Messages in this thread | | | From | Grant Coady <> | Subject | Query: is there an official location for jiffies per second value? | Date | Thu, 18 Sep 2008 17:23:58 +1000 |
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Hi there,
I found I can get jiffies per second with this on one box:
grant@deltree:~$ uname -r 2.6.26.5a
grant@deltree:~$ awk 'FNR==NR{up=$1};/^jiffies:/{print up, $2, $2/up}' \ /proc/uptime /proc/timer_list 420389.04 126026727 299.786
But this value is very different on another box:
grant@pooh64:~$ uname -r 2.6.26.5a
grant@pooh64:~$ awk 'FNR==NR{up=$1}/^jiffies:/{print up, $2, $2/up}' \ /proc/uptime /proc/timer_list 73830.36 4317026409 58472.2 73830.36 4317026409 58472.2
Is there a reliable way to determine this jiffies value across different x86 boxes?
The 'sysconf(_SC_CLK_TCK)' doesn't return the right answer either. It says 100Hz when it is 300Hz.
Thanks, Grant.
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