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| author | Jannik Glückert <jannik.glueckert@gmail.com> | 2023-03-06 20:52:08 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2023-06-06 12:31:57 +0100 |
| commit | f80a8b42296265bb868a48592a2bd1fdaa2a3d8a (patch) | |
| tree | 40054d92f4a3a9d0b5c2ece3bd68124a0006f62d /libstdc++-v3/config.h.in | |
| parent | c4deccd44655c5d748dfed200a37f2b678c32fe8 (diff) | |
| download | gcc-f80a8b42296265bb868a48592a2bd1fdaa2a3d8a.zip gcc-f80a8b42296265bb868a48592a2bd1fdaa2a3d8a.tar.gz gcc-f80a8b42296265bb868a48592a2bd1fdaa2a3d8a.tar.bz2 | |
libstdc++: Also use sendfile for big files
We were previously only using sendfile for files smaller than 2GB, as
sendfile needs to be called repeatedly for files bigger than that.
Some quick numbers, copying a 16GB file, average of 10 repetitions:
old:
real: 13.4s
user: 0.14s
sys : 7.43s
new:
real: 8.90s
user: 0.00s
sys : 3.68s
libstdc++-v3/ChangeLog:
* acinclude.m4 (_GLIBCXX_HAVE_LSEEK): Define.
* config.h.in: Regenerate.
* configure: Regenerate.
* src/filesystem/ops-common.h (copy_file_sendfile): Define new
function for sendfile logic. Loop to support large files. Skip
zero-length files.
(do_copy_file): Use it.
Signed-off-by: Jannik Glückert <jannik.glueckert@gmail.com>
Diffstat (limited to 'libstdc++-v3/config.h.in')
| -rw-r--r-- | libstdc++-v3/config.h.in | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in index 5a95853..99ce682 100644 --- a/libstdc++-v3/config.h.in +++ b/libstdc++-v3/config.h.in @@ -254,6 +254,9 @@ /* Define to 1 if you have the `logl' function. */ #undef HAVE_LOGL +/* Define if lseek is available in <unistd.h>. */ +#undef HAVE_LSEEK + /* Define to 1 if you have the <machine/endian.h> header file. */ #undef HAVE_MACHINE_ENDIAN_H |