[libvirt] [PATCH v4 4/9] Move iothreadspin information into iothreadids
John Ferlan
jferlan at redhat.com
Tue Apr 21 23:31:25 UTC 2015
Remove the iothreadspin array from cputune and replace with a cpumask
to be stored in the iothreadids list
Signed-off-by: John Ferlan <jferlan at redhat.com>
---
docs/formatdomain.html.in | 10 ++--
src/conf/domain_conf.c | 118 +++++++++++++++++++++-------------------------
src/conf/domain_conf.h | 2 +-
src/qemu/qemu_cgroup.c | 13 ++---
src/qemu/qemu_driver.c | 79 +++++++++----------------------
src/qemu/qemu_process.c | 7 +--
6 files changed, 86 insertions(+), 143 deletions(-)
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 518f7c5..7af6bd7 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -624,11 +624,11 @@
and attribute <code>cpuset</code> of element <code>vcpu</code> is
not specified, the IOThreads are pinned to all the physical CPUs
by default. There are two required attributes, the attribute
- <code>iothread</code> specifies the IOThread id and the attribute
- <code>cpuset</code> specifying which physical CPUs to pin to. The
- <code>iothread</code> value begins at "1" through the number of
- <a href="#elementsIOThreadsAllocation"><code>iothreads</code></a>
- allocated to the domain. A value of "0" is not permitted.
+ <code>iothread</code> specifies the IOThread ID and the attribute
+ <code>cpuset</code> specifying which physical CPUs to pin to. See
+ the <code>iothreadids</code>
+ <a href="#elementsIOThreadsAllocation"><code>description</code></a>
+ for valid <code>iothread</code> values.
<span class="since">Since 1.2.9</span>
</dd>
<dt><code>shares</code></dt>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index bd25d52..969e56f 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -2118,8 +2118,10 @@ virDomainPinDefCopy(virDomainPinDefPtr *src, int npin)
void
virDomainIOThreadIDDefFree(virDomainIOThreadIDDefPtr def)
{
- if (def)
+ if (def) {
+ virBitmapFree(def->cpumask);
VIR_FREE(def);
+ }
}
@@ -2341,9 +2343,6 @@ void virDomainDefFree(virDomainDefPtr def)
virDomainPinDefFree(def->cputune.emulatorpin);
- virDomainPinDefArrayFree(def->cputune.iothreadspin,
- def->cputune.niothreadspin);
-
for (i = 0; i < def->cputune.nvcpusched; i++)
virBitmapFree(def->cputune.vcpusched[i].ids);
VIR_FREE(def->cputune.vcpusched);
@@ -13316,74 +13315,77 @@ virDomainVcpuPinDefParseXML(xmlNodePtr node,
* and an iothreadspin has the form
* <iothreadpin iothread='1' cpuset='2'/>
*/
-static virDomainPinDefPtr
+static int
virDomainIOThreadPinDefParseXML(xmlNodePtr node,
xmlXPathContextPtr ctxt,
- int iothreads)
+ virDomainDefPtr def)
{
- virDomainPinDefPtr def;
+ int ret = -1;
+ virDomainIOThreadIDDefPtr iothrid;
+ virBitmapPtr cpumask;
xmlNodePtr oldnode = ctxt->node;
unsigned int iothreadid;
char *tmp = NULL;
- if (VIR_ALLOC(def) < 0)
- return NULL;
-
ctxt->node = node;
if (!(tmp = virXPathString("string(./@iothread)", ctxt))) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("missing iothread id in iothreadpin"));
- goto error;
+ goto cleanup;
}
if (virStrToLong_uip(tmp, NULL, 10, &iothreadid) < 0) {
virReportError(VIR_ERR_XML_ERROR,
_("invalid setting for iothread '%s'"), tmp);
- goto error;
+ goto cleanup;
}
VIR_FREE(tmp);
if (iothreadid == 0) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("zero is an invalid iothread id value"));
- goto error;
- }
-
- /* IOThreads are numbered "iothread1...iothread<n>", where
- * "n" is the iothreads value */
- if (iothreadid > iothreads) {
- virReportError(VIR_ERR_XML_ERROR, "%s",
- _("iothread id must not exceed iothreads"));
