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[libvirt] [PATCH v5 4/4] cputune_event: queue the event for cputune updates



Now we have universal tunable event so we can use it for reporting
changes to user. The cputune values will be prefixed with "cputune" to
distinguish it from other tunable events.

Signed-off-by: Pavel Hrdina <phrdina redhat com>
---

since v4:
- added macro definitions for cputune typedParameters fileds

 include/libvirt/libvirt.h.in | 63 ++++++++++++++++++++++++++++++++++
 src/qemu/qemu_cgroup.c       | 19 ++++++++++-
 src/qemu/qemu_driver.c       | 81 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 162 insertions(+), 1 deletion(-)

diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index 86be86f..898f8b5 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -5204,6 +5204,66 @@ typedef void (*virConnectDomainEventDeviceRemovedCallback)(virConnectPtr conn,
                                                            void *opaque);
 
 /**
+ * VIR_DOMAIN_EVENT_CPUTUNE_VCPUPIN:
+ *
+ * Macro represents formatted pinning for one vcpu specified by id which is
+ * appended to the parameter name, for example "cputune.vcpupin1",
+ * as VIR_TYPED_PARAM_STRING.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_VCPUPIN "cputune.vcpupin%u"
+
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_EMULATORIN:
+ *
+ * Macro represents formatted pinning for emulator process,
+ * as VIR_TYPED_PARAM_STRING.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_EMULATORIN "cputune.emulatorpin"
+
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_CPU_SHARES:
+ *
+ * Macro represents proportional weight of the scheduler used on the
+ * host cpu, when using the posix scheduler, as VIR_TYPED_PARAM_ULLONG.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_CPU_SHARES "cputune.cpu_shares"
+
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_VCPU_PERIOD:
+ *
+ * Macro represents the enforcement period for a quota, in microseconds,
+ * for vcpus only, when using the posix scheduler, as VIR_TYPED_PARAM_ULLONG.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_VCPU_PERIOD "cputune.vcpu_period"
+
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_VCPU_QUOTA:
+ *
+ * Macro represents the maximum bandwidth to be used within a period for
+ * vcpus only, when using the posix scheduler, as VIR_TYPED_PARAM_LLONG.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_VCPU_QUOTA "cputune.vcpu_quota"
+
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_EMULATOR_PERIOD:
+ *
+ * Macro represents the enforcement period for a quota in microseconds,
+ * when using the posix scheduler, for all emulator activity not tied to
+ * vcpus, as VIR_TYPED_PARAM_ULLONG.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_EMULATOR_PERIOD "cputune.emulator_period"
+
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_EMULATOR_QUOTA:
+ *
+ * Macro represents the maximum bandwidth to be used within a period for
+ * all emulator activity not tied to vcpus, when using the posix scheduler,
+ * as an VIR_TYPED_PARAM_LLONG.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_EMULATOR_QUOTA "cputune.emulator_quota"
+
+
+/**
  * virConnectDomainEventTunableCallback:
  * @conn: connection object
  * @dom: domain on which the event occurred
@@ -5215,6 +5275,9 @@ typedef void (*virConnectDomainEventDeviceRemovedCallback)(virConnectPtr conn,
  * be freed in the callback handler as it's done internally after the callback
  * handler is executed.
  *
+ * Currently supported name spaces:
+ *  "cputune.*"
+ *
  * The callback signature to use when registering for an event of type
  * VIR_DOMAIN_EVENT_ID_TUNABLE with virConnectDomainEventRegisterAny()
  */
diff --git a/src/qemu/qemu_cgroup.c b/src/qemu/qemu_cgroup.c
index 7c6b2c1..41d7057 100644
--- a/src/qemu/qemu_cgroup.c
+++ b/src/qemu/qemu_cgroup.c
@@ -34,6 +34,7 @@
 #include "virscsi.h"
 #include "virstring.h"
 #include "virfile.h"
+#include "virtypedparam.h"
 
