Messages in this thread | | | From | Serguei Miridonov <> | Subject | Loosing timer interrupts with ACPI | Date | Sun, 15 Jun 2003 21:19:34 -0700 |
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When periodically reading /proc/acpi/battery/BAT0/info (once per second), running "adjtimex --compare=10000" indicates slight slowing down of the system clock. It seems that reading battery info may lead to loosing timer interrupts.
System: Compaq Presario 900Z notebook Kernel: 2.4.21-ac1
First time the system clock drift was noticed when running akpi applet for KDE: ntpdate time corrections were too large. Then I've found that it happens when simply
To test this, run
adjtimex --compare=10000
in first xterm, and the following script on another xterm:
#!/bin/sh
for i in `find /proc/acpi/battery -type f` do echo $i count=0 while [ $count -lt 30 ] do cat $i > /dev/null 2>/dev/null sleep 1 count=$[count+1] done done
Serguei Miridonov.
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