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Romain Courteaud
slapos.core
Commits
2d942896
Commit
2d942896
authored
May 22, 2017
by
Tomáš Peterka
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cgroup-cpuset work only inside itself
parent
c468bb45
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1
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1 changed file
with
16 additions
and
17 deletions
+16
-17
slapos/format.py
slapos/format.py
+16
-17
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slapos/format.py
View file @
2d942896
...
...
@@ -486,7 +486,7 @@ class Computer(object):
return
pwd
.
getpwnam
(
self
.
software_user
)[
3
]
def
_prepare_cgroup
s
_folder
(
self
,
folder
):
def
_prepare_cgroup_folder
(
self
,
folder
):
"""If-Create folder and set group write permission."""
if
not
os
.
path
.
exists
(
folder
):
os
.
mkdir
(
folder
)
...
...
@@ -494,11 +494,15 @@ class Computer(object):
return
folder
def
_prepare_cgroup
s_cpuset
(
self
,
base_path
,
group
):
"""Create cgroup
s
folder per-CPU with exclusive access to the CPU.
def
_prepare_cgroup
_cpuset
(
self
):
"""Create cgroup folder per-CPU with exclusive access to the CPU.
Those folders are "
``base_path``
/cpuset/cpu<N>".
Those folders are "
/sys/fs/cgroup
/cpuset/cpu<N>".
"""
if
not
os
.
path
.
exists
(
"/sys/fs/cgroup/cpuset/cpuset.cpus"
):
self
.
logger
.
warining
(
"Cannot prepare CGROUP CPUSET - not supported by current OS"
)
return
with
open
(
"/sys/fs/cgroup/cpuset/cpuset.cpus"
,
"rt"
)
as
cpu_def
:
# build up cpu_list of available CPU IDs
cpu_list
=
[]
# types: list[int]
...
...
@@ -506,33 +510,28 @@ class Computer(object):
# IDs can be in form "0-4" or "0,1,2,3,4"
if
"-"
in
cpu_def_split
:
a
,
b
=
map
(
int
,
cpu_def_split
.
split
(
"-"
))
cpu_list
.
extend
(
range
(
a
,
b
+
1
))
# because cgroup
s'
range is inclusive
cpu_list
.
extend
(
range
(
a
,
b
+
1
))
# because cgroup
's
range is inclusive
continue
cpu_list
.
append
(
int
(
cpu_def_split
))
# For every CPU ID create an exclusive cgroup
for
cpu
in
cpu_list
:
cpu_path
=
self
.
_prepare_cgroup
s
_folder
(
os
.
path
.
join
(
base_path
,
"cpu"
+
str
(
cpu
)))
cpu_path
=
self
.
_prepare_cgroup_folder
(
os
.
path
.
join
(
"/sys/fs/cgroup/cpuset/"
,
"cpu"
+
str
(
cpu
)))
with
open
(
cpu_path
+
"/cpuset.cpus"
,
"wt"
)
as
fx
:
fx
.
write
(
str
(
cpu
))
# this cgroup manages only this cpu
with
open
(
cpu_path
+
"/cpuset.cpu_exclusive"
,
"wt"
)
as
fx
:
fx
.
write
(
"1"
)
# manages it exclusively
os
.
chown
(
cpu_path
+
"/tasks"
,
-
1
,
self
.
software_gid
)
def
_prepare_cgroups
(
self
):
"""Build CGROUPS tree exclusively for slapos.
def
prepare_cgroup
(
self
):
"""Build CGROUP tree exclusively for slapos.
- Create hierarchy of CPU sets so that every partition can have exclusive
hold of one of the CPUs.
"""
base_path
=
self
.
_prepare_cgroups_folder
(
"/sys/fs/cgroup/slapos"
)
# If cgroups-cpuset is present create exclusive cpusets "cpuN" per CPU
if
os
.
path
.
exists
(
"/sys/fs/cgroup/cpuset/cpuset.cpus"
):
self
.
_prepare_cgroups_cpuset
(
self
.
_prepare_cgroups_folder
(
os
.
path
.
join
(
base_path
,
"cpuset"
)))
self
.
_prepare_cgroup_cpuset
()
def
construct
(
self
,
alter_user
=
True
,
alter_network
=
True
,
create_tap
=
True
,
use_unique_local_address_block
=
False
):
...
...
@@ -565,7 +564,7 @@ class Computer(object):
os
.
chmod
(
self
.
software_root
,
0o755
)
# Build own CGROUPS tree for resource control
self
.
_prepare_cgroups
()
self
.
prepare_cgroup
()
# get list of instance external storage if exist
instance_external_list
=
[]
...
...
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