david.venhoff/qemu-nyx-runner
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Track total time using tsc packets and total internal time with cycles.

Browse Source 
Something is still wrong though, the tsc time is somehow less than the cyc time
This commit is contained in:
David Venhoff 2025-09-04 16:31:17 +02:00
parent 2e5af76dbb
commit 10ca8f89f6
1 changed files with 17 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
pt-dump-decoder/src/lib.rs
View File

@ -10,14 +10,13 @@ use std::time::Duration;
pub struct AnalyzeData {
pub packets: u64,
pub cycles: u64,
pub time: Duration,
pub time_tsc: Duration,
pub time_cyc: Duration,
pub time_main: Duration,
pub time_disabled: Duration,
}
#[derive(Debug, Eq, PartialEq)]
enum Scope {
Disabled,
Main,
PreRun,
PostRun,
@ -38,17 +37,20 @@ pub fn analyze_dump(path: impl AsRef<Path>) -> Result<AnalyzeData, Box<dyn Error
let mut segments = vec![(Scope::PreRun, 0u64)];
let mut total = 0u64;
let mut first_tsc = None::<u64>;
let mut last_tsc = 0;
for packet in decoder {
total += 1;
match packet {
Ok(Packet::Cyc(cyc)) => {
segments.last_mut().unwrap().1 += cyc.value();
}
Ok(Packet::TipPge(_)) => {
segments.push((Scope::Main, 0));
Ok(Packet::Tsc(tsc)) => {
if first_tsc.is_none() {
first_tsc = Some(tsc.tsc());
}
Ok(Packet::TipPgd(_)) => {
segments.push((Scope::Disabled, 0));
last_tsc = tsc.tsc();
}
Ok(Packet::Ptw(ptwrite)) => {
if ptwrite.payload() == 42 {
@ -61,6 +63,9 @@ pub fn analyze_dump(path: impl AsRef<Path>) -> Result<AnalyzeData, Box<dyn Error
println!("GOT PTWRITE!!!!!: {ptwrite:?}");
}
}
Ok(Packet::Ovf(overflow)) => {
panic!("Got overflow packet: {overflow:?}, index {total}");
}
Ok(_) => {}
Err(error) => println!("Got error: {error:?}"),
}
@ -69,15 +74,16 @@ pub fn analyze_dump(path: impl AsRef<Path>) -> Result<AnalyzeData, Box<dyn Error
let cycles_total = segments.iter().map(|(_, cycles)| cycles).sum();
let total_seconds = cycles_total as f64 / 2_700_000_000.0;
let total_seconds_tsc = (last_tsc - first_tsc.unwrap()) as f64 / 2_700_000_000.0;
let main_duration = duration_in_mode(&segments, Scope::Main);
let disabled_duration = duration_in_mode(&segments, Scope::Disabled);
Ok(AnalyzeData {
packets: total,
cycles: cycles_total,
time: Duration::from_secs_f64(total_seconds),
time_cyc: Duration::from_secs_f64(total_seconds),
time_main: main_duration,
time_disabled: disabled_duration
time_tsc: Duration::from_secs_f64(total_seconds_tsc)
})
}