[PATCH v4 08/12] tests/vm: add 1GB extra memory per core

[John Snow]

If you try to run a 16 or 32 threaded test, you're going to run out of
memory very quickly with qom-test and a few others. Bump the memory
limit to try to scale with larger-core machines.

Granted, this means that a 16 core processor is going to ask for 16GB,
but you *probably* meet that requirement if you have such a machine.

512MB per core didn't seem to be enough to avoid ENOMEM and SIGABRTs in
the test cases in practice on a six core machine; so I bumped it up to
1GB which seemed to help.

Add this magic in early to the configuration process so that the
config file, if provided, can still override it.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
---
 tests/vm/basevm.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/vm/basevm.py b/tests/vm/basevm.py
index d7d0413df35..4fd9af10b7f 100644
--- a/tests/vm/basevm.py
+++ b/tests/vm/basevm.py
@@ -99,6 +99,11 @@ def __init__(self, args, config=None):
         self._source_path = args.source_path
         # Allow input config to override defaults.
         self._config = DEFAULT_CONFIG.copy()
+
+        # 1GB per core, minimum of 4. This is only a default.
+        mem = max(4, args.jobs)
+        self._config['memory'] = f"{mem}G"
+
         if config != None:
             self._config.update(config)
         self.validate_ssh_keys()
-- 
2.34.3