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| author | Pádraig Brady <P@draigBrady.com> | 2009-03-06 22:30:55 +0000 |
|---|---|---|
| committer | Pádraig Brady <P@draigBrady.com> | 2009-03-11 14:19:08 +0000 |
| commit | 55efc5f3ee485b3e31a91c331f07c89aeccc4e89 (patch) | |
| tree | 95b9123d558a3583053b103ca8a294a0dcc84464 /NEWS | |
| parent | 93f6771e82401f4c88219938602d4f09628301f4 (diff) | |
| download | coreutils-55efc5f3ee485b3e31a91c331f07c89aeccc4e89.tar.xz | |
cat,cp,mv,install,split: Set the minimum IO block size used to 32KiB
This is following on from this change:
[02c3dc9d 2008-03-06 cat: use larger buffer sizes ...]
which increased the IO block size used by cat by 8 times,
but also capped it at 32KiB.
* NEWS: Mention the change in behavior.
* src/system.h: Add a new io_blksize() function that
returns the max of ST_BLKSIZE or 32KiB, as this was
seen as a good value for a minimum block size to use
to get good performance while minimizing system call overhead.
* src/cat.c: Use it.
* src/copy.c: ditto
* src/split.c: ditto
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -24,6 +24,11 @@ GNU coreutils NEWS -*- outline -*- Previously -k1,1b would have caused leading space from field 2 to be included in the sort while -k2,3.0 would have not included field 3. +** Changes in behavior + + cp,mv,install,cat,split: now read and write a minimum of 32KiB + at a time. This was seen to increase throughput. Up to 2 times + when reading cached files on linux for example. * Noteworthy changes in release 7.1 (2009-02-21) [stable] |