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authorHaru <haru@dotalux.com>2013-10-11 05:07:45 +0200
committerHaru <haru@dotalux.com>2013-10-26 12:46:46 +0200
commit44c33fda3614d588e6bf6cee1cf884e98f1531f0 (patch)
treeb617c00c97675668f3c3a8a44b4c966e39ed520c /configure
parentd39918017d4416add066fb78ab7f23cb4436c614 (diff)
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Changed 'tick' variables to 64 bit
- This fixes an issue with timers that stop working after about 24-49 days when the tick overflows (note that this may happen much earlier than that, and at hard to predict times, on some systems) - Updated the RDTSC help message in the configure script to also warn users about issues with SpeedStep enabled systems. - On Windows, tick() still has a resolution of 10~15ms (or even as low as 100ms on some systems). A TODO comment (thanks, Ai4rei) was added for a follow-up patch, as I want this one to be as small as possible) - Note: on Windows versions earlier than 6.x (Vista, Server 2008), the tick overflow issue is NOT fixed, since they don't support the function used to retrieve a 64 bit tick. This isn't a big issue, since those platforms are already - or going soon to be - out of their extended support period, and it's already advisable to upgrade, for other reasons. If you're the unfortunate user of such a system, it is recommended that you reboot your machine at least once every 49 days for Hercules to work reliably. - Note: To clear some doubts, since I've already been asked, this has absolutely NOTHING to do with 32/64 bit CPUs or OSes. It's all about a variable's size, not the size of registers of your CPU, and your 32bit CPU will be able to handle this just fine. Signed-off-by: Haru <haru@dotalux.com>
Diffstat (limited to 'configure')
-rwxr-xr-xconfigure14
1 files changed, 10 insertions, 4 deletions
diff --git a/configure b/configure
index abba75ea1..919d6f883 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
#! /bin/sh
-# From configure.in d26927e.
+# From configure.in c4af60e.
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.69.
#
@@ -1333,9 +1333,15 @@ Optional Features:
in conjunction with XEN or Other Virtualization
mechanisms) Note: Please ensure that you've disabled
dynamic CPU-Frequencys, such as power saving
- options. (On the most modern Dedicated Servers
- cpufreq is preconfigured, see your distribution's
- manual how to disable it)
+ options. (On most modern Dedicated Servers cpufreq
+ is preconfigured, see your distribution's manual how
+ to disable it). Furthermore, If your CPU has
+ built-in CPU-Frequency scaling features (such as
+ Intel's SpeedStep(R)), do not enable this option.
+ Recent CPUs (Intel Core or newer) guarantee a fixed
+ increment rate for their TSC, so it should be safe
+ to use, but please doublecheck the documentation of
+ both your CPU and OS before enabling this option.
--enable-profiler=ARG Profilers: no, gprof (disabled by default)
--disable-64bit Enforce 32bit output on x86_64 systems.
--enable-lto Enables or Disables Linktime Code Optimization (LTO