[libvirt] [PATCH v2 04/16] conf, schema: add 'id' field for cells
Martin Kletzander
mkletzan at redhat.com
Tue Jul 8 11:50:19 UTC 2014
In XML format, by definition, order of fields should not matter, so
order of parsing the elements doesn't affect the end result. When
specifying guest NUMA cells, we depend only on the order of the 'cell'
elements. With this patch all older domain XMLs are parsed as before,
but with the 'id' attribute they are parsed and formatted according to
that field. This will be useful when we have tuning settings for
particular guest NUMA node.
Signed-off-by: Martin Kletzander <mkletzan at redhat.com>
---
docs/formatdomain.html.in | 11 +++---
docs/schemas/domaincommon.rng | 5 +++
src/conf/cpu_conf.c | 39 +++++++++++++++++++---
src/conf/cpu_conf.h | 3 +-
src/qemu/qemu_command.c | 2 +-
tests/qemuxml2argvdata/qemuxml2argv-cpu-numa1.xml | 6 ++--
tests/qemuxml2argvdata/qemuxml2argv-cpu-numa2.xml | 6 ++--
tests/qemuxml2argvdata/qemuxml2argv-cpu-numa3.xml | 25 ++++++++++++++
tests/qemuxml2argvtest.c | 1 +
.../qemuxml2xmlout-cpu-numa1.xml | 28 ++++++++++++++++
.../qemuxml2xmlout-cpu-numa2.xml | 28 ++++++++++++++++
tests/qemuxml2xmltest.c | 3 ++
12 files changed, 139 insertions(+), 18 deletions(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-cpu-numa3.xml
create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-cpu-numa1.xml
create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-cpu-numa2.xml
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index b69da4c..ad87b7c 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -1030,8 +1030,8 @@
<cpu>
...
<numa>
- <cell cpus='0-3' memory='512000'/>
- <cell cpus='4-7' memory='512000'/>
+ <cell id='0' cpus='0-3' memory='512000'/>
+ <cell id='1' cpus='4-7' memory='512000'/>
</numa>
...
</cpu>
@@ -1041,8 +1041,11 @@
Each <code>cell</code> element specifies a NUMA cell or a NUMA node.
<code>cpus</code> specifies the CPU or range of CPUs that are part of
the node. <code>memory</code> specifies the node memory in kibibytes
- (i.e. blocks of 1024 bytes). Each cell or node is assigned cellid
- or nodeid in the increasing order starting from 0.
+ (i.e. blocks of 1024 bytes). All cells should have <code>id</code>
+ attribute in case referring to some cell is necessary in the code,
+ otherwise the cells are assigned ids in the increasing order starting
+ from 0. Mixing cells with and without the <code>id</code> attribute
+ is not recommended as it may result in unwanted behaviour.
</p>
<p>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 7be028d..155a33e 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -3902,6 +3902,11 @@
<define name="numaCell">
<element name="cell">
+ <optional>
+ <attribute name="id">
+ <ref name="unsignedInt"/>
+ </attribute>
+ </optional>
<attribute name="cpus">
<ref name="cpuset"/>
</attribute>
diff --git a/src/conf/cpu_conf.c b/src/conf/cpu_conf.c
index 811893d..9e0af08 100644
--- a/src/conf/cpu_conf.c
+++ b/src/conf/cpu_conf.c
@@ -152,7 +152,6 @@ virCPUDefCopy(const virCPUDef *cpu)
copy->ncells_max = copy->ncells = cpu->ncells;
for (i = 0; i < cpu->ncells; i++) {
- copy->cells[i].cellid = cpu->cells[i].cellid;
copy->cells[i].mem = cpu->cells[i].mem;
copy->cells[i].cpumask = virBitmapNewCopy(cpu->cells[i].cpumask);
@@ -438,17 +437,46 @@ virCPUDefParseXML(xmlNodePtr node,
for (i = 0; i < n; i++) {
char *cpus, *memory;
int ret, ncpus = 0;
+ unsigned int cur_cell;
+ char *tmp = NULL;
+
+ tmp = virXMLPropString(nodes[i], "id");
+ if (!tmp) {
+ cur_cell = i;
+ } else {
+ ret = virStrToLong_ui(tmp, NULL, 10, &cur_cell);
+ VIR_FREE(tmp);