 #define VIR_FROM_THIS VIR_FROM_QEMU
 
@@ -676,6 +677,10 @@ static int
 qemuSetupCpuCgroup(virDomainObjPtr vm)
 {
     qemuDomainObjPrivatePtr priv = vm->privateData;
+    virObjectEventPtr event = NULL;
+    virTypedParameterPtr eventParams = 0;
+    int eventNparams = 0;
+    int eventMaxparams = 0;
 
     if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
        if (vm->def->cputune.sharesSpecified) {
@@ -694,7 +699,19 @@ qemuSetupCpuCgroup(virDomainObjPtr vm)
 
         if (virCgroupGetCpuShares(priv->cgroup, &val) < 0)
             return -1;
-        vm->def->cputune.shares = val;
+        if (vm->def->cputune.shares != val) {
+            vm->def->cputune.shares = val;
+            if (virTypedParamsAddULLong(&eventParams, &eventNparams,
+                                        &eventMaxparams,
+                                        VIR_DOMAIN_EVENT_CPUTUNE_CPU_SHARES,
+                                        val) < 0)
+                return -1;
+
+            event = virDomainEventTunableNewFromObj(vm, eventParams, eventNparams);
+        }
+
+        if (event)
+            qemuDomainEventQueue(vm->privateData, event);
     }
 
     return 0;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index e73d4f9..d1a0657 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -4538,6 +4538,12 @@ qemuDomainPinVcpuFlags(virDomainPtr dom,
     virBitmapPtr pcpumap = NULL;
     virQEMUDriverConfigPtr cfg = NULL;
     virCapsPtr caps = NULL;
+    virObjectEventPtr event = NULL;
+    char paramField[VIR_TYPED_PARAM_FIELD_LENGTH] = "";
+    char *str = NULL;
+    virTypedParameterPtr eventParams = NULL;
+    int eventNparams = 0;
+    int eventMaxparams = 0;
 
     virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
                   VIR_DOMAIN_AFFECT_CONFIG, -1);
@@ -4645,6 +4651,18 @@ qemuDomainPinVcpuFlags(virDomainPtr dom,
 
         if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
             goto cleanup;
+
+        if (snprintf(paramField, VIR_TYPED_PARAM_FIELD_LENGTH,
+                     VIR_DOMAIN_EVENT_CPUTUNE_VCPUPIN, vcpu) < 0) {
+            goto cleanup;
+        }
+
+        str = virBitmapFormat(pcpumap);
+        if (virTypedParamsAddString(&eventParams, &eventNparams,
+                                    &eventMaxparams, paramField, str) < 0)
+            goto cleanup;
+
+        event = virDomainEventTunableNewFromDom(dom, eventParams, eventNparams);
     }
 
     if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
@@ -4680,6 +4698,9 @@ qemuDomainPinVcpuFlags(virDomainPtr dom,
         virCgroupFree(&cgroup_vcpu);
     if (vm)
         virObjectUnlock(vm);
+    if (event)
+        qemuDomainEventQueue(driver, event);
+    VIR_FREE(str);
     virBitmapFree(pcpumap);
     virObjectUnref(caps);
     virObjectUnref(cfg);
@@ -4804,6 +4825,12 @@ qemuDomainPinEmulator(virDomainPtr dom,
     virBitmapPtr pcpumap = NULL;
     virQEMUDriverConfigPtr cfg = NULL;
     virCapsPtr caps = NULL;
+    virObjectEventPtr event = NULL;
+    char * str = NULL;
+    virTypedParameterPtr eventParams = NULL;
+    int eventNparams = 0;
+    int eventMaxparams = 0;
+
 
     virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
                   VIR_DOMAIN_AFFECT_CONFIG, -1);
@@ -4909,6 +4936,15 @@ qemuDomainPinEmulator(virDomainPtr dom,
 
         if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
             goto cleanup;
+
+        str = virBitmapFormat(pcpumap);
+        if (virTypedParamsAddString(&eventParams, &eventNparams,
+                                    &eventMaxparams,
+                                    VIR_DOMAIN_EVENT_CPUTUNE_EMULATORIN,
+                                    str) < 0)
+            goto cleanup;
+
+        event = virDomainEventTunableNewFromDom(dom, eventParams, eventNparams);
     }
 