- goto error;
+ goto cleanup;
}
- def->id = iothreadid;
-
if (!(tmp = virXMLPropString(node, "cpuset"))) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("missing cpuset for iothreadpin"));
- goto error;
+ goto cleanup;
}
- if (virBitmapParse(tmp, 0, &def->cpumask, VIR_DOMAIN_CPUMASK_LEN) < 0)
- goto error;
+ if (virBitmapParse(tmp, 0, &cpumask, VIR_DOMAIN_CPUMASK_LEN) < 0)
+ goto cleanup;
- if (virBitmapIsAllClear(def->cpumask)) {
+ if (virBitmapIsAllClear(cpumask)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Invalid value of 'cpuset': %s"),
tmp);
- goto error;
+ goto cleanup;
+ }
+
+ if (!(iothrid = virDomainIOThreadIDFind(def, iothreadid))) {
+ if (!(iothrid = virDomainIOThreadIDAdd(def, iothreadid)))
+ goto cleanup;
+ iothrid->autofill = true;
+ }
+
+ if (iothrid->cpumask) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("duplicate iothreadpin for same iothread '%u'"),
+ iothreadid);
+ goto cleanup;
}
+ iothrid->cpumask = cpumask;
+ cpumask = NULL;
+ ret = 0;
+
cleanup:
VIR_FREE(tmp);
+ virBitmapFree(cpumask);
ctxt->node = oldnode;
- return def;
-
- error:
- VIR_FREE(def);
- goto cleanup;
+ return ret;
}
@@ -14250,28 +14252,11 @@ virDomainDefParseXML(xmlDocPtr xml,
goto error;
}
- if (n && VIR_ALLOC_N(def->cputune.iothreadspin, n) < 0)
- goto error;
-
for (i = 0; i < n; i++) {
- virDomainPinDefPtr iothreadpin = NULL;
- iothreadpin = virDomainIOThreadPinDefParseXML(nodes[i], ctxt,
- def->iothreads);
- if (!iothreadpin)
+ if (virDomainIOThreadPinDefParseXML(nodes[i], ctxt, def) < 0)
goto error;
-
- if (virDomainPinIsDuplicate(def->cputune.iothreadspin,
- def->cputune.niothreadspin,
- iothreadpin->id)) {
- virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
- _("duplicate iothreadpin for same iothread"));
- virDomainPinDefFree(iothreadpin);
- goto error;
- }
-
- def->cputune.iothreadspin[def->cputune.niothreadspin++] =
- iothreadpin;
}
+ def->cputune.niothreadspin = n;
VIR_FREE(nodes);
if ((n = virXPathNodeSet("./cputune/vcpusched", ctxt, &nodes)) < 0) {
@@ -14384,7 +14369,7 @@ virDomainDefParseXML(xmlDocPtr xml,
if (virDomainNumatuneHasPlacementAuto(def->numa) &&
!def->cpumask && !def->cputune.vcpupin &&
- !def->cputune.emulatorpin && !def->cputune.iothreadspin)
+ !def->cputune.emulatorpin && !def->cputune.niothreadspin)
def->placement_mode = VIR_DOMAIN_CPU_PLACEMENT_MODE_AUTO;
if ((n = virXPathNodeSet("./resource", ctxt, &nodes)) < 0) {
@@ -20837,20 +20822,25 @@ virDomainDefFormatInternal(virDomainDefPtr def,
VIR_FREE(cpumask);
}
- for (i = 0; i < def->cputune.niothreadspin; i++) {
- char *cpumask;
- /* Ignore the iothreadpin which inherit from "cpuset of "<vcpu>." */
- if (virBitmapEqual(def->cpumask, def->cputune.iothreadspin[i]->cpumask))
- continue;
+ if (def->cputune.niothreadspin) {
+ for (i = 0; i < def->niothreadids; i++) {
+ char *cpumask;
- virBufferAsprintf(buf, "<iothreadpin iothread='%u' ",
- def->cputune.iothreadspin[i]->id);
+ /* Ignore iothreadids with no cpumask or a cpumask that
+ * inherits from "cpuset of "<vcpu>." */
+ if (!def->iothreadids[i]->cpumask ||
+ virBitmapEqual(def->cpumask, def->iothreadids[i]->cpumask))
+ continue;
- if (!(cpumask = virBitmapFormat(def->cputune.iothreadspin[i]->cpumask)))
- goto error;
+ virBufferAsprintf(buf, "<iothreadpin iothread='%u' ",
+ def->iothreadids[i]->iothread_id);
- virBufferAsprintf(buf, "cpuset='%s'/>\n", cpumask);
- VIR_FREE(cpumask);
+ if (!(cpumask = virBitmapFormat(def->iothreadids[i]->cpumask)))
+ goto error;
+
+ virBufferAsprintf(buf, "cpuset='%s'/>\n", cpumask);
+ VIR_FREE(cpumask);
+ }
}