+ if (ret == -1) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("Invalid 'id' attribute in NUMA cell"));
+ goto error;
+ }
+ }
+
+ if (cur_cell >= n) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("Exactly one 'cell' element per guest "
+ "NUMA cell allowed, non-contiguous ranges or "
+ "ranges not starting from 0 are not allowed"));
+ goto error;
+ }
+
+ if (def->cells[cur_cell].cpustr) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("Duplicate NUMA cell info for cell id '%u'"),
+ cur_cell);
+ goto error;
+ }
- def->cells[i].cellid = i;
cpus = virXMLPropString(nodes[i], "cpus");
if (!cpus) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("Missing 'cpus' attribute in NUMA cell"));
goto error;
}
- def->cells[i].cpustr = cpus;
+ def->cells[cur_cell].cpustr = cpus;
- ncpus = virBitmapParse(cpus, 0, &def->cells[i].cpumask,
+ ncpus = virBitmapParse(cpus, 0, &def->cells[cur_cell].cpumask,
VIR_DOMAIN_CPUMASK_LEN);
if (ncpus <= 0)
goto error;
@@ -461,7 +489,7 @@ virCPUDefParseXML(xmlNodePtr node,
goto error;
}
- ret = virStrToLong_ui(memory, NULL, 10, &def->cells[i].mem);
+ ret = virStrToLong_ui(memory, NULL, 10, &def->cells[cur_cell].mem);
if (ret == -1) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("Invalid 'memory' attribute in NUMA cell"));
@@ -645,6 +673,7 @@ virCPUDefFormatBuf(virBufferPtr buf,
virBufferAdjustIndent(buf, 2);
for (i = 0; i < def->ncells; i++) {
virBufferAddLit(buf, "<cell");
+ virBufferAsprintf(buf, " id='%zu'", i);
virBufferAsprintf(buf, " cpus='%s'", def->cells[i].cpustr);
virBufferAsprintf(buf, " memory='%d'", def->cells[i].mem);
virBufferAddLit(buf, "/>\n");
diff --git a/src/conf/cpu_conf.h b/src/conf/cpu_conf.h
index 8c932ce..2d538db 100644
--- a/src/conf/cpu_conf.h
+++ b/src/conf/cpu_conf.h
@@ -1,7 +1,7 @@
/*
* cpu_conf.h: CPU XML handling
*
- * Copyright (C) 2009-2011, 2013 Red Hat, Inc.
+ * Copyright (C) 2009-2011, 2013, 2014 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@@ -93,7 +93,6 @@ struct _virCPUFeatureDef {
typedef struct _virCellDef virCellDef;
typedef virCellDef *virCellDefPtr;
struct _virCellDef {
- int cellid;
virBitmapPtr cpumask; /* CPUs that are part of this node */
char *cpustr; /* CPUs stored in string form for dumpxml */
unsigned int mem; /* Node memory in kB */
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 0ead1d0..249ce8d 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6390,7 +6390,7 @@ qemuBuildNumaArgStr(const virDomainDef *def, virCommandPtr cmd)
}
virCommandAddArg(cmd, "-numa");
- virBufferAsprintf(&buf, "node,nodeid=%d", def->cpu->cells[i].cellid);
+ virBufferAsprintf(&buf, "node,nodeid=%zu", i);
virBufferAddLit(&buf, ",cpus=");
/* Up through qemu 1.4, -numa does not accept a cpus
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa1.xml b/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa1.xml
index ee402c8..0543f7f 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa1.xml
+++ b/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa1.xml
@@ -9,10 +9,10 @@
<boot dev='network'/>
</os>
<cpu>
- <topology sockets="2" cores="4" threads="2"/>
+ <topology sockets='2' cores='4' threads='2'/>
<numa>
- <cell cpus="0-7" memory="109550"/>
- <cell cpus="8-15" memory="109550"/>
+ <cell cpus='0-7' memory='109550'/>
+ <cell cpus='8-15' memory='109550'/>
</numa>
</cpu>
<clock offset='utc'/>
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa2.xml b/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa2.xml
index ee402c8..0a5f9fc 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa2.xml
+++ b/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa2.xml
