coreutils/src/splice.h, branch masterMirror of https://https.git.savannah.gnu.org/git/coreutils.git/
https://git.shady.money/coreutils/atom?h=master2026-04-16T21:05:13Zbuild: fix build failure on AIX2026-04-16T21:05:13ZPádraig BradyP@draigBrady.com2026-04-16T21:02:03Zurn:sha1:5597a275c2b60610090b40dd64ff5904dd393f41
* m4/jm-macros.m4: AIX has a splice() function for TCP,
so check for vmsplice() instead.
* src/splice.h: Define HAVE_SPLICE if vmsplice available.
Reported by Bruno Haible.
cat: use splice if operating on pipes or if copy_file_range fails2026-04-07T04:57:07ZCollin Funkcollin.funk1@gmail.com2026-03-29T23:13:01Zurn:sha1:457f88513a128ce91160c4a60f821cc1612204be
On a AMD Ryzen 7 3700X system:
$ timeout 10 taskset 1 ./src/cat-prev /dev/zero \
| taskset 2 pv -r > /dev/null
[1.67GiB/s]
$ timeout 10 taskset 1 ./src/cat /dev/zero \
| taskset 2 pv -r > /dev/null
[9.03GiB/s]
On a Power10 system:
$ taskset 1 ./src/yes | timeout 10 taskset 2 ./src/cat-prev \
| taskset 3 pv -r > /dev/null
[12.9GiB/s]
$ taskset 1 ./src/yes | timeout 10 taskset 2 ./src/cat \
| taskset 3 pv -r > /dev/null
[81.8GiB/s]
* NEWS: Mention the improvement.
* src/cat.c: Include isapipe.h, splice.h, and unistd--.h.
(splice_cat): New function.
(main): Use it.
* src/local.mk (noinst_HEADERS): Add src/splice.h.
* src/splice.h: New file, based on definitions from src/yes.c.
* src/yes.c: Include splice.h.
(pipe_splice_size): Use increase_pipe_size from src/splice.h.
(SPLICE_PIPE_SIZE): Remove definition, moved to src/splice.h.
* tests/cat/splice.sh: New file, based on some tests in
tests/misc/yes.sh.
* tests/local.mk (all_tests): Add the new test.