Bug#976922: systemd-bootchart: FTBFS on ppc64el: dh_auto_test: error: make -j160 check VERBOSE=1 returned exit code 2

[Lucas Nussbaum]

On 11/12/20 at 13:45 +0100, Michael Biebl wrote:
> Am 11.12.20 um 09:26 schrieb Lucas Nussbaum:
> > I tried to reproduce this on another system (ARM64, 256 visible cores
> > because 2 x ThunderX2, 32 cores/cpu, 4 threads/core) and it also
> > segfaults.
> > 
> > I tried to reproduce on yet another system (x86_64, 128 visible cores
> > because 4x Intel Xeon Gold 6130, 16 cores/cpu, 2 threads/core), and it
> > also segfaults.
> > 
> > My guess would be that the test suite depends on the system it is
> > running on (it just generates the output for the local system), and
> > there's something it doesn't like about large numbers of cores, but
> > there's nothing specific to ppc64el here.
> 
> There is also
> $ grep MAXCPUS -R
> src/bootchart.h:#define MAXCPUS        16
> src/bootchart.h:        double runtime[MAXCPUS];
> src/bootchart.h:        double waittime[MAXCPUS];
> src/store.c:                        if (r < 0 || c > MAXCPUS -1)
> src/store.c:                                /* Oops, we only have room for
> MAXCPUS data */

Indeed, it also crashes on an x86_64 system with only 64 visible cores
(but not on one with 36 visible cores)

Lucas