[PATCH v3 2/2] qemu: Introduce qemuDomainGetStatsCpuHaltPollTime

[Yang Fei <yangfei85@xxxxxxxxxx>]

This function add halt polling time interface in domstats. So that
we can use command 'virsh domstats VM' to get the data if system
support.

Signed-off-by: Yang Fei <yangfei85@xxxxxxxxxx>
---
 src/libvirt-domain.c   |  7 +++++++
 src/qemu/qemu_driver.c | 20 ++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c
index 750e32f0ca..8e58c1b43f 100644
--- a/src/libvirt-domain.c
+++ b/src/libvirt-domain.c
@@ -11625,6 +11625,13 @@ virConnectGetDomainCapabilities(virConnectPtr conn,
  *     "cpu.user" - user cpu time spent in nanoseconds as unsigned long long.
  *     "cpu.system" - system cpu time spent in nanoseconds as unsigned long
  *                    long.
+ *     "haltpollsuccess.time" - halt-polling cpu usage about the VCPU polled
+ *                              until a virtual interrupt was delivered in
+ *                              nanoseconds as unsigned long long.
+ *     "haltpollfail.time" - halt-polling cpu usage about the VCPU had to schedule
+ *                           out (either because the maximum poll time was reached
+ *                           or it needed to yield the CPU) in nanoseconds as
+ *                           unsigned long long.
  *     "cpu.cache.monitor.count" - the number of cache monitors for this domain
  *     "cpu.cache.monitor.<num>.name" - the name of cache monitor <num>
  *     "cpu.cache.monitor.<num>.vcpus" - vcpu list of cache monitor <num>
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 235f575901..adb4628558 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -17839,6 +17839,23 @@ qemuDomainGetStatsCpuCgroup(virDomainObj *dom,
     return 0;
 }
 
+static int
+qemuDomainGetStatsCpuHaltPollTime(virDomainObj *dom,
+                                  virTypedParamList *params)
+{
+    unsigned long long haltPollSuccess = 0;
+    unsigned long long haltPollFail = 0;
+    pid_t pid = dom->pid;
+
+    if (virGetCpuHaltPollTime(pid, &haltPollSuccess, &haltPollFail) < 0)
+        return 0;
+
+    if (virTypedParamListAddULLong(params, haltPollSuccess, "haltpollsuccess.time") < 0 ||
+        virTypedParamListAddULLong(params, haltPollFail, "haltpollfail.time") < 0)
+        return -1;
+
+    return 0;
+}
 
 static int
 qemuDomainGetStatsCpu(virQEMUDriver *driver,
@@ -17852,6 +17869,9 @@ qemuDomainGetStatsCpu(virQEMUDriver *driver,
     if (qemuDomainGetStatsCpuCache(driver, dom, params) < 0)
         return -1;
 
+    if (qemuDomainGetStatsCpuHaltPollTime(dom, params) < 0)
+        return -1;
+
     return 0;
 }
 
-- 
2.23.0