Martin Guy via cfarm-users wrote:
Il 27/03/24 08:48, Pierre Muller via cfarm-users ha scritto:
[...]
Test tw2494 is specifically a test that checks what is happening
if the program tries to allocate 4096 Tb (=2Gb*2Gb).
I was going to say "Give it some swap space?" but that seems so
obvious to be fatuous, however, I wonder if the system running out of
VM might affect other processes on the same machine.
Pierre, can you obtain the same effect by using ulimit?
The system is not running out of VM at all. It is rejecting
outrageously large allocations, as it is expected to do. If I read the
above correctly, there is a test that expects to cause the system to
return ENOMEM by asking "for the moon"---a large multiple of the total
space available on any currently-reasonable machine.
Adjusting the tests to use ulimit and an otherwise-satisfiable
allocation would likely work, but would limit the portability of the
tests, as not all systems have ulimit. DOS, for example, most certainly
does not.
Pierre's current solution will work until someone actually has a machine
with about 4 PB of RAM.
-- Jacob
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