for (i = 0; i < def->cputune.nvcpusched; i++) {
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index cc98f3d..c71e1b8 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2057,6 +2057,7 @@ struct _virDomainIOThreadIDDef {
bool autofill;
unsigned int iothread_id;
int thread_id;
+ virBitmapPtr cpumask;
};
void virDomainIOThreadIDDefFree(virDomainIOThreadIDDefPtr def);
@@ -2075,7 +2076,6 @@ struct _virDomainCputune {
virDomainPinDefPtr *vcpupin;
virDomainPinDefPtr emulatorpin;
size_t niothreadspin;
- virDomainPinDefPtr *iothreadspin;
size_t nvcpusched;
virDomainThreadSchedParamPtr vcpusched;
diff --git a/src/qemu/qemu_cgroup.c b/src/qemu/qemu_cgroup.c
index cdf0aaf..5282449 100644
--- a/src/qemu/qemu_cgroup.c
+++ b/src/qemu/qemu_cgroup.c
@@ -1149,7 +1149,7 @@ qemuSetupCgroupForIOThreads(virDomainObjPtr vm)
virCgroupPtr cgroup_iothread = NULL;
qemuDomainObjPrivatePtr priv = vm->privateData;
virDomainDefPtr def = vm->def;
- size_t i, j;
+ size_t i;
unsigned long long period = vm->def->cputune.period;
long long quota = vm->def->cputune.quota;
char *mem_mask = NULL;
@@ -1214,18 +1214,11 @@ qemuSetupCgroupForIOThreads(virDomainObjPtr vm)
/* default cpu masks */
if (def->placement_mode == VIR_DOMAIN_CPU_PLACEMENT_MODE_AUTO)
cpumask = priv->autoCpuset;
+ else if (def->iothreadids[i]->cpumask)
+ cpumask = def->iothreadids[i]->cpumask;
else
cpumask = def->cpumask;
- /* specific cpu mask */
- for (j = 0; j < def->cputune.niothreadspin; j++) {
- if (def->cputune.iothreadspin[j]->id ==
- def->iothreadids[i]->iothread_id) {
- cpumask = def->cputune.iothreadspin[j]->cpumask;
- break;
- }
- }
-
if (cpumask &&
qemuSetupCgroupCpusetCpus(cgroup_iothread, cpumask) < 0)
goto cleanup;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 0f95cc7..ee13d08 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -5894,19 +5894,14 @@ qemuDomainGetIOThreadsConfig(virDomainDefPtr targetDef,
goto cleanup;
for (i = 0; i < targetDef->niothreadids; i++) {
- virDomainPinDefPtr pininfo;
-
if (VIR_ALLOC(info_ret[i]) < 0)
goto cleanup;
/* IOThread ID's are taken from the iothreadids list */
info_ret[i]->iothread_id = targetDef->iothreadids[i]->iothread_id;
- /* Initialize the cpumap */
- pininfo = virDomainPinFind(targetDef->cputune.iothreadspin,
- targetDef->cputune.niothreadspin,
- targetDef->iothreadids[i]->iothread_id);
- if (!pininfo) {
+ cpumask = targetDef->iothreadids[i]->cpumask;
+ if (!cpumask) {
if (targetDef->cpumask) {
cpumask = targetDef->cpumask;
} else {
@@ -5915,8 +5910,6 @@ qemuDomainGetIOThreadsConfig(virDomainDefPtr targetDef,
virBitmapSetAll(bitmap);
cpumask = bitmap;
}
- } else {
- cpumask = pininfo->cpumask;
}
if (virBitmapToData(cpumask, &info_ret[i]->cpumap,
&info_ret[i]->cpumaplen) < 0)
@@ -5999,8 +5992,6 @@ qemuDomainPinIOThread(virDomainPtr dom,
virDomainDefPtr persistentDef = NULL;
virBitmapPtr pcpumap = NULL;
qemuDomainObjPrivatePtr priv;
- virDomainPinDefPtr *newIOThreadsPin = NULL;
- size_t newIOThreadsPinNum = 0;
virCgroupPtr cgroup_iothread = NULL;
virObjectEventPtr event = NULL;
char paramField[VIR_TYPED_PARAM_FIELD_LENGTH] = "";
@@ -6050,33 +6041,21 @@ qemuDomainPinIOThread(virDomainPtr dom,
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
virDomainIOThreadIDDefPtr iothrid;
+ virBitmapPtr cpumask;
if (!(iothrid = virDomainIOThreadIDFind(vm->def, iothread_id))) {
virReportError(VIR_ERR_INVALID_ARG,
- _("iothread value %d not found"), iothread_id);
+ _("iothreadid %d not found"), iothread_id);
goto endjob;
}
- if (vm->def->cputune.iothreadspin) {
- newIOThreadsPin =
- virDomainPinDefCopy(vm->def->cputune.iothreadspin,
