[libvirt] [RFC PATCH v2 1/3] qemu: Expose additional timing metrics for 'setup' and 'mbps'

[mrhines at linux.vnet.ibm.com]

From: "Michael R. Hines" <mrhines at us.ibm.com>

RDMA migration uses the 'setup' state in QEMU to optionally lock
all memory before the migration starts. The total time spent in
this state is already exposed by QEMU, so expose it in libvirt.

Additionally, QEMU also now exports migration throughput (mbps),
so let's see that one too...

Signed-off-by: Michael R. Hines <mrhines at us.ibm.com>
---
 include/libvirt/libvirt.h.in | 15 +++++++++++++++
 src/qemu/qemu_driver.c       | 14 ++++++++++++++
 src/qemu/qemu_monitor.h      | 12 ++++++++++++
 src/qemu/qemu_monitor_json.c |  8 ++++++++
 4 files changed, 49 insertions(+)

diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index 5aad75c..5ac2694 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -4153,6 +4153,21 @@ int virDomainAbortJob(virDomainPtr dom);
 #define VIR_DOMAIN_JOB_DOWNTIME                 "downtime"
 
 /**
+ * VIR_DOMAIN_JOB_MBPS:
+ *
+ * virDomainGetJobStats field: network throughput used while migrating.
+ */
+#define VIR_DOMAIN_JOB_MBPS "mbps"
+
+/**
+ * VIR_DOMAIN_JOB_SETUP_TIME:
+ *
+ * virDomainGetJobStats field: total time in milliseconds spent preparing
+ * the migration in the 'setup' phase before the iterations begin.
+ */
+#define VIR_DOMAIN_JOB_SETUP_TIME "setup_time"
+
+/**
  * VIR_DOMAIN_JOB_DATA_TOTAL:
  *
  * virDomainGetJobStats field: total number of bytes supposed to be
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 47d8a09..6a7dcc7 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -11078,6 +11078,20 @@ qemuDomainGetJobStats(virDomainPtr dom,
             goto cleanup;
     }
 
+    if (priv->job.status.mbps_set) {
+        if (virTypedParamsAddDouble(&par, &npar, &maxpar,
+                                    VIR_DOMAIN_JOB_MBPS,
+                                    priv->job.status.mbps) < 0)
+            goto cleanup;
+    }
+
+    if (priv->job.status.setup_time_set) {
+        if (virTypedParamsAddULLong(&par, &npar, &maxpar,
+                                    VIR_DOMAIN_JOB_SETUP_TIME,
+                                    priv->job.status.setup_time) < 0)
+            goto cleanup;
+    }
+
     if (virTypedParamsAddULLong(&par, &npar, &maxpar,
                                 VIR_DOMAIN_JOB_DISK_TOTAL,
                                 priv->job.info.fileTotal) < 0 ||
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index eabf000..27f9cb4 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -412,6 +412,18 @@ struct _qemuMonitorMigrationStatus {
     /* total or expected depending on status */
     bool downtime_set;
     unsigned long long downtime;
+    /*
+     * Duration of the QEMU 'setup' state.
+     * for RDMA, this may be on the order of several seconds
+     * if pinning support is requested before the migration begins.
+     */
+    bool setup_time_set;
+    unsigned long long setup_time;
+    /*
+     * Migration throughput in Mbps.
+     */
+    bool mbps_set;
+    double mbps;
 
     unsigned long long ram_transferred;
     unsigned long long ram_remaining;
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index ec3b958..214e140 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -2426,6 +2426,14 @@ qemuMonitorJSONGetMigrationStatusReply(virJSONValuePtr reply,
         virJSONValueObjectGetNumberUlong(ram, "normal-bytes",
                                          &status->ram_normal_bytes);
 
+        if (virJSONValueObjectGetNumberDouble(ram, "mbps",
+                                              &status->mbps) == 0)
+            status->mbps_set = true;
+
+        if (virJSONValueObjectGetNumberUlong(ret, "setup-time",
+                                              &status->setup_time) == 0)
+            status->setup_time_set = true;
+
         virJSONValuePtr disk = virJSONValueObjectGet(ret, "disk");
         if (disk) {
             rc = virJSONValueObjectGetNumberUlong(disk, "transferred",
-- 
1.8.1.2