[Xenomai] help for cyclictest

[Luca Bolli SPES <luca.bolli@spesonline.com>]

Good morning at all, I'm new in this mailing list so in first time I 
will apologize for any mistake that
I'll do. Recently I realized a toolchain for an ARM9 AT91 based (kernel 
3.0.36, gcc 4.6.3, libc 2.13)
and I successfully ported the latest version of Xenomai (2.6.2.1).
The cross-compiled kernel (and patched with 
adeos-ipipe-3.0.36-arm-1.18-11.patch) starts without
errors. After this, I'll try to run some tests with cyclictest that I 
compiled, with the same toolchain
and with this options (passed to configure tool):
configure CFLAGS="-march=armv4t" LDFLAGS="-march=armv4t"  
--build=i686-pc-linux-gnu
--host=arm-<vendor>-linux-gnueabi-

When I started to carry out my tests, I noticed a strange behavior of 
cyclictest software and
I used this option for launch the tests: cyclictest -t 2 - p 80 -n -i 
10000 -l 10000 -v

The problem is that with more 1 thread the cyclictest never end, and 
remain in running state
even if the test is completed.

This is the code of main in cyclictest 
(xenomai-2.6.2.1/src/testsuite/cyclic):

     while (!test_shutdown) {
         char lavg[256];
         int fd, len, allstopped;

         if (!verbose && !quiet) {
             fd = open("/proc/loadavg", O_RDONLY, 0666);
             len = read(fd, &lavg, 255);
             close(fd);
             lavg[len-1] = 0x0;
             printf("%s          \n\n", lavg);
         }

         allstopped = max_cycles ? 1 : 0;

         for (i = 0; i < num_threads; i++) {
             print_stat(&par[i], i, verbose);
             if (stat[i].cycles < max_cycles)
                 allstopped = 0;
         }
         usleep(10000);
         if (test_shutdown || allstopped == num_threads)
             break;
         if (!verbose && !quiet)
             printf("\033[%dA", num_threads + 2);
     }

I think that the "break condition" for exit by the while(!test_shutdown) 
is wrong, in fact while the
test_shutdown is used to catch the sighand interaction (ctrl +c for stop 
the process), the variable
allstopped is always 0 or 1, and for more 1 thread will have no value 
greater than 1 and the
conditions allstopped == num_threads will never be satisfied.

I don't know if there are any explanations for this apparent error... so 
I decide to write to this ML.
(Maybe there aren't any reasons to use cyclictest with more 1 thread... )

I hope that the problem is clear, otherwise please don't hesitate to ask 
me for more.
explanations.

Thak you all for any help,

Kind reagards


Luca Bolli



-- 

*Luca Bolli*
Embedded Software Designer

*SPES. S.c.p.a*
Via Lamberto Corsi, 43 60044 Fabriano (AN)
tel +39 0732 2529 440
fax +39 0732 2529 441

luca.bolli@spesonline.com <mailto:luca.bolli@spesonline.com>
http://www.spesonline.com

logo Spes

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