sysfs: enable faking CPU cache configurations using OVERRIDE_SYS_CACHES #383
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If the first saved cache was from level 3, saving level 1 after that crashed on a nil map. This change makes sure that there are no nil maps in sys.caches in the saved or levels below that. Signed-off-by: Antti Kervinen <[email protected]>
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If OVERRIDE_SYS_CACHES environment variable is defined, discovering CPU cache configuration from sysfs is skipped and the configuration is parsed from the json in the variable instead. Signed-off-by: Antti Kervinen <[email protected]>
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This PR is an enabler for testing CPU allocations when there are several CPUs that share the same level 2 cache.