The tests generate a performance report in $BASEPATH/perf.js and
hooks/pre-push copies it to the website.  To avoid cluttering the working
directory, instead put perf.js in $LOGDIR/web, since it's a test output
artefact.  Update hooks/pre-push to copy from its new location.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

The asciinema video handling creates a number of temporary files (.uncat,
.start, .stop) which currently go into the source tree.  Put them in the
temporary state directory to avoid clutter.

The final processed output is now placed into test_logs/web/ along with the
corresponding .js file with links, since they're essentially test
artefacts.  hooks/pre-push is updated to look for those files in the new
location when updating the web site.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

Upload gzipped js snippets for usage with gzip_static in nginx or
equivalent. Convert png drawings to webp for smaller size, use them
as alternatives in README.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

Convenience packages are anyway built from static builds.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

Build-time selection of AVX2 flags and routines is not practical for
distributions, but limiting AVX2 usage to checksum routines with
specific run-time detection doesn't allow for easy performance gains
from auto-vectorisation of batched packet handling routines.

For x86_64, build non-AVX2 and AVX2 binaries, and implement a simple
wrapper replacing the current executable with the AVX2 build if it's
available, and if AVX2 is supported by the current CPU.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

...to benefit from gzip_static in nginx or equivalent.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

...nobody uses those builds anymore.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>