- vm->def->cputune.niothreadspin);
- if (!newIOThreadsPin)
- goto endjob;
-
- newIOThreadsPinNum = vm->def->cputune.niothreadspin;
- } else {
- if (VIR_ALLOC(newIOThreadsPin) < 0)
- goto endjob;
- newIOThreadsPinNum = 0;
- }
-
- if (virDomainPinAdd(&newIOThreadsPin, &newIOThreadsPinNum,
- cpumap, maplen, iothread_id) < 0) {
- virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
- _("failed to update iothreadspin"));
+ if (!(cpumask = virBitmapNewData(cpumap, maplen)))
goto endjob;
- }
+
+ if (!iothrid->cpumask)
+ vm->def->cputune.niothreadspin++;
+ virBitmapFree(iothrid->cpumask);
+ iothrid->cpumask = cpumask;
/* Configure the corresponding cpuset cgroup before set affinity. */
if (virCgroupHasController(priv->cgroup,
@@ -6099,14 +6078,6 @@ qemuDomainPinIOThread(virDomainPtr dom,
}
}
- if (vm->def->cputune.iothreadspin)
- virDomainPinDefArrayFree(vm->def->cputune.iothreadspin,
- vm->def->cputune.niothreadspin);
-
- vm->def->cputune.iothreadspin = newIOThreadsPin;
- vm->def->cputune.niothreadspin = newIOThreadsPinNum;
- newIOThreadsPin = NULL;
-
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
goto endjob;
@@ -6124,31 +6095,25 @@ qemuDomainPinIOThread(virDomainPtr dom,
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
+ virDomainIOThreadIDDefPtr iothrid;
+ virBitmapPtr cpumask;
+
/* Coverity didn't realize that targetDef must be set if we got here. */
sa_assert(persistentDef);
- if (iothread_id > persistentDef->iothreads) {
+ if (!(iothrid = virDomainIOThreadIDFind(persistentDef, iothread_id))) {
virReportError(VIR_ERR_INVALID_ARG,
- _("iothread value out of range %d > %d"),
- iothread_id, persistentDef->iothreads);
+ _("iothreadid %d not found"), iothread_id);
goto endjob;
}
- if (!persistentDef->cputune.iothreadspin) {
- if (VIR_ALLOC(persistentDef->cputune.iothreadspin) < 0)
- goto endjob;
- persistentDef->cputune.niothreadspin = 0;
- }
- if (virDomainPinAdd(&persistentDef->cputune.iothreadspin,
- &persistentDef->cputune.niothreadspin,
- cpumap,
- maplen,
- iothread_id) < 0) {
- virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
- _("failed to update or add iothreadspin xml "
- "of a persistent domain"));
+ if (!(cpumask = virBitmapNewData(cpumap, maplen)))
goto endjob;
- }
+
+ if (!iothrid->cpumask)
+ persistentDef->cputune.niothreadspin++;
+ virBitmapFree(iothrid->cpumask);
+ iothrid->cpumask = cpumask;
ret = virDomainSaveConfig(cfg->configDir, persistentDef);
goto endjob;
@@ -6160,8 +6125,6 @@ qemuDomainPinIOThread(virDomainPtr dom,
qemuDomainObjEndJob(driver, vm);
cleanup:
- if (newIOThreadsPin)
- virDomainPinDefArrayFree(newIOThreadsPin, newIOThreadsPinNum);
if (cgroup_iothread)
virCgroupFree(&cgroup_iothread);
if (event)
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 717d113..09263e9 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -2458,7 +2458,6 @@ static int
qemuProcessSetIOThreadsAffinity(virDomainObjPtr vm)
{
virDomainDefPtr def = vm->def;
- virDomainPinDefPtr pininfo;
size_t i;
int ret = -1;
@@ -2467,13 +2466,11 @@ qemuProcessSetIOThreadsAffinity(virDomainObjPtr vm)
for (i = 0; i < def->niothreadids; i++) {
/* set affinity only for existing iothreads */
- if (!(pininfo = virDomainPinFind(def->cputune.iothreadspin,
- def->cputune.niothreadspin,
- def->iothreadids[i]->iothread_id)))
+ if (!def->iothreadids[i]->cpumask)
continue;
if (virProcessSetAffinity(def->iothreadids[i]->thread_id,
- pininfo->cpumask) < 0)
+ def->iothreadids[i]->cpumask) < 0)
goto cleanup;
}
ret = 0;
--
2.1.0
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