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vmm: cpu: Add info!() level debugging to vCPU handling

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These messages are intended to be useful to support debugging related to
vCPU hotplug/unplug issues.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2020-06-23 13:11:00 +01:00
parent 3c2bfbdc95
commit b107bfcf2c
1 changed files with 20 additions and 0 deletions
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20
vmm/src/cpu.rs
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@ -692,6 +692,8 @@ impl CpuManager {
entry_point: Option<EntryPoint>,
snapshot: Option<Snapshot>,
) -> Result<Arc<Mutex<Vcpu>>> {
info!("Creating vCPU: cpu_id = {}", cpu_id);
let interrupt_controller = if let Some(interrupt_controller) = &self.interrupt_controller {
Some(interrupt_controller.clone())
} else {
@ -749,6 +751,14 @@ impl CpuManager {
}
fn create_vcpus(&mut self, desired_vcpus: u8, entry_point: Option<EntryPoint>) -> Result<()> {
info!(
"Request to create new vCPUs: desired = {}, max = {}, allocated = {}, present = {}",
desired_vcpus,
self.config.max_vcpus,
self.vcpus.len(),
self.present_vcpus()
);
if desired_vcpus > self.config.max_vcpus {
return Err(Error::DesiredVCPUCountExceedsMax);
}
@ -777,6 +787,8 @@ impl CpuManager {
.vcpu_run_interrupted
.clone();
info!("Starting vCPU: cpu_id = {}", cpu_id);
let handle = Some(
thread::Builder::new()
.name(format!("vcpu{}", cpu_id))
@ -856,6 +868,13 @@ impl CpuManager {
(desired_vcpus - self.present_vcpus() + 1) as usize,
));
info!(
"Starting vCPUs: desired = {}, allocated = {}, present = {}",
desired_vcpus,
self.vcpus.len(),
self.present_vcpus()
);
for cpu_id in self.present_vcpus()..desired_vcpus {
let vcpu = Arc::clone(&self.vcpus[cpu_id as usize]);
self.start_vcpu(vcpu, vcpu_thread_barrier.clone(), inserting)?;
@ -875,6 +894,7 @@ impl CpuManager {
}
fn remove_vcpu(&mut self, cpu_id: u8) -> Result<()> {
info!("Removing vCPU: cpu_id = {}", cpu_id);
let mut state = &mut self.vcpu_states[usize::from(cpu_id)];
state.kill.store(true, Ordering::SeqCst);
state.signal_thread();