[LTP] [PATCH] cpuset_memory_spread: change lowerlimit to 5000kb

[Martin Doucha]

On 16. 06. 23 4:10, Hongchen Zhang wrote:
> Hi Martin,
> 
> On 2023/6/15 pm 10:27, Martin Doucha wrote:
>> Hi,
>>
>> On 09. 06. 23 3:27, Hongchen Zhang wrote:
>>> When I test the cpuset_memory_spread case,this case FAIL too often.
>>> After dig into the code, I find out that the fowlloing things trigger
>>> the FAIL:
>>> 1) random events,the probability is very small and can be ignored
>>> 2) get_meminfo which before send signal to test_pid
>>> 3) account_memsinfo before result_check
>>>
>>> About 2) and 3), we can increase the value of lowerlimit to keep
>>> the result as SUCCESS.After my testing, 5000kb is a reasonable value.
>>
>> we're also seeing these failures but only on architectures like 
>> PowerPC with pagesize higher than the usual 4KB. On which 
>> architectures do you see failures and what's the pagesize there?
> I test on 3C5000+7A2000 machine, the architecture is LoongArch.The 
> pagesize we used is 16KB.

So the underlying cause is the same - higher pagesize. That means the 
upperlimit, lowerlimit and DATAFILE size should be calculated from 
pagesize instead.

-- 
Martin Doucha   mdoucha@suse.cz
SW Quality Engineer
SUSE LINUX, s.r.o.
CORSO IIa
Krizikova 148/34
186 00 Prague 8
Czech Republic