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5da0fc9dbf
Current implementation allows each qp to have only one send engine. As such, each qp has only one list to queue prebuilt packets when send engine resources are not available. To improve performance, it is desired to support multiple send engines for each qp. This patch creates the framework to support two send engines (two legs) for each qp for the TID RDMA protocol, which can be easily extended to support more send engines. It achieves the goal by creating a leg specific struct, iowait_work in the iowait struct, to hold the work_struct and the tx_list as well as a pointer to the parent iowait struct. The hfi1_pkt_state now has an additional field to record the current legs work structure and that is now passed to all egress waiters to determine the leg that needs to wait via a new iowait helper. The APIs are adjusted to use the new leg specific struct as required. Many new and modified helpers are added to support this change. Reviewed-by: Mitko Haralanov <mitko.haralanov@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Kaike Wan <kaike.wan@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.