* repos/domain/set_cpu_shares.py: set the value of cpu_shares
property of the guest.
---
repos/domain/set_cpu_shares.py | 111 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 111 insertions(+), 0 deletions(-)
create mode 100644 repos/domain/set_cpu_shares.py
diff --git a/repos/domain/set_cpu_shares.py b/repos/domain/set_cpu_shares.py
new file mode 100644
index 0000000..4560809
--- /dev/null
+++ b/repos/domain/set_cpu_shares.py
@@ -0,0 +1,111 @@
+#!/usr/bin/env python
+"""Set the value of cpu_shares property of the guest
+ domain:set_cpu_shares
+ guestname
+ xxx
+ flags
+ 0|1|2
+"""
+
+__author__ = 'Nan Zhang: nzhang@xxxxxxxxxx'
+__date__ = 'Tue Sep 27, 2011'
+__version__ = '0.1.0'
+__credits__ = 'Copyright (C) 2011 Red Hat, Inc.'
+__all__ = ['check_params', 'check_cpu_shares', 'set_cpu_shares']
+
+import os
+import re
+import sys
+import time
+from xml.dom import minidom
+
+
+def append_path(path):
+ """Append root path of package"""
+ if path in sys.path:
+ pass
+ else:
+ sys.path.append(path)
+
+pwd = os.getcwd()
+result = re.search('(.*)libvirt-test-API', pwd)
+append_path(result.group(0))
+
+from lib import connectAPI
+from lib import domainAPI
+from utils.Python import utils
+from utils.Python import xmlbuilder
+from exception import LibvirtAPI
+
+def check_params(params):
+ """Verify inputing parameter dictionary"""
+ logger = params['logger']
+ keys = ['guestname', 'flags']
+ for key in keys:
+ if key not in params:
+ logger.error("%s is required" %key)
+ return 1
+ return 0
+
+def check_cpu_shares(params, util, guestname, cpu_shares):
+ """Check the value of cpu_shares"""
+ logger = params['logger']
+ cmd = "cat /cgroup/cpu/libvirt/qemu/%s/cpu.shares" % guestname
+ ret, out = util.exec_cmd(cmd, shell=True)
+ if ret:
+ logger.error("fail to set the value of cpu_shares: %s" % out[0])
+ return 0
+ else:
+ logger.info("from cgroup, the value of cpu_shares is %s" % out[0])
+
+ if cmp(int(out[0]), cpu_shares):
+ return 1
+ else:
+ logger.info("the value of cpu_shares does match the original \
+cpu scheduler information.")
+ return 0
+
+def set_cpu_shares(params):
+ """Get the cpu scheduler information"""
+ # Initiate and check parameters
+ params_check_result = check_params(params)
+ if params_check_result:
+ return 1
+ logger = params['logger']
+ guestname = params['guestname']
+ flags = params['flags']
+ schedinfo = {}
+ schedinfo['cpu_shares'] = 2048
+ cpu_shares = schedinfo['cpu_shares']
+
+ # Connect to local hypervisor connection URI
+ util = utils.Utils()
+ uri = util.get_uri('127.0.0.1')
+ conn = connectAPI.ConnectAPI()
+ virconn = conn.open(uri)
+
+ caps = conn.get_caps()
+ logger.debug(caps)
+
+ domobj = domainAPI.DomainAPI(virconn)
+ try:
+ domobj.set_sched_params_flags(guestname, schedinfo, int(flags))
+ logger.debug("set the value of cpu_shares with %s" % cpu_shares)
+ except LibvirtAPI, e:
+ logger.error("API error message: %s, error code is %s" %
+ (e.response()['message'], e.response()['code']))
+ return 1
+
+ check_result = check_cpu_shares(params, util, guestname, cpu_shares)
+ if check_result:
+ logger.error("cpu_shares does not match.")
+ conn.close()
+ return 1
+
+ logger.info("success to set scheduler parameters.")
+ conn.close()
+ return 0
+
+def set_cpu_shares_clean():
+ """Clean testing environment"""
+ pass
--
1.7.4.4
--
libvir-list mailing list
libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list