/eventdevs/dlb2.rst @@ -7,6 +7,12 @@ Driver for the IntelĀ® Dynamic Load Balancer (DLB) The DPDK DLB poll mode driver supports the IntelĀ® Dynamic Load Balancer, hardware versions 2.0 and 2.5. +Please follow the links below to download the Programmer Guides. + +`Intel Dynamic Load Balancer 2.0 Programmer Guide <https://cdrdv2.intel.com/v1/dl/getContent/613545>`_. (Device: 0x2710) + +`Intel Dynamic Load Balancer 2.5 Programmer Guide <https://cdrdv2.intel.com/v1/dl/getContent/639481>`_. (Device: 0x2714) + Prerequisites ------------- @@ -477,6 +483,23 @@ Example command to use as meson option for credit handling: meson configure -Dc_args='-DDLB_SW_CREDITS_CHECKS=0 -DDLB_HW_CREDITS_CHECKS=1' +DLB History List Configuration +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Every DLB Load Balancing port (i.e., eventdev port not using RTE_EVENT_PORT_CFG_SINGLE_LINK flag) +has a hardware resource call history list entries (HL) associated with it. This count decides the number +of events that can be inflight to the port from the DLB hardware. DLB has 2048 total HL entries. +As DLB supports 64 load-balanced ports, by default DLB PMD assigns 32 HL entries to each port. +Following devargs arguments allow application to control HL entries overriding default mode. +DLB API rte_pmd_dlb2_set_port_param() allows setting HL entries for the DLB eventdev ports. +Please refer to section "Fine Tuning History List Entries" in DLB Programmer Guide for details. + + .. code-block:: console + + --allow ea:00.0,use_default_hl=0,alloc_hl_entries=1024 + + use_default_hl = 1=Enable (default), 0=Disable + alloc_hl_entries = 0-2048 Total HL entries + Running Eventdev Applications with DLB Device --------------------------------------------- -- 2.39.1