# coding=utf-8
#
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2019 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT
import mmap
__author__ = 'shaman'
# bytes count in big values (kilobytes, megabytes, etc.)
BYTE_SIZES = [
{"value": 1099511627776, "title": "TB"},
{"value": 1073741824, "title": "GB"},
{"value": 1048576, "title": "MB"},
{"value": 1024, "title": "KB"}
]
POWERS_OF_1000_SIZES = [
{"value": 1000000000000, "title": "T"},
{"value": 1000000000, "title": "G"},
{"value": 1000000, "title": "M"},
{"value": 1000, "title": "K"}
]
PAGE_SIZE = mmap.PAGESIZE # Memory page size; as usualy 4096
def convert(value, powers_of_1000, for_graph):
"""
Convert bytes value to human readable format (e.g., 4K 347M 7G)
for write it on graphics.
Return 2-digit value - float or digital. Depends on original value.
The rules are:
For graphs:
print int if it is an int or it is more then 10
Not for graphs:
if it is > 100, or units are B or no units (KB/MB/GB/K/M/G will print as float)
>>> convert(12345678, False, True)
'11MB'
>>> convert(1234567, False, True)
'1.2MB'
"""
result = float(value)
if powers_of_1000:
sizes_list = POWERS_OF_1000_SIZES
title = ''
else:
sizes_list = BYTE_SIZES
title = 'B'
for item in sizes_list:
if value >= item["value"]:
result = float(value) / item["value"]
title = item["title"]
break
if (for_graph and (result >= 10 or result.is_integer())) or result >= 100 or \
((title == 'B' or title == '') and not for_graph):
return f"{int(result)}{title}"
else:
return f"{result:.1f}{title}"
def convert_bytes(s_bytes):
return convert(s_bytes, False, False)
def convert_bytes_for_graph(s_bytes):
return convert(s_bytes, False, True)
def convert_powers_of_1000(value):
return convert(value, True, False)
def convert_powers_of_1000_for_graph(value):
return convert(value, True, True)
def mempages_to_bytes(pages):
"""
Convert memory pages to bytes
:param int pages: memory pages
:return int: bytes
"""
return int(round(pages * PAGE_SIZE))
def dbgov_io_bytes_value(io_read_mb, io_write_mb):
"""
Convert two (read and write) io values (in MB) from MySQL Governor to single value in bytes
:param io_read_mb: IO read value in MB
:param io_write_mb: IO write value in MB
:return: IO value in bytes
"""
return int((io_read_mb + io_write_mb) * 1024 * 1024)
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