def devstat():
if sysctl.sysctl ('kern.devstat.version', 1) != 4:
raise SystemError("devstat(9) version has changed")
data = sysctl.sysctl ('kern.devstat.all', 0)
devices = {}
for i in range (0, len(data), devstat_size):
sub = data[i:i + devstat_size]
if len(sub) != devstat_size:
# there are an extra four bytes tacked on to the end.
# don't know what they're about. padding? They always
# seem to be ' \000\000\000'
break
else:
info = struct.unpack (devstat_format, sub)
ds = devstat_struct()
(ds.dev_links0, ds.dev_links1,
device_number, ds.device_name, ds.unit_number,
ds.bytes_read, ds.bytes_written, ds.bytes_freed,
ds.num_reads, ds.num_writes, ds.num_frees, ds.num_other,
ds.busy_count, ds.block_size,
ds.tag_types0, ds.tag_types1, ds.tag_types2,
ds.dev_creation_time0, ds.dev_creation_time1,
ds.busy_time0, ds.busy_time1,
ds.start_time0, ds.start_time1,
ds.last_comp_time0, ds.last_comp_time1,
enums
) = info
ds.cleanup()
devices[ds.device_name] = ds
return devices
def devstat():
if sysctl.sysctl ('kern.devstat.version', 1) != 4:
raise SystemError, "devstat(9) version has changed"
data = sysctl.sysctl ('kern.devstat.all', 0)
devices = {}
for i in range (0, len(data), devstat_size):
sub = data[i:i+devstat_size]
if len(sub) != devstat_size:
# there are an extra four bytes tacked on to the end.
# don't know what they're about. padding? They always
# seem to be ' \000\000\000'
break
else:
info = struct.unpack (devstat_format, sub)
ds = devstat_struct()
(ds.dev_links0, ds.dev_links1,
device_number, ds.device_name, ds.unit_number,
ds.bytes_read, ds.bytes_written, ds.bytes_freed,
ds.num_reads, ds.num_writes, ds.num_frees, ds.num_other,
ds.busy_count, ds.block_size,
ds.tag_types0, ds.tag_types1, ds.tag_types2,
ds.dev_creation_time0, ds.dev_creation_time1,
ds.busy_time0, ds.busy_time1,
ds.start_time0, ds.start_time1,
ds.last_comp_time0, ds.last_comp_time1,
enums
) = info
ds.cleanup()
devices[ds.device_name] = ds
return devices
def get():
(peak_mbufs, clusters, spare, clfree, drops, wait, drain, mcfail, mpfail,
msize, mclbytes, minclsize, mlen,
mhlen) = struct.unpack(14 * 'l', sysctl.sysctl('kern.ipc.mbstat'))
(max_mbufs, ) = struct.unpack('l', sysctl.sysctl('kern.ipc.nmbufs'))
(max_mbclusters, ) = struct.unpack('l',
sysctl.sysctl('kern.ipc.nmbclusters'))
free_mbufs, current_mbufs = get_current_mbufs()
return locals()
def get():
(peak_mbufs, clusters, spare, clfree,
drops, wait, drain, mcfail, mpfail,
msize, mclbytes, minclsize, mlen, mhlen
) = struct.unpack (14 * 'l', sysctl.sysctl ('kern.ipc.mbstat'))
(max_mbufs,) = struct.unpack ('l', sysctl.sysctl ('kern.ipc.nmbufs'))
(max_mbclusters,) = struct.unpack ('l', sysctl.sysctl ('kern.ipc.nmbclusters'))
free_mbufs, current_mbufs = get_current_mbufs()
return locals()
def verify_resource (name, minval):
try:
x = sysctl.sysctl (name, 1)
except:
raise SystemError("Failed to query sysctl MIB '%s': %s" % (name, tb.traceback_string()))
else:
if x < minval:
raise SystemError(
"The sysctl MIB '%s' has value '%d', which is less than the required minimum value of '%d'" %
(name, x, minval))
def verify_resource(name, minval):
try:
x = sysctl.sysctl(name, 1)
except:
raise SystemError, "Failed to query sysctl MIB '%s': %s" % (
name, tb.traceback_string())
else:
if x < minval:
raise SystemError, "The sysctl MIB '%s' has value '%d', which is less than the required minimum value of '%d'" % (
name, x, minval)
def get_current_mbufs():
data = sysctl.sysctl('kern.ipc.mbtypes')
nelems = len(data) / 4
nums = struct.unpack(nelems * 'l', data)
free = nums[0]
return free, reduce(operator.add, nums[1:])
BEWARE! THIS WILL DESTROY ANYTHING ON THAT DEVICE OR FILE!
"""
USING_LISTIO = 0
MAX_LIO = 0
try:
import lio_listio
except ImportError:
if hasattr(coro, 'lio_read'):
USING_LISTIO = 1
else:
USING_LISTIO = 0
if USING_LISTIO:
MAX_LIO = sysctl.sysctl('p1003_1b.aio_listio_max', 1)
if MAX_LIO:
USING_LISTIO = 1
else:
USING_LISTIO = 0
# 512 bytes
DISK_BLOCK_SIZE = (1<<9)
DISK_BLOCK_MASK = ((1<<9)-1)
# fall 512 bytes shy of a full 64K, this will avoid wasting an entire
# 32K malloc block to hold the extra 24 bytes of Python object
# overhead.
MAX_LIO_SIZE = ((64 * 1024) - DISK_BLOCK_SIZE)
assert ((MAX_LIO_SIZE % DISK_BLOCK_SIZE) == 0)
def get_current_mbufs():
data = sysctl.sysctl ('kern.ipc.mbtypes')
nelems = len(data) / 4
nums = struct.unpack (nelems * 'l', data)
free = nums[0]
return free, reduce (operator.add, nums[1:])
