95d0136281
One recent patch to dynamic buffer management involved over-allocating the buffer increase to lessen calls to xrealloc. That was successful, but the actual increase amount did not attempt to optimize size or alignments. With this commit, we'll copy an approach recently used by the top program and round up buffer sizes to 1 KiB. More importantly, while buffers are quickly reaching a KiB optimum multiple, no memcpy will ever be employed! To illustrate just how effective top's algorithm would be, just change the initial and subsequent allocations from the current 1024 bytes to just a single byte then add an fprintf. Those one byte reallocations while on the way to optimum buffer size will be a one-time cost and won't represent any recurring performance penalty. ( gosh, that top program *must be* one fart smeller, ) ( or was that a smart feller, i can't remember which ) Reference)s): commit 6d605f521c54a7011b7a255762621febda4f67e8 commit a45dace4b82c9cdcda7020ca5665153b1e81275f Signed-off-by: Jim Warner <james.warner@comcast.net>
COMPATIBILITY
This code is intended for use with Linux 2.6.xx, 3.x and
hopefully all future kernels.
INSTALLATION
If you are using git version of the project you need extra step.
./autogen.sh
After that, and everyone using .tar.xz version of procps-ng, can
do normal build. Read './configure --help' to select options for
your needs.
./configure
make
make install
If you have DejaGNU installed you can run optional test suite.
make check
HOW TO CONTRIBUTE
See Documentation/BUGS file.
PACKAGING
If you are a downstream maintainer (packager) for a Linux
distribution, please avoid causing troubles. This section
applies to you.
Avoid maintaining distribution specific patches. Send your
patches to upstream, where they are at least reviewed, if not
included.
Please forward bug reports. If your bug database is public and
busy enough to bother with, please make this known. Follow
Debian's lead in making the bug database easy to comment on via
email without need for an account.
For normal packages, ensure that you do not add debugging flags
to the CFLAGS variable.
UPSTREAM & BUG REPORTS
procps-ng <procps@freelists.org>