On 2013年11月22日 14:08, Xuesong Zhang wrote:
---
cases/pinemulator.conf | 46 +++++++++++++++++++++++++
repos/domain/pinemulator.py | 84 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 130 insertions(+)
create mode 100755 cases/pinemulator.conf
create mode 100755 repos/domain/pinemulator.py
diff --git a/cases/pinemulator.conf b/cases/pinemulator.conf
new file mode 100755
index 0000000..2f270f3
--- /dev/null
+++ b/cases/pinemulator.conf
@@ -0,0 +1,46 @@
+domain:install_linux_cdrom
+ guestname
+ $defaultname
+ guestos
+ $defaultos
+ guestarch
+ $defaultarch
+ vcpu
+ $defaultvcpu
+ memory
+ $defaultmem
+ hddriver
+ $defaulthd
+ nicdriver
+ $defaultnic
+ imageformat
+ qcow2
+
+domain:pinemulator
+ guestname
+ $defaultname
+ cpulist
+ 0-2
+
+domain:pinemulator
+ guestname
+ $defaultname
+ cpulist
+ 3
+
+domain:pinemulator
+ guestname
+ $defaultname
+ cpulist
+ 0,2
+
+domain:destroy
+ guestname
+ $defaultname
+
+
+domain:undefine
+ guestname
+ $defaultname
+
+options cleanup=enable
\ No newline at end of file
diff --git a/repos/domain/pinemulator.py b/repos/domain/pinemulator.py
new file mode 100755
index 0000000..8d7b800
--- /dev/null
+++ b/repos/domain/pinemulator.py
@@ -0,0 +1,84 @@
+#!/usr/bin/env python
+""" Query or change the pinning of domain's emulator threads to
+ host physical CPUs."""
+
+
+import libvirt
+from libvirt import libvirtError
+
+from src import sharedmod
+from utils import utils
+
+required_params = ('guestname', 'cpulist',)
+optional_params = {}
+
+def check_pinemulator(guestname, maxcpu, pininfo_after):
+ """check emulator status of the running virtual machine
+ """
+
+ cmd = "cat /var/run/libvirt/qemu/%s.pid" % guestname
+ status, pid = utils.exec_cmd(cmd, shell=True)
+ if status:
+ logger.error("failed to get the pid of domain %s" % guestname)
+ return 1
+
+ cmd = "grep Cpus_allowed_list /proc/%s/task/%s/status" % (pid[0], pid[0])
+ status, output = utils.exec_cmd(cmd, shell=True)
+ if status:
+ logger.error("failed to get Cpus_allowed_list")
+ return 1
+
+ cpu_allowed_list = output[0]
+ cpulistcheck = cpu_allowed_list.split('\t')[1]
+ pininfo_in_process = str(utils.param_to_tuple(cpulistcheck, maxcpu))
+
+ if cmp(pininfo_in_process, pininfo_after):
+ logger.error("domain emulator pin failed")
+ return 1
+ else:
+ logger.info("domain emulator pin successed")
+ return 0
+
+
+def pinemulator(params):
+ """Dynamically change the real CPUs which can be allocated to the
+ emulator process of a domain. This function requires privileged
+ access to the hypervisor. """
+ global logger
+ logger = params['logger']
+ guestname = params['guestname']
+ cpulist = params['cpulist']
+
+ logger.info("the name of virtual machine is %s" % guestname)
+ logger.info("the given cpulist is %s" % cpulist)
+
+ maxcpu = utils.get_host_cpus()
+ logger.info("%s physical cpu on host" % maxcpu)
+
+ cpumap = utils.param_to_tuple(cpulist, maxcpu)
+ if not cpumap:
+ logger.error("cpulist: Invalid format")
+ return 1
+
+ conn = sharedmod.libvirtobj['conn']
+
+ try:
+ domobj = conn.lookupByName(guestname)
+
+ pininfo_original = str(domobj.emulatorPinInfo())
+ logger.info("the original emulator pin of the domain is: %s" % \
+ pininfo_original)
+
+ logger.info("pin domain emulator to host cpu %s" % cpulist)
+ domobj.pinEmulator(cpumap)
+
+ pininfo_after = str(domobj.emulatorPinInfo())
+ logger.info("the revised emulator pin of the domain is: %s" % \
+ pininfo_after)
+
+ ret = check_pinemulator(guestname, maxcpu, pininfo_after)
+ return ret
+
+ except libvirtError, e:
+ logger.error("libvirt call failed: " + str(e))
+ return 1
ACK and pushed
Thanks
Guannan
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