[libvirt] [PATCH 4/8] domain: introduce xml elements for throttle blkio cgroup
Gao feng
gaofeng at cn.fujitsu.com
Wed Dec 11 08:29:49 UTC 2013
This patch introduces new xml elements under <blkiotune>,
we use these new elements to setup the throttle blkio
cgroup for domain. The new blkiotune node looks like this:
<blkiotune>
<device>
<path>/path/to/block</path>
<weight>1000</weight>
<read_iops_sec>10000</read_iops_sec>
<write_iops_sec>10000</write_iops_sec>
<read_bytes_sec>1000000</read_bytes_sec>
<write_bytes_sec>1000000</write_bytes_sec>
</device>
</blkiotune>
Signed-off-by: Guan Qiang <hzguanqiang at corp.netease.com>
Signed-off-by: Gao feng <gaofeng at cn.fujitsu.com>
---
docs/schemas/domaincommon.rng | 28 ++++++++++++--
src/conf/domain_conf.c | 85 +++++++++++++++++++++++++++++++++++++------
src/conf/domain_conf.h | 4 ++
3 files changed, 103 insertions(+), 14 deletions(-)
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 38c6801..bc8ed5d 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -621,9 +621,31 @@
<element name="path">
<ref name="absFilePath"/>
</element>
- <element name="weight">
- <ref name="weight"/>
- </element>
+ <optional>
+ <element name="weight">
+ <ref name="weight"/>
+ </element>
+ </optional>
+ <optional>
+ <element name="read_iops_sec">
+ <data type='unsignedInt'/>
+ </element>
+ </optional>
+ <optional>
+ <element name="write_iops_sec">
+ <data type='unsignedInt'/>
+ </element>
+ </optional>
+ <optional>
+ <element name="read_bytes_sec">
+ <data type='unsignedLong'/>
+ </element>
+ </optional>
+ <optional>
+ <element name="write_bytes_sec">
+ <data type='unsignedLong'/>
+ </element>
+ </optional>
</interleave>
</element>
</zeroOrMore>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 26242b6..c4d51b4 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -899,15 +899,19 @@ virBlkioDeviceArrayClear(virBlkioDevicePtr devices,
* <device>
* <path>/fully/qualified/device/path</path>
* <weight>weight</weight>
+ * <read_bytes_sec>bps</read_bytes_sec>
+ * <write_bytes_sec>bps</write_bytes_sec>
+ * <read_iops_sec>iops</read_iops_sec>
+ * <write_iops_sec>iops</write_iops_sec>
* </device>
*
- * and fills a virBlkioDeviceTune struct.
+ * and fills a virBlkioDevicePtr struct.
*/
static int
virDomainBlkioDeviceParseXML(xmlNodePtr root,
virBlkioDevicePtr dev)
{
- char *c;
+ char *c = NULL;
xmlNodePtr node;
node = root->children;
@@ -921,9 +925,43 @@ virDomainBlkioDeviceParseXML(xmlNodePtr root,
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("could not parse weight %s"),
c);
- VIR_FREE(c);
- VIR_FREE(dev->path);
- return -1;
+ goto error;
+ }
+ VIR_FREE(c);
+ } else if (xmlStrEqual(node->name, BAD_CAST "read_bytes_sec")) {
+ c = (char *)xmlNodeGetContent(node);
+ if (virStrToLong_ull(c, NULL, 10, &dev->rbps) < 0) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("could not parse read bytes sec %s"),
+ c);
+ goto error;
+ }
+ VIR_FREE(c);
+ } else if (xmlStrEqual(node->name, BAD_CAST "write_bytes_sec")) {
+ c = (char *)xmlNodeGetContent(node);
+ if (virStrToLong_ull(c, NULL, 10, &dev->wbps) < 0) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("could not parse write bytes sec %s"),
+ c);
+ goto error;
+ }
+ VIR_FREE(c);
+ } else if (xmlStrEqual(node->name, BAD_CAST "read_iops_sec")) {
+ c = (char *)xmlNodeGetContent(node);
+ if (virStrToLong_ui(c, NULL, 10, &dev->riops) < 0) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("could not parse read iops sec %s"),
+ c);
+ goto error;
+ }
+ VIR_FREE(c);
+ } else if (xmlStrEqual(node->name, BAD_CAST "write_iops_sec")) {
+ c = (char *)xmlNodeGetContent(node);
+ if (virStrToLong_ui(c, NULL, 10, &dev->wiops) < 0) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("could not parse write iops sec %s"),
+ c);
+ goto error;
}
VIR_FREE(c);
}
@@ -937,6 +975,11 @@ virDomainBlkioDeviceParseXML(xmlNodePtr root,
}
return 0;
+
+error:
+ VIR_FREE(c);
+ VIR_FREE(dev->path);
+ return -1;
}
@@ -11105,7 +11148,7 @@ virDomainDefParseXML(xmlDocPtr xml,
if (STREQ(def->blkio.devices[j].path,
def->blkio.devices[i].path)) {
virReportError(VIR_ERR_XML_ERROR,
- _("duplicate device weight path '%s'"),
+ _("duplicate blkio device path '%s'"),
def->blkio.devices[i].path);
goto error;
}
@@ -16614,7 +16657,11 @@ virDomainDefFormatInternal(virDomainDefPtr def,
blkio = true;
} else {
for (n = 0; n < def->blkio.ndevices; n++) {
- if (def->blkio.devices[n].weight) {
+ if (def->blkio.devices[n].weight ||
+ def->blkio.devices[n].riops ||
+ def->blkio.devices[n].wiops ||
+ def->blkio.devices[n].rbps ||
+ def->blkio.devices[n].wbps) {
blkio = true;
break;
}
@@ -16629,13 +16676,29 @@ virDomainDefFormatInternal(virDomainDefPtr def,
def->blkio.weight);
for (n = 0; n < def->blkio.ndevices; n++) {
- if (def->blkio.devices[n].weight == 0)
+ virBlkioDevicePtr dev = &def->blkio.devices[n];
+
+ if (!dev->weight && !dev->riops && !dev->wiops &&
+ !dev->rbps && !dev->wbps)
continue;
virBufferAddLit(buf, " <device>\n");
virBufferEscapeString(buf, " <path>%s</path>\n",
- def->blkio.devices[n].path);
- virBufferAsprintf(buf, " <weight>%u</weight>\n",
- def->blkio.devices[n].weight);
+ dev->path);
+ if (dev->weight)
+ virBufferAsprintf(buf, " <weight>%u</weight>\n",
+ dev->weight);
+ if (dev->riops)
+ virBufferAsprintf(buf, " <read_iops_sec>%u</read_iops_sec>\n",
+ dev->riops);
+ if (dev->wiops)
+ virBufferAsprintf(buf, " <write_iops_sec>%u</write_iops_sec>\n",
+ dev->wiops);
+ if (dev->rbps)
+ virBufferAsprintf(buf, " <read_bytes_sec>%llu</read_bytes_sec>\n",
+ dev->rbps);
+ if (dev->wbps)
+ virBufferAsprintf(buf, " <write_bytes_sec>%llu</write_bytes_sec>\n",
+ dev->wbps);
virBufferAddLit(buf, " </device>\n");
}
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index b410fd0..5631ccd 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1865,6 +1865,10 @@ typedef virBlkioDevice *virBlkioDevicePtr;
struct _virBlkioDevice {
char *path;
unsigned int weight;
+ unsigned int riops;
+ unsigned int wiops;
+ unsigned long long rbps;
+ unsigned long long wbps;
};
enum virDomainRNGModel {
--
1.8.3.1
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