haraldwolff/qemu-patch-raspberry4
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tests/vm: allow us to take advantage of MTTCG

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We currently limit TCG guests to -smp 1 but now we have added some
aarch64 guests we can do better when running on x86_64 hardware.
Raise the limit for TCG guests when it is safe to do so.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

Message-Id: <20200701135652.1366-16-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2020-07-01 14:56:27 +01:00
parent 2fea3a125d
commit b09539444a
1 changed files with 9 additions and 2 deletions
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11
tests/vm/basevm.py
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@ -551,8 +551,15 @@ def parse_config(config, args):
def parse_args(vmcls):
def get_default_jobs():
if kvm_available(vmcls.arch):
return multiprocessing.cpu_count() // 2
if multiprocessing.cpu_count() > 1:
if kvm_available(vmcls.arch):
return multiprocessing.cpu_count() // 2
elif os.uname().machine == "x86_64" and \
vmcls.arch in ["aarch64", "x86_64", "i386"]:
# MTTCG is available on these arches and we can allow
# more cores. but only up to a reasonable limit. User
# can always override these limits with --jobs.
return min(multiprocessing.cpu_count() // 2, 8)
else:
return 1