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Ingo Molnar b0fe551000 kconfig: improve seed in randconfig 
'make randconfig' uses glibc's rand function, and the seed of
that PRNG is set via:

			srand(time(NULL));

But 'time()' only increases once every second - freezing the
randconfig result within a single second.

My Nehalem testbox does randconfig much faster than 1 second
 and i have a few scripts that do 'randconfig until condition X'
loops.

Those scripts currently waste a lot of CPU time due to randconfig
changing its seed only once per second currently.

Change the seed to be micrseconds based. (I checked the statistical
spread of the seed - the now.tv_sec*now.tv_usec multiplication
there further improves it.)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Roman Zippel <zippel@linux-m68k.org>
[sam: fix for systems where usec is zero - noticed by Geert Uytterhoeven]
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2009-03-15 23:02:07 +01:00
..
basic Update .gitignore files for generated targets 2008-10-20 11:24:31 -07:00
genksyms Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
kconfig kconfig: improve seed in randconfig 2009-03-15 23:02:07 +01:00
ksymoops
mod HID: fix bus endianity in file2alias 2009-02-17 13:25:01 +01:00
package kbuild: fix 'make rpm' when CONFIG_LOCALVERSION_AUTO=y and using SCM tree 2009-03-07 13:55:38 +01:00
rt-tester
selinux SELinux: add gitignore file for mdp script 2008-09-05 21:43:38 +10:00
trace tracing: add "power-tracer": C/P state tracer to help power optimization 2008-11-26 08:29:32 +01:00
tracing ftrace: add a script to produce a hierarchical view of a function trace 2008-10-27 11:00:07 +01:00
.gitignore fix modules_install via NFS 2009-01-07 21:44:20 +01:00
bin2c.c
binoffset.c
bloat-o-meter
bootgraph.pl bootgraph: fix for use with dot symbols 2009-02-15 12:50:08 +01:00
checkincludes.pl
checkkconfigsymbols.sh
checkpatch.pl checkpatch: version 0.28 2009-02-27 16:26:22 -08:00
checkstack.pl sparc: Add checkstack support 2008-10-22 21:53:49 -07:00
checksyscalls.sh scripts/checksyscalls.sh: fix for non-gnu sed 2008-10-29 22:02:08 +01:00
checkversion.pl
cleanfile
cleanpatch
config kbuild: print usage with no arguments in scripts/config 2009-01-14 21:40:49 +01:00
conmakehash.c
decodecode scripts: improve the decodecode script 2008-12-03 22:36:39 +01:00
diffconfig kconfig: add diffconfig utility 2008-07-25 22:12:41 +02:00
export_report.pl
extract-ikconfig remove bashisms from scripts/extract-ikconfig 2008-12-03 21:32:02 +01:00
gcc-version.sh
gcc-x86_64-has-stack-protector.sh
gen_initramfs_list.sh kbuild: fix unportability in gen_initramfs_list.sh 2008-04-28 22:50:51 +02:00
headerdep.pl kbuild: add headerdep used to detect inclusion cycles in header files 2008-12-18 20:18:04 +01:00
headers.sh kbuild: prepare headers_* for arch/$ARCH/include 2008-07-25 22:12:33 +02:00
headers_check.pl kbuild: ignore a few files in headers_check 2009-01-02 20:43:27 +01:00
headers_install.pl kbuild: in headers_install autoconvert asm/inline/volatile to __xxx__ 2009-01-02 20:43:24 +01:00
ihex2fw.c fix modules_install via NFS 2009-01-07 21:44:20 +01:00
kallsyms.c Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
Kbuild.include kbuild: use KECHO convenience echo 2008-12-03 21:32:01 +01:00
kernel-doc kernel-doc: fix syscall wrapper processing 2009-02-11 14:25:36 -08:00
Lindent scripts/Lindent: support gnu indent v2.2.10 2008-04-29 08:06:04 -07:00
Makefile fix modules_install via NFS 2009-01-07 21:44:20 +01:00
Makefile.build Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
Makefile.clean
Makefile.fwinst firmware: silence __fw_modbuild and __fw_modinst 'Nothing to be done' messages 2008-08-02 07:52:29 +01:00
Makefile.headersinst kbuild: install all headers when arch is changed 2008-07-25 22:12:18 +02:00
Makefile.host
Makefile.lib kbuild: expand -I in KBUILD_CPPFLAGS 2008-12-03 21:31:59 +01:00
Makefile.modinst Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
Makefile.modpost kbuild: fix KBUILD_EXTRA_SYMBOLS 2008-10-29 22:02:09 +01:00
makelst
markup_oops.pl scripts: add x86 64 bit support to the markup_oops.pl script 2009-02-15 12:50:10 +01:00
mkcompile_h kbuild: kill output in silent mode of mkcompile_h 2008-12-03 21:32:00 +01:00
mkmakefile kbuild: teach mkmakfile to be silent 2008-12-03 21:32:02 +01:00
mksysmap Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
mkuboot.sh
mkversion
namespace.pl
patch-kernel bugfix for scripts/patch-kernel in 2.6 sublevel stepping 2008-08-06 22:11:33 +02:00
pnmtologo.c
profile2linkerlist.pl
recordmcount.pl tracing/function-graph-tracer: add a new .irqentry.text section 2008-12-12 11:14:07 +01:00
setlocalversion kbuild,setlocalversion: shorten the make time when using svn 2009-02-15 12:50:07 +01:00
show_delta
tags.sh kbuild: add sys_* entries for syscalls in tags 2009-02-15 12:50:09 +01:00
unifdef.c kbuild: fix C libary confusion in unifdef.c due to getline() 2009-03-07 13:31:29 +01:00
ver_linux kbuild: scripts/ver_linux: don't set PATH 2008-07-31 23:36:54 +02:00