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Treat zero cpu shares as a valid value

Browse Source 
Currently, <cputune><shares>0</shares></cputune> is treated
as if it were not specified.

Treat is as a valid value if it was explicitly specified
and write it to the cgroups.
This commit is contained in:
Ján Tomko 2014-03-04 12:39:46 +01:00
parent c668cd50cb
commit bdffab0d5c
14 changed files with 69 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/conf/domain_conf.c
View File

@ -11543,11 +11543,13 @@ virDomainDefParseXML(xmlDocPtr xml,
}
/* Extract cpu tunables. */
if (virXPathULong("string(./cputune/shares[1])", ctxt,
&def->cputune.shares) < -1) {
if ((n = virXPathULong("string(./cputune/shares[1])", ctxt,
&def->cputune.shares)) < -1) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("can't parse cputune shares value"));
goto error;
} else if (n == 0) {
def->cputune.sharesSpecified = true;
}
if (virXPathULongLong("string(./cputune/period[1])", ctxt,
@ -17276,7 +17278,7 @@ virDomainDefFormatInternal(virDomainDefPtr def,
virBufferAsprintf(buf, " current='%u'", def->vcpus);
virBufferAsprintf(buf, ">%u</vcpu>\n", def->maxvcpus);
if (def->cputune.shares ||
if (def->cputune.sharesSpecified ||
(def->cputune.nvcpupin && !virDomainIsAllVcpupinInherited(def)) ||
def->cputune.period || def->cputune.quota ||
def->cputune.emulatorpin ||
@ -17284,7 +17286,7 @@ virDomainDefFormatInternal(virDomainDefPtr def,
virBufferAddLit(buf, "<cputune>\n");
virBufferAdjustIndent(buf, 2);
if (def->cputune.shares)
if (def->cputune.sharesSpecified)
virBufferAsprintf(buf, "<shares>%lu</shares>\n",
def->cputune.shares);
if (def->cputune.period)
@ -17339,7 +17341,7 @@ virDomainDefFormatInternal(virDomainDefPtr def,
VIR_FREE(cpumask);
}
virBufferAdjustIndent(buf, -2);
if (def->cputune.shares ||
if (def->cputune.sharesSpecified ||
(def->cputune.nvcpupin && !virDomainIsAllVcpupinInherited(def)) ||
def->cputune.period || def->cputune.quota ||
def->cputune.emulatorpin ||

1
src/conf/domain_conf.h
View File

@ -2011,6 +2011,7 @@ struct _virDomainDef {
struct {
unsigned long shares;
bool sharesSpecified;
unsigned long long period;
long long quota;
unsigned long long emulator_period;

2
src/lxc/lxc_cgroup.c
View File

@ -38,7 +38,7 @@ static int virLXCCgroupSetupCpuTune(virDomainDefPtr def,
virCgroupPtr cgroup)
{
int ret = -1;
if (def->cputune.shares != 0 &&
if (def->cputune.sharesSpecified &&
virCgroupSetCpuShares(cgroup, def->cputune.shares) < 0)
goto cleanup;

2
src/lxc/lxc_driver.c
View File

@ -1902,10 +1902,12 @@ lxcDomainSetSchedulerParametersFlags(virDomainPtr dom,
goto cleanup;
vm->def->cputune.shares = params[i].value.ul;
vm->def->cputune.sharesSpecified = true;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
vmdef->cputune.shares = params[i].value.ul;
vmdef->cputune.sharesSpecified = true;
}
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_VCPU_PERIOD)) {
if (flags & VIR_DOMAIN_AFFECT_LIVE) {

8
src/lxc/lxc_native.c
View File

@ -678,9 +678,11 @@ lxcSetCpuTune(virDomainDefPtr def, virConfPtr properties)
virConfValuePtr value;
if ((value = virConfGetValue(properties, "lxc.cgroup.cpu.shares")) &&
value->str && virStrToLong_ul(value->str, NULL, 10,
&def->cputune.shares) < 0)
goto error;
value->str) {
if (virStrToLong_ul(value->str, NULL, 10, &def->cputune.shares) < 0)
goto error;
def->cputune.sharesSpecified = true;
}
if ((value = virConfGetValue(properties,
"lxc.cgroup.cpu.cfs_quota_us")) &&

1
src/parallels/parallels_driver.c
View File

@ -2051,6 +2051,7 @@ parallelsApplyChanges(virConnectPtr conn, virDomainObjPtr dom, virDomainDefPtr n
}
if (old->cputune.shares != new->cputune.shares ||
old->cputune.sharesSpecified != new->cputune.sharesSpecified ||
old->cputune.period != new->cputune.period ||
old->cputune.quota != new->cputune.quota ||
old->cputune.nvcpupin != new->cputune.nvcpupin) {

