> Am 24.05.2020 um 23:54 schrieb Michael Keuter <li...@mksolutions.info>:
>
>
>
>> Am 24.05.2020 um 23:38 schrieb Michael Keuter <li...@mksolutions.info>:
>>
>>
>>
>>> Am 24.05.2020 um 23:24 schrieb Lonnie Abelbeck <li...@lonnie.abelbeck.com>:
>>>
>>>
>>>
>>>> On May 24, 2020, at 3:49 PM, Michael Keuter <li...@mksolutions.info> wrote:
>>>>
>>>> Try running the "yes" stresstest in the container, with the above
>>>> limitations.
>>>
>>> If I define lxc.cgroup.cpuset.cpus to 1, or 2 or 3, the "yes" stress-test
>>> [1] only uses one core.
>>>
>>> Setting lxc.cgroup.cpuset.cpus=4 the container does not start.
>>>
>>> Not setting lxc.cgroup.cpuset.cpus all 4 cores are used.
>>>
>>> Lonnie
>>>
>>> [1]
>>> (start test)
>>> # for x in 1 2 3 4; do ( yes >/dev/null & ); done
>>>
>>> (stop test)
>>> # killall yes
>>
>> ----
>> From the man page:
>>
>> lxc-cgroup -n foo cpuset.cpus "0,3"
>> assign the processors 0 and 3 to the container.
>> ----
>>
>> I guess you define which CPU cores are allowed to use (0-3), that's why 4
>> does not work :-).
>>
>> lxc.cgroup.cpuset.cpus=0,3 (maybe in quotes, should use core 1 and 4)
>
> Yup, this uses CPU 2 + 4 (core 0 + 3), you define the actual cores NOT the
> count!
>
> lxc.cgroup.cpuset.cpus = 1,3
The RAM limit seems also be working fine. I set this in the container config:
lxc.cgroup.memory.limit_in_bytes = 256M
For the test you need to install the "pv" command to see the actual RAM value:
----
root@deb10:# dd if=/dev/zero bs=1024 | pv -b -B 1024 | dd of=/dev/shm/fill
bs=1024
dd: error writing '/dev/shm/fill': Cannot allocate memory
240MiB
246721+0 records in
246720+0 records out
252641280 bytes (253 MB, 241 MiB) copied, 4.63373 s, 54.5 MB/s
----
Sometimes the container crashes at the end of that test.
Michael
http://www.mksolutions.info
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