Messages in this thread | ![/](/images/icornerl.gif) | | Date | Tue, 08 Apr 2003 18:36:52 -0700 (MST) | From | Shesha@asu ... | Subject | Re: readprofile: 0 total nan (fwd) |
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Hello All
I am not very sure that it is readprofile application problem. I downloaded readprofile source and I compiled it. It worked fine on x86 machine running 2.4.7-10 kernel. I cross compiled it for xscale processor running 2.4.18 it is not working.
Any Input?
On Tue, 8 Apr 2003, Andy Pfiffer wrote:
> On Tue, 2003-04-08 at 15:41, Shesha@asu.edu wrote: > > I am running 2.4.18 kernel for ARM. I have one of the boot parameters > > "profile=2". The size of the /proc/profile file is shown as 16MB. But when I > > execute "readprofile" the output is ... > > 0 total nan > > > > If I cat the file it just give me a ".". Can anyone suggest what i am doing > > wrong? > > [ I swear I was just talking about this problem with someone else... ] > > 1. /proc/profile is a binary file. cat won't show you anything > meaningful. > > 2. the 0 output by readprofile is a problem with the automatic > byte-order detection heuristic built into the code. Try invoking > readprofile with the "-n" option, and see if your problem goes away. > > FYI: For those that might also run into this, the essence of the problem > is this piece of code in readprofile.c (fragmented for clarity): > > "optNative" is 0. > "buf" is an unsigned int *. > > > if (!optNative) { > int entries = len/sizeof(*buf); > int big = 0,small = 0,i; > unsigned *p; > > for (p = buf+1; p < buf+entries; p++) > if (*p) { > if (*p >= 1 << (sizeof(*buf)/2)) big++; > else small++; > } > if (big > small) { > fprintf(stderr,"Assuming reversed byte order. " > "Use -n to force native byte order.\n"); > <snipped> > . > . > . > } > } > > Based on my read of the code, "big" will be incremented if *p >= 4, > otherwise "small" will be incremented. I can't see how this would ever > detect the byte order... > > Werner proposed this as a solution, but it could still fail to correctly > detect the byteorder (although with much less frequency): > > >
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