Cyril Roelandt, le Tue 23 Oct 2012 22:07:19 +0200, a écrit : > On 10/19/2012 02:54 PM, Samuel Thibault wrote: > >Cyril Roelandt, le Fri 19 Oct 2012 00:42:12 +0200, a écrit : > >>On GNU/Linux, sysconf(_SC_CLK_TCK_) returns 100, so the time spent in user > >>mode would be 2884 ticks (if we use the values from my example), which is > >>2884/100 = 28.84 seconds.On Hurd, sysconf(_SC_CLK_TCK) returns 1000000, so, > >>does that mean that the time spent in user mode is roughly zero ? > > > >No, because of this: > > > >>On my machine, /hurd/procfs is launched with the "-c" option (Linux > >>compatible) which forces the translator to use 100 as the number of ticks > >>per second, rather than calling sysconf(_SC_CLK_TCK_). But one just cannot > >>easily retrieve this value. I must admit I'm a bit confused. > > > >The problem we have is that a lot of tools don't call > >sysconf(_SC_CLK_TCK_), but actually hardcode 100. That is why a > >compatibility mode was introduced for them, but it's independent from > >the _SC_CLK_TCK value, thus the confusion. Ideally we fix all users of > >/proc which hardcode 100, and then we can get rid of the -c option. > > So, would calling sysconf(_SC_CLK_TCK_) rather than using "100" result in > getting wrong values ? :-p
Unfortunately currently yes. Samuel -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
