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| author | Mattias Andrée <maandree@operamail.com> | 2014-11-07 23:40:13 +0100 |
|---|---|---|
| committer | Mattias Andrée <maandree@operamail.com> | 2014-11-07 23:40:13 +0100 |
| commit | 519901db42f8a99e7605d48fbae59df6bc4ee2fe (patch) | |
| tree | 4ac315d2aa9f2b088d84ed3344b8ce9a7ad0738a | |
| parent | m (diff) | |
| download | get-luminosity-519901db42f8a99e7605d48fbae59df6bc4ee2fe.tar.gz get-luminosity-519901db42f8a99e7605d48fbae59df6bc4ee2fe.tar.bz2 get-luminosity-519901db42f8a99e7605d48fbae59df6bc4ee2fe.tar.xz | |
use posix_fadvise
Signed-off-by: Mattias Andrée <maandree@operamail.com>
| -rw-r--r-- | src/framebuffer.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/framebuffer.c b/src/framebuffer.c index 6a6d76a..05ada4a 100644 --- a/src/framebuffer.c +++ b/src/framebuffer.c @@ -51,6 +51,8 @@ int main() height = var_info.yres; inv_width = 1 / (double)width; + posix_fadvise(fd, 0, (size_t)(width * height * 4), + POSIX_FADV_SEQUENTIAL | POSIX_FADV_NOREUSE | POSIX_FADV_WILLNEED); mem = mmap(NULL, (size_t)(width * height * 4), PROT_READ, MAP_SHARED, fd, (off_t)0); if (mem == MAP_FAILED) return perror("get-luminosity::framebuffer: mmap"), close(fd), 1; |