[Bug 1549] New: hwclock --systohc can take 25 seconds
bugzilla at busybox.net
bugzilla at busybox.net
Wed Apr 14 10:53:57 UTC 2010
https://bugs.busybox.net/show_bug.cgi?id=1549
Host: GNU/Linux 2.6 x86
Target: GNU/Linux 2.4 ARM / i.MX21
Build: 1.16.1
Summary: hwclock --systohc can take 25 seconds
Product: Busybox
Version: 1.16.x
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P5
Component: Other
AssignedTo: unassigned at busybox.net
ReportedBy: ivo.clarysse at gmail.com
CC: busybox-cvs at busybox.net
Estimated Hours: 0.0
Since busybox 1.6.0, "hwclock --systohc" takes 25 seconds to complete on a
Freescale i.MX21 (an ARM-based SoC) running at 266MHz.
This is due to the ""2010-01-06 hwclock: fix sizeof bug (used it on pointer,
not array); make --systohc exact" change introduced in busybox 1.16.0.
Changing TWEAK_USEC from 200 to 1000 brought this time down again to less than
0.1 second.
By default TWEAK_USEC appears to be tuned for a 2.2GHz Intel Core 2. It would
appear that when building for a typical embedded device, busybox must be
patched to have 'hwclock --systohc' complete in an acceptable timespan.
--
Configure bugmail: https://bugs.busybox.net/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.
More information about the busybox-cvs
mailing list