4
src/qemu/qemu_cgroup.c
View File

@ -646,7 +646,7 @@ qemuSetupCpuCgroup(virDomainObjPtr vm)
qemuDomainObjPrivatePtr priv = vm->privateData;
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
if (vm->def->cputune.shares) {
if (vm->def->cputune.sharesSpecified) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("CPU tuning is not available on this host"));
return -1;
@ -655,7 +655,7 @@ qemuSetupCpuCgroup(virDomainObjPtr vm)
}
}
if (vm->def->cputune.shares &&
if (vm->def->cputune.sharesSpecified &&
virCgroupSetCpuShares(priv->cgroup, vm->def->cputune.shares) < 0)
return -1;

2
src/qemu/qemu_command.c
View File

@ -7784,7 +7784,7 @@ qemuBuildCommandLine(virConnectPtr conn,
goto error;
}
if (def->cputune.shares || def->cputune.period ||
if (def->cputune.sharesSpecified || def->cputune.period ||
def->cputune.quota || def->cputune.emulator_period ||
def->cputune.emulator_quota) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",

6
src/qemu/qemu_driver.c
View File

@ -9088,10 +9088,14 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
if (virCgroupSetCpuShares(priv->cgroup, value_ul) < 0)
goto cleanup;
vm->def->cputune.shares = value_ul;
vm->def->cputune.sharesSpecified = true;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG)
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
vmdef->cputune.shares = value_ul;
vmdef->cputune.sharesSpecified = true;
}
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_VCPU_PERIOD)) {
SCHED_RANGE_CHECK(value_ul, VIR_DOMAIN_SCHEDULER_VCPU_PERIOD,

3
src/vmx/vmx.c
View File

@ -1511,6 +1511,7 @@ virVMXParseConfig(virVMXContext *ctx,
"found '%s'"), sched_cpu_shares);
goto cleanup;
}
def->cputune.sharesSpecified = true;
}
/* def:lifecycle */
@ -3196,7 +3197,7 @@ virVMXFormatConfig(virVMXContext *ctx, virDomainXMLOptionPtr xmlopt, virDomainDe
}
/* def:cputune.shares -> vmx:sched.cpu.shares */
if (def->cputune.shares > 0) {
if (def->cputune.sharesSpecified) {
/* See http://www.vmware.com/support/developer/vc-sdk/visdk41pubs/ApiReference/vim.SharesInfo.Level.html */
if (def->cputune.shares == def->vcpus * 500) {
virBufferAddLit(&buffer, "sched.cpu.shares = \"low\"\n");

5
tests/qemuxml2argvdata/qemuxml2argv-cputune-zero-shares.args Normal file
View File

@ -0,0 +1,5 @@
LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
/usr/bin/qemu \
-name QEMUGuest1 -S -M pc -m 214 -smp 2 -nographic \
-monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -usb \
-hda /dev/HostVG/QEMUGuest1 -net none -serial none -parallel none

35
tests/qemuxml2argvdata/qemuxml2argv-cputune-zero-shares.xml Normal file
View File

@ -0,0 +1,35 @@
<domain type='qemu'>
<name>QEMUGuest1</name>
<uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
<memory unit='KiB'>219136</memory>
<currentMemory unit='KiB'>219136</currentMemory>
<vcpu placement='static'>2</vcpu>
<cputune>
<shares>0</shares>
<period>1000000</period>
<quota>-1</quota>
<vcpupin vcpu='0' cpuset='0'/>
<vcpupin vcpu='1' cpuset='1'/>
<emulatorpin cpuset='1'/>
</cputune>
<os>
<type arch='i686' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/bin/qemu</emulator>
<disk type='block' device='disk'>
<source dev='/dev/HostVG/QEMUGuest1'/>
<target dev='hda' bus='ide'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='usb' index='0'/>
<controller type='ide' index='0'/>
<controller type='pci' index='0' model='pci-root'/>
<memballoon model='virtio'/>
</devices>
</domain>

1
tests/qemuxml2argvtest.c
View File

@ -1163,6 +1163,7 @@ mymain(void)
DO_TEST("blkiotune", QEMU_CAPS_NAME);
DO_TEST("blkiotune-device", QEMU_CAPS_NAME);
DO_TEST("cputune", QEMU_CAPS_NAME);
DO_TEST("cputune-zero-shares", QEMU_CAPS_NAME);
DO_TEST("numatune-memory", NONE);
DO_TEST("numatune-auto-nodeset-invalid", NONE);
DO_TEST("numad", NONE);

1
tests/qemuxml2xmltest.c
View File

@ -260,6 +260,7 @@ mymain(void)
DO_TEST("blkiotune");
DO_TEST("blkiotune-device");
DO_TEST("cputune");
DO_TEST("cputune-zero-shares");
DO_TEST("smp");
DO_TEST("lease");