| Re: [ptp-user] eclipse console eats output |
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On Saturday, December 15, 2012 12:00:07 Greg Watson wrote: > Christoph, > > Good point. There are a lot of factors involved in getting the output to the > Eclipse console, which I won't go into here. Suffice to say that combining > both buffered and un-buffered I/O in this way is bound to cause issues like > this. You could try using printf or fputc instead of write to confirm. > > Regards, > Greg
Greg,
kudos to my IBM colleagues at MPI development. Concurrently to this PTP discussion thread there was also a bug report filed against IBM PE with identical test case and title "poe eats output".
MPI development identified the terminating ASCII \0 as the root cause - poe hits the first \0 and thinks stdout is done.
I tried the same thing for Eclipse PTP console by adding the following change to my test program. ---------------------------------- diff --git a/helloa.c b/helloa.c index 927d701..7d5e521 100644 --- a/helloa.c +++ b/helloa.c @@ -7,6 +7,7 @@ int main(int argc, char* argv[]) { int num_bytes_written; int num_repeats = 1; + int num_bytes = sizeof(buf) - 1; int print_num_bytes = 0; int i;
@@ -19,7 +20,7 @@ }
for (i=0; i<num_repeats; i++) { - if (0>(num_bytes_written = write(1, buf, sizeof(buf)) )) { + if (0>(num_bytes_written = write(1, buf, num_bytes) )) { perror("Error in writing buffer: "); } else if (print_num_bytes) { fprintf(stderr," %d Bytes written.\n", num_bytes_written);
This fixes the error for Eclipse as well. - I am now getting the following console output - as expected. abcdefghij 10 Bytes written. abcdefghij 10 Bytes written. abcdefghij 10 Bytes written. abcdefghij 10 Bytes written.
Question - do we treat this as a bug for the Eclipse console ? The same thing was considered a bug for IBM PE stdout handling. If so, can someone point me to the exact place where should I file a bug ? --
Mit freundlichen Grüßen / Kind regards
Dr. Christoph Pospiech High Performance & Parallel Computing Phone: +49-351 86269826 Mobile: +49-171-765 5871 E-Mail: christoph.pospiech@xxxxxxxxxx ------------------------------------------------------------------------------------------------------------------------------------------- IBM Deutschland GmbH / Vorsitzender des Aufsichtsrats: Martin Jetter Geschäftsführung: Martina Koederitz (Vorsitzende), Reinhard Reschke, Dieter Scholz, Gregor Pillen, Joachim Heel, Christian Noll Sitz der Gesellschaft: Ehningen / Registergericht: Amtsgericht Stuttgart, HRB 14562 / WEEE-Reg.-Nr. DE 99369940
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