Commit 025de7b6 authored by Pedro Tammela's avatar Pedro Tammela Committed by Jakub Kicinski
Browse files

selftests: tc-testing: cap parallel tdc to 4 cores 



We have observed a lot of lock contention and test instability when running with >8 cores.
Enough to actually make the tests run slower than with fewer cores.

Cap the maximum cores of parallel tdc to 4 which showed in testing to
be a reasonable number for efficiency and stability in different kernel
config scenarios.

Signed-off-by: default avatarPedro Tammela <pctammela@mojatatu.com>
Reviewed-by: default avatarSimon Horman <horms@kernel.org>
Acked-by: default avatarJamal Hadi Salim <jhs@mojatatu.com>
Link: https://lore.kernel.org/r/20231117171208.2066136-2-pctammela@mojatatu.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent b1711d43

tools/testing/selftests/tc-testing/tdc.py

+1 −0
Original line number Diff line number Diff line
@@ -1017,6 +1017,7 @@ def main(): 
    parser = pm.call_add_args(parser)

    (args, remaining) = parser.parse_known_args()

    args.NAMES = NAMES

    args.mp = min(args.mp, 4)

    pm.set_args(args)

    check_default_settings(args, remaining, pm)

    if args.verbose > 2: