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prover loop: the CPU path is refused under 32 GB of RAM on every OS with the measured reason, and its tile line names the cost (consequences C22)

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Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This commit is contained in:
igneum-josh 2026-10-05 22:12:37 +01:00
parent 4d3a234e36
commit 6dc686a887
1 changed files with 16 additions and 1 deletions
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17
app/igneum-app/src/prover.rs
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@ -341,6 +341,7 @@ fn loop_forever(shared: Arc<Shared>, bin_dir: PathBuf) {
let mut attempted: HashSet<(String, u32)> = HashSet::new();
let mut attempted_segments: HashSet<u64> = HashSet::new();
let mut tools: Option<Tools> = None;
let ram_mb = crate::detect::total_ram_mb();
let mut last_probe = Instant::now() - Duration::from_secs(600);
let mut submitted: Vec<(u64, String, u32, u128)> = Vec::new();
let mut last_verifier_read = Instant::now() - Duration::from_secs(600);
@ -407,6 +408,20 @@ fn loop_forever(shared: Arc<Shared>, bin_dir: PathBuf) {
}
}
let Some(t) = tools.as_ref() else { continue };
// consequences review C22 (5 October 2026): the SP1 CPU prover takes 29.5 to 30.5 GB of RSS and about five
// minutes a shard whatever the shard size (PC 1, bench-log "the SP1 CPU prover on PC 1"); on a machine under
// 32 GB it would swap the node out, so the CPU path is refused here, Settings or not, with the reason
if !t.cuda {
if let Some(ram) = ram_mb {
if ram < crate::provedefault::MIN_RAM_MB_WINDOWS {
set(&shared, |p| {
p.status = "off".into();
p.message = format!("the CPU prover needs 32 GB of RAM (30 GB measured on PC 1); this machine has {} GB, so proving stays off here", (ram + 512) / 1024);
});
continue;
}
}
}
set(&shared, |p| {
p.enabled = true;
p.available = true;
@ -520,7 +535,7 @@ fn loop_forever(shared: Arc<Shared>, bin_dir: PathBuf) {
if !ok || !fixture.exists() {
return Err(format!("exporter: {}", out.lines().rev().find(|l| !l.trim().is_empty()).unwrap_or("failed")));
}
set(&shared, |p| p.message = if t.cuda { "proving on the GPU".into() } else { "proving on the CPU (slow)".into() });
set(&shared, |p| p.message = if t.cuda { "proving on the GPU".into() } else { "CPU prover: about five minutes a shard, 30 GB of RAM, paid only when no card proves first".into() });
let prover_env = if t.cuda { "cuda" } else { "cpu" };
let (ok, out) = run_tool(&shared, t, &t.host, &[fix_p, "--mode".into(), "compressed".into(), "--shard".into(), w.shard.to_string(), "--prover".into(), payout.clone(), "--out".into(), res_p], &[("SP1_PROVER", prover_env), ("RUST_LOG", "off")], Duration::from_secs(3 * 3600), &dir.join(format!("prove-{}-{}.log", w.number, w.shard)));
if !ok || !results.exists() {