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

Adjust tsc calculation

Browse Source 
Since we only want to record the time when benchmarking
This commit is contained in:
David Venhoff 2025-09-12 11:04:02 +02:00
parent 9ba2bbe8cd
commit 2732383465
1 changed files with 13 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
pt-dump-decoder/src/lib.rs
View File

@ -49,8 +49,10 @@ pub fn analyze_dump(
let f_bus = cpuid!(0x16).ecx as f64 * 1_000_000.0;
let mut current_cbr = 0u8;
let mut first_tsc = None::<u64>;
let mut last_tsc = 0;
// Records the first tsc after the ptwrite (42) message
let mut first_tsc_main = None::<u64>;
// Records the first tsc after the ptwrite (43) message
let mut first_tsc_post_run = None::<u64>;
let mut seen_cbrs = HashMap::<u8, u64>::new();
@ -68,10 +70,15 @@ pub fn analyze_dump(
segments.last_mut().unwrap().1 += duration;
}
Ok(Packet::Tsc(tsc)) => {
if first_tsc.is_none() {
first_tsc = Some(tsc.tsc());
if let [.., (Scope::Main, _)] = segments.as_slice()
&& first_tsc_main.is_none()
{
first_tsc_main = Some(tsc.tsc());
} else if let [.., (Scope::PostRun, _)] = segments.as_slice()
&& first_tsc_post_run.is_none()
{
first_tsc_post_run = Some(tsc.tsc());
}
last_tsc = tsc.tsc();
}
Ok(Packet::Cbr(cbr)) => {
current_cbr = cbr.ratio();
@ -104,7 +111,7 @@ pub fn analyze_dump(
.unwrap()
.tsc_frequency()
.unwrap();
let total_seconds_tsc = (last_tsc - first_tsc.unwrap()) as f64 / f_tsc as f64;
let total_seconds_tsc = (first_tsc_post_run.unwrap() - first_tsc_main.unwrap()) as f64 / f_tsc as f64;
Ok(AnalyzeData {
packets: total,