@@ -9,10 +9,10 @@
<boot dev='network'/>
</os>
<cpu>
- <topology sockets="2" cores="4" threads="2"/>
+ <topology sockets='2' cores='4' threads='2'/>
<numa>
- <cell cpus="0-7" memory="109550"/>
- <cell cpus="8-15" memory="109550"/>
+ <cell id='1' cpus='8-15' memory='109550'/>
+ <cell id='0' cpus='0-7' memory='109550'/>
</numa>
</cpu>
<clock offset='utc'/>
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa3.xml b/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa3.xml
new file mode 100644
index 0000000..fa3070d
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa3.xml
@@ -0,0 +1,25 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219100</memory>
+ <currentMemory unit='KiB'>219100</currentMemory>
+ <vcpu placement='static'>16</vcpu>
+ <os>
+ <type arch='x86_64' machine='pc'>hvm</type>
+ <boot dev='network'/>
+ </os>
+ <cpu>
+ <topology sockets='2' cores='4' threads='2'/>
+ <numa>
+ <cell id='1' cpus='0-7' memory='109550'/>
+ <cell id='2' cpus='8-15' memory='109550'/>
+ </numa>
+ </cpu>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu</emulator>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index bbc0fb7..b0c9596 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1177,6 +1177,7 @@ mymain(void)
DO_TEST("cpu-strict1", NONE);
DO_TEST("cpu-numa1", NONE);
DO_TEST("cpu-numa2", QEMU_CAPS_SMP_TOPOLOGY);
+ DO_TEST_PARSE_ERROR("cpu-numa3", NONE);
DO_TEST("cpu-host-model", NONE);
skipLegacyCPUs = true;
DO_TEST("cpu-host-model-fallback", NONE);
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-cpu-numa1.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-cpu-numa1.xml
new file mode 100644
index 0000000..227bf1c
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-cpu-numa1.xml
@@ -0,0 +1,28 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219100</memory>
+ <currentMemory unit='KiB'>219100</currentMemory>
+ <vcpu placement='static'>16</vcpu>
+ <os>
+ <type arch='x86_64' machine='pc'>hvm</type>
+ <boot dev='network'/>
+ </os>
+ <cpu>
+ <topology sockets='2' cores='4' threads='2'/>
+ <numa>
+ <cell id='0' cpus='0-7' memory='109550'/>
+ <cell id='1' cpus='8-15' memory='109550'/>
+ </numa>
+ </cpu>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu</emulator>
+ <controller type='usb' index='0'/>
+ <controller type='pci' index='0' model='pci-root'/>
+ <memballoon model='virtio'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-cpu-numa2.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-cpu-numa2.xml
new file mode 100644
index 0000000..227bf1c
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-cpu-numa2.xml
@@ -0,0 +1,28 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219100</memory>
+ <currentMemory unit='KiB'>219100</currentMemory>
+ <vcpu placement='static'>16</vcpu>
+ <os>
+ <type arch='x86_64' machine='pc'>hvm</type>
+ <boot dev='network'/>
+ </os>
+ <cpu>
+ <topology sockets='2' cores='4' threads='2'/>
+ <numa>
+ <cell id='0' cpus='0-7' memory='109550'/>
+ <cell id='1' cpus='8-15' memory='109550'/>
+ </numa>
+ </cpu>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu</emulator>
+ <controller type='usb' index='0'/>
+ <controller type='pci' index='0' model='pci-root'/>
+ <memballoon model='virtio'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 26e3cad..9917e69 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -368,6 +368,9 @@ mymain(void)
DO_TEST("chardev-label");
+ DO_TEST_DIFFERENT("cpu-numa1");
+ DO_TEST_DIFFERENT("cpu-numa2");
+
virObjectUnref(driver.caps);
virObjectUnref(driver.xmlopt);
--
2.0.0
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