julman99 / eatmemory Goto Github PK

Hi,

Would it be possible to host a binary docker image on the docker hub?

That would ease the process for people who want to use it.

This is what happens if compiled (gcc8 or xlC) on AIX:

#  ./eatmemory 55M
Currently total memory: -4096
Currently avail memory: -4096
..

This also means that memory size cannot be specified as percentage:

# ./eatmemory 30%
Currently total memory: -4096
Currently avail memory: -4096
Eating -1228 bytes in chunks of 1024...
Done, press any key to free the memory

AIX version: 7200-04

Hi,

When I try to run the last example:

$ docker run -d --rm --name hungry_container julman99/eatmemory 128M
Conflicting options: --rm and -d

Do you have the same problem?

Hi,

Would it be possible to go in background mode and do not read the input from the tty?

For the dockerization, it would be better if there is only one process inside that gets killed if it cannot allocate the memory, or being killed by the linux kernel.

Or maybe an argument to like "-d" to go in daemon mode...

Best,

Just a quick question: how do you ensure that the memory is actually allocated in main RAM? What stops the OS from swapping the memory out? Or pushing it to disk as virtual memory?

launched eatmemory 10G on m1 mac with 16G ram, while monitoring via htop, memory graph barely changed at all
and MEM column says it ate only 5%

Hi,

I have launched a 128MB container as mentioned in the example, right after starting it, docker stats outputs rightly 133MB used, but after a while, it only shows 3 MB.

Any idea why?

When I enter the container, the VmData of the eatmemory process still shows the right value:

$ grep VmData /proc/10/status
VmData: 135184 kB

https://github.com/julman99/eatmemory/blob/master/eatmemory.c#L85

Even if compiled with -maix64 size always contains 32bit integer which means one cannot allocate more than 2147483647 bytes. Replacing with atol solves the issue.

With atoi (original):

$ ./eatmemory 3000000000000000
Currently total memory: -4096
Currently avail memory: -4096
Eating 2147483647 bytes in chunks of 1024...

With atol (new):

$ eatmemory 3000000000000000
Currently total memory: -4096
Currently avail memory: -4096
Eating 3000000000000000 bytes in chunks of 1024...