1Updating Information for FreeBSD current users
2
3This file is maintained and copyrighted by M. Warner Losh <imp@freebsd.org>.
4See end of file for further details. For commonly done items, please see the
5COMMON ITEMS: section later in the file. These instructions assume that you
6basically know what you are doing. If not, then please consult the FreeBSD
7handbook.
8
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17 system performance. If you want to do performance measurement,
18 benchmarking, and optimization, you'll want to turn them off. This
19 includes various WITNESS- related kernel options, INVARIANTS, malloc
20 debugging flags in userland, and various verbose features in the
21 kernel. Many developers choose to disable these features on build
22 machines to maximize performance. (To disable malloc debugging, run
23 ln -s aj /etc/malloc.conf.)
24
2520100722:
26 BSD grep has been imported to the base system and it is built by
27 default. It is completely BSD licensed, highly GNU-compatible, uses
28 less memory than its GNU counterpart and has a small codebase.
29 However, it is slower than its GNU counterpart, which is mostly
30 noticeable for larger searches, for smaller ones it is measurable
31 but not significant. The reason is complex, the most important factor
32 is that we lack a modern and efficient regex library and GNU
33 overcomes this by optimizing the searches internally. Future work
34 on improving the regex performance is planned, for the meantime,
35 users that need better performance, can build GNU grep instead by
36 setting the WITH_GNU_GREP knob.
37
3820100713:
39 Due to the import of powerpc64 support, all existing powerpc kernel
40 configuration files must be updated with a machine directive like this:
41 machine powerpc powerpc
42
43 In addition, an updated config(8) is required to build powerpc kernels
44 after this change.
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1179HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
1180STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
1181IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1182POSSIBILITY OF SUCH DAMAGE.
1183
1184Contact Warner Losh if you have any questions about your use of
1185this document.
1186
1187$FreeBSD: head/UPDATING 210389 2010-07-22 19:11:57Z gabor $
2
3This file is maintained and copyrighted by M. Warner Losh <imp@freebsd.org>.
4See end of file for further details. For commonly done items, please see the
5COMMON ITEMS: section later in the file. These instructions assume that you
6basically know what you are doing. If not, then please consult the FreeBSD
7handbook.
8
--- 8 unchanged lines hidden (view full) ---
17 system performance. If you want to do performance measurement,
18 benchmarking, and optimization, you'll want to turn them off. This
19 includes various WITNESS- related kernel options, INVARIANTS, malloc
20 debugging flags in userland, and various verbose features in the
21 kernel. Many developers choose to disable these features on build
22 machines to maximize performance. (To disable malloc debugging, run
23 ln -s aj /etc/malloc.conf.)
24
2520100722:
26 BSD grep has been imported to the base system and it is built by
27 default. It is completely BSD licensed, highly GNU-compatible, uses
28 less memory than its GNU counterpart and has a small codebase.
29 However, it is slower than its GNU counterpart, which is mostly
30 noticeable for larger searches, for smaller ones it is measurable
31 but not significant. The reason is complex, the most important factor
32 is that we lack a modern and efficient regex library and GNU
33 overcomes this by optimizing the searches internally. Future work
34 on improving the regex performance is planned, for the meantime,
35 users that need better performance, can build GNU grep instead by
36 setting the WITH_GNU_GREP knob.
37
3820100713:
39 Due to the import of powerpc64 support, all existing powerpc kernel
40 configuration files must be updated with a machine directive like this:
41 machine powerpc powerpc
42
43 In addition, an updated config(8) is required to build powerpc kernels
44 after this change.
--- 1134 unchanged lines hidden (view full) ---
1179HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
1180STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
1181IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1182POSSIBILITY OF SUCH DAMAGE.
1183
1184Contact Warner Losh if you have any questions about your use of
1185this document.
1186
1187$FreeBSD: head/UPDATING 210389 2010-07-22 19:11:57Z gabor $