nova_compute_utils.py 文件源码

def get_hugepage_number():
    # TODO: defaults to 2M - this should probably be configurable
    #       and support multiple pool sizes - e.g. 2M and 1G.
    # NOTE(jamespage): 2M in bytes
    hugepage_size = 2048 * 1024
    hugepage_config = config('hugepages')
    hugepages = None
    if hugepage_config:
        if hugepage_config.endswith('%'):
            # NOTE(jamespage): return units of virtual_memory is
            #                  bytes
            import psutil
            mem = psutil.virtual_memory()
            hugepage_config_pct = hugepage_config.strip('%')
            hugepage_multiplier = float(hugepage_config_pct) / 100
            hugepages = int((mem.total * hugepage_multiplier) / hugepage_size)
        else:
            hugepages = int(hugepage_config)
    return hugepages