dsg/cloud-hypervisor
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vmm: logger: improve output of timestamp

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Streamline the output format of the timestamp of a message.
The old format doesn't nicely align across multiple lines.

# Example (old style)
```
cloud-hypervisor: 858.465660ms: <vcpu0> DEBUG:devices/src/ioapic.rs:154 -- IOAPIC_R @ offset 0x10
cloud-hypervisor: 858.507342ms: <vcpu0> DEBUG:devices/src/ioapic.rs:298 -- IOAPIC_R reg 0x1
cloud-hypervisor: 1.010001s: <vcpu0> DEBUG:devices/src/ioapic.rs:174 -- IOAPIC_W @ offset 0x0
cloud-hypervisor: 1.010067s: <vcpu0> DEBUG:devices/src/ioapic.rs:154 -- IOAPIC_R @ offset 0x10
```

# Example (new style)
```
cloud-hypervisor:   0.731399s: <vcpu0> DEBUG:devices/src/ioapic.rs:174 -- IOAPIC_W @ offset 0x10
cloud-hypervisor:   0.731420s: <vcpu0> DEBUG:devices/src/ioapic.rs:252 -- IOAPIC_W reg 0x2a, val 0x10000
cloud-hypervisor:  17.026073s: <vmm> INFO:vmm/src/api/mod.rs:898 -- API request event: VmInfo
cloud-hypervisor:  17.263210s: <vmm> INFO:vmm/src/api/mod.rs:898 -- API request event: VmInfo
cloud-hypervisor:  17.547915s: <vmm> INFO:vmm/src/api/mod.rs:898 -- API request event: VmInfo
```

Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
On-behalf-of: SAP philipp.schuster@sap.com
This commit is contained in:
Philipp Schuster 2025-08-26 16:23:24 +02:00 • committed by Rob Bradford
parent e5c9f7d615
commit 7a5781e5a2
1 changed files with 7 additions and 4 deletions
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11
src/main.rs
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@ -133,12 +133,14 @@ impl log::Log for Logger {
let now = std::time::Instant::now();
let duration = now.duration_since(self.start);
let duration_s = duration.as_secs_f32();
if record.file().is_some() && record.line().is_some() {
write!(
*(*(self.output.lock().unwrap())),
"cloud-hypervisor: {:.6?}: <{}> {}:{}:{} -- {}\r\n",
duration,
// 10: 6 decimal places + sep => whole seconds in range `0..=999` properly aligned
"cloud-hypervisor: {:>10.6?}s: <{}> {}:{}:{} -- {}\r\n",
duration_s,
std::thread::current().name().unwrap_or("anonymous"),
record.level(),
record.file().unwrap(),
@ -148,8 +150,9 @@ impl log::Log for Logger {
} else {
write!(
*(*(self.output.lock().unwrap())),
"cloud-hypervisor: {:.6?}: <{}> {}:{} -- {}\r\n",
duration,
// 10: 6 decimal places + sep => whole seconds in range `0..=999` properly aligned
"cloud-hypervisor: {:>10.6?}s: <{}> {}:{} -- {}\r\n",
duration_s,
std::thread::current().name().unwrap_or("anonymous"),
record.level(),
record.target(),