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vmm: Add some tracing of boot sequence

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Add tracing of the VM boot sequence from the point at which the request
to create a VM is received to the hand-off to the vCPU threads running.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford
2022-09-16 16:56:36 +01:00
parent b35e6f3018
commit 1202b9a07a
6 changed files with 73 additions and 39 deletions
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vmm/src/lib.rs
+46 -39
View File
@@ -46,6 +46,7 @@ use std::sync::mpsc::{Receiver, RecvError, SendError, Sender};
use std::sync::{Arc, Mutex};
use std::{result, thread};
use thiserror::Error;
use tracer::trace_scoped;
use vm_memory::bitmap::AtomicBitmap;
use vm_migration::{protocol::*, Migratable};
use vm_migration::{MigratableError, Pausable, Snapshot, Snapshottable, Transportable};
@@ -524,50 +525,56 @@ impl Vmm {
}
fn vm_boot(&mut self) -> result::Result<(), VmError> {
// If we don't have a config, we can not boot a VM.
if self.vm_config.is_none() {
return Err(VmError::VmMissingConfig);
};
tracer::start();
let r = {
trace_scoped!("vm_boot");
// If we don't have a config, we can not boot a VM.
if self.vm_config.is_none() {
return Err(VmError::VmMissingConfig);
};
// Create a new VM if we don't have one yet.
if self.vm.is_none() {
let exit_evt = self.exit_evt.try_clone().map_err(VmError::EventFdClone)?;
let reset_evt = self.reset_evt.try_clone().map_err(VmError::EventFdClone)?;
#[cfg(feature = "gdb")]
let vm_debug_evt = self
.vm_debug_evt
.try_clone()
.map_err(VmError::EventFdClone)?;
let activate_evt = self
.activate_evt
.try_clone()
.map_err(VmError::EventFdClone)?;
// Create a new VM if we don't have one yet.
if self.vm.is_none() {
let exit_evt = self.exit_evt.try_clone().map_err(VmError::EventFdClone)?;
let reset_evt = self.reset_evt.try_clone().map_err(VmError::EventFdClone)?;
#[cfg(feature = "gdb")]
let vm_debug_evt = self
.vm_debug_evt
.try_clone()
.map_err(VmError::EventFdClone)?;
let activate_evt = self
.activate_evt
.try_clone()
.map_err(VmError::EventFdClone)?;
if let Some(ref vm_config) = self.vm_config {
let vm = Vm::new(
Arc::clone(vm_config),
exit_evt,
reset_evt,
#[cfg(feature = "gdb")]
vm_debug_evt,
&self.seccomp_action,
self.hypervisor.clone(),
activate_evt,
None,
None,
None,
)?;
if let Some(ref vm_config) = self.vm_config {
let vm = Vm::new(
Arc::clone(vm_config),
exit_evt,
reset_evt,
#[cfg(feature = "gdb")]
vm_debug_evt,
&self.seccomp_action,
self.hypervisor.clone(),
activate_evt,
None,
None,
None,
)?;
self.vm = Some(vm);
self.vm = Some(vm);
}
}
}
// Now we can boot the VM.
if let Some(ref mut vm) = self.vm {
vm.boot()
} else {
Err(VmError::VmNotCreated)
}
// Now we can boot the VM.
if let Some(ref mut vm) = self.vm {
vm.boot()
} else {
Err(VmError::VmNotCreated)
}
};
tracer::end();
r
}
fn vm_pause(&mut self) -> result::Result<(), VmError> {