SIS MP success

Jiri Gaisler jiri at
Sat Dec 15 08:17:28 UTC 2018

On 12/15/18 1:07 AM, Chris Johns wrote:
> On 14/12/18 8:48 pm, Jiri Gaisler wrote:
>> OK, I will look into this over Christmas. I have some long flights
>> coming up so it will be a good way to kill time ... :-)
> Great. I have been on a few flights recently and I have been doing the same
> thing. Power in the seats is nice and WiFi is even better.
>> Failures:
>>  dl07.exe
> That should not be happening. I will check this as part of some work I am planning.
>> Invalid:
>>  spinternalerror01.exe
>>  sptimecounter01.exe
> These are typically crashes.
>> Average test time: 0:00:00.498379
>> Testing time     : 0:05:20.956184
> That is a nice run time.

It's on my 5 years old i7-4790S (8 threads, 65W). Without the SMP tests,
I get run times of about 2 - minutes. I use the leon3-sis target in
rtems-test. If I use leon3-run, rtems-test hangs after a few tests
unless I use --jobs=1.

> If you add the --mail and related options (--mail-to, --mail-from, --smtp-host)
> the results can be posted to build at We love seeing results being
> posted by any and everyone.
>> The four failing/invalid tests fail the same way on real hardware, so I
>> am not too worried about this. 
> Is the failure seen without rtems-test?
> I ask because I think there maybe a bug in rtems-test with a threading load when
> running a number of simulations at once. I am not sure if this is a qemu
> specific issue or a general one, I need to revisit it. I suspect a locking issue
> in rtems-test and it can be seen with tests hanging and simulators showing 0
> load in top.
> On a non-smp build, I get the same fails,
>> so it seems to be some issue with the tests...
> There is a ticket open on 5.1 to have tests that do fail to be tagged as
> "Expected Fail" so we can baseline what is expected. I cannot do this alone
> because I am not sure which ones are expected failures.

I looked into the failures again and they only occur on leon3 when
compiled with --enable-smp. On erc32 and leon2, and on leon3 without
--enable-smp they run OK. I am working on improving gdb debugging
support for sis-mp, so debugging the failures of the RTEMS tests could
be a good test case to check how well it works. Breakpoints and stepping
in an MP system are not that obvious to handle ...

> Chris
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