     if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
@@ -4938,6 +4974,9 @@ qemuDomainPinEmulator(virDomainPtr dom,
  cleanup:
     if (cgroup_emulator)
         virCgroupFree(&cgroup_emulator);
+    if (event)
+        qemuDomainEventQueue(driver, event);
+    VIR_FREE(str);
     virBitmapFree(pcpumap);
     virObjectUnref(caps);
     if (vm)
@@ -9202,6 +9241,10 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
     virQEMUDriverConfigPtr cfg = NULL;
     virCapsPtr caps = NULL;
     qemuDomainObjPrivatePtr priv;
+    virObjectEventPtr event = NULL;
+    virTypedParameterPtr eventParams = NULL;
+    int eventNparams = 0;
+    int eventMaxNparams = 0;
 
     virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
                   VIR_DOMAIN_AFFECT_CONFIG, -1);
@@ -9272,6 +9315,12 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
 
                 vm->def->cputune.shares = val;
                 vm->def->cputune.sharesSpecified = true;
+
+                if (virTypedParamsAddULLong(&eventParams, &eventNparams,
+                                            &eventMaxNparams,
+                                            VIR_DOMAIN_EVENT_CPUTUNE_CPU_SHARES,
+                                            val) < 0)
+                    goto cleanup;
             }
 
             if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
@@ -9289,6 +9338,12 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
                     goto cleanup;
 
                 vm->def->cputune.period = value_ul;
+
+                if (virTypedParamsAddULLong(&eventParams, &eventNparams,
+                                            &eventMaxNparams,
+                                            VIR_DOMAIN_EVENT_CPUTUNE_VCPU_PERIOD,
+                                            value_ul) < 0)
+                    goto cleanup;
             }
 
             if (flags & VIR_DOMAIN_AFFECT_CONFIG)
@@ -9303,6 +9358,12 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
                     goto cleanup;
 
                 vm->def->cputune.quota = value_l;
+
+                if (virTypedParamsAddLLong(&eventParams, &eventNparams,
+                                           &eventMaxNparams,
+                                           VIR_DOMAIN_EVENT_CPUTUNE_VCPU_QUOTA,
+                                           value_l) < 0)
+                    goto cleanup;
             }
 
             if (flags & VIR_DOMAIN_AFFECT_CONFIG)
@@ -9318,6 +9379,12 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
                     goto cleanup;
 
                 vm->def->cputune.emulator_period = value_ul;
+
+                if (virTypedParamsAddULLong(&eventParams, &eventNparams,
+                                            &eventMaxNparams,
+                                            VIR_DOMAIN_EVENT_CPUTUNE_EMULATOR_PERIOD,
+                                            value_ul) < 0)
+                    goto cleanup;
             }
 
             if (flags & VIR_DOMAIN_AFFECT_CONFIG)
@@ -9333,6 +9400,12 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
                     goto cleanup;
 
                 vm->def->cputune.emulator_quota = value_l;
+
+                if (virTypedParamsAddLLong(&eventParams, &eventNparams,
+                                           &eventMaxNparams,
+                                           VIR_DOMAIN_EVENT_CPUTUNE_EMULATOR_QUOTA,
+                                           value_l) < 0)
+                    goto cleanup;
             }
 
             if (flags & VIR_DOMAIN_AFFECT_CONFIG)
@@ -9343,6 +9416,12 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
     if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
         goto cleanup;
 
+    if (eventNparams) {
+        event = virDomainEventTunableNewFromDom(dom, eventParams, eventNparams);
+        eventNparams = 0;
+        if (event)
+            qemuDomainEventQueue(driver, event);
+    }
 
     if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
         rc = virDomainSaveConfig(cfg->configDir, vmdef);
@@ -9359,6 +9438,8 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
     virDomainDefFree(vmdef);
     if (vm)
         virObjectUnlock(vm);
+    if (eventNparams)
+        virTypedParamsFree(eventParams, eventNparams);
     virObjectUnref(caps);
     virObjectUnref(cfg);
     return ret;
-- 
1.8.5.5


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