Re: [PATCH v2 00/10] Add a libblkio engine

[Vincent Fu <vincentfu@gmail.com>]

On 12/1/22 17:07, Alberto Faria wrote:
> The libblkio library provides a unified API for efficiently accessing
> block devices using modern high-performance block I/O interfaces like
> io_uring and vhost-user-blk. Using libblkio reduces the amount of code
> needed for interfacing with storage devices and allows developers to
> focus on their applcations.
> 
> Add a libblkio engine that uses libblkio to perform I/O. This is useful
> to benchmark the library itself, and also adds support for storage
> interfaces and devices otherwise not supported by fio, such as
> virtio-blk PCI, vhost-user, and vhost-vDPA devices.
> 
> See the libblkio documentation [2] or KVM Forum 2022 [3] presentation
> for more information on the library itself.
> 
> [1] https://gitlab.com/libblkio/libblkio
> [2] https://libblkio.gitlab.io/libblkio/index.html
> [3] https://static.sched.com/hosted_files/kvmforum2022/8c/libblkio-kvm-forum-2022.pdf
> 
> v2:
> - In the HOWTO and manpage, point users to the libblkio docs to know
>    what drivers and properties are available.
> - Avoid mentioning libblkio API symbols in the HOWTO and manpage.
> - Don't document FIO_OPT_STR_SET options as having type bool in the
>    HOWTO and manpage.
> - Prevent null deref in fio_blkio_init() error path.
> - Fix total_threaded_subjobs() to only count jobs using the libblkio
>    engine.
> - Force `td->o.disable_slat = 1`, as request enqueueing is fast and it
>    is not possible to know exactly when a request is submitted.
> - Have all type declarations near the top of the file.
> - Be more economical with blank lines.
> 
> Alberto Faria (10):
>    Add a libblkio engine
>    Add engine flag FIO_SKIPPABLE_IOMEM_ALLOC
>    engines/libblkio: Allow setting option mem/iomem
>    engines/libblkio: Add support for poll queues
>    engines/libblkio: Add option libblkio_vectored
>    engines/libblkio: Add option libblkio_write_zeroes_on_trim
>    engines/libblkio: Add option libblkio_wait_mode
>    engines/libblkio: Add option libblkio_force_enable_completion_eventfd
>    engines/libblkio: Add options for some driver-specific properties
>    engines/libblkio: Share a single blkio instance among threads in same
>      process
> 
>   HOWTO.rst                                 |  95 +++
>   Makefile                                  |   6 +
>   configure                                 |  25 +
>   engines/libblkio.c                        | 914 ++++++++++++++++++++++
>   examples/libblkio-io_uring.fio            |  29 +
>   examples/libblkio-virtio-blk-vfio-pci.fio |  29 +
>   fio.1                                     |  78 ++
>   ioengines.h                               |   2 +
>   memory.c                                  |  22 +-
>   optgroup.h                                |   2 +
>   10 files changed, 1192 insertions(+), 10 deletions(-)
>   create mode 100644 engines/libblkio.c
>   create mode 100644 examples/libblkio-io_uring.fio
>   create mode 100644 examples/libblkio-virtio-blk-vfio-pci.fio
> 


Applied. Thanks.