DragonX/ObsidianDragon
1
1
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 10 Wiki Activity

perf(daemon): memoize the external debug.log miss

Browse Source 
When following the debug.log of a node this session did not launch, every
poll re-read the last 2 MB of the file and re-scanned it for the process
banner. If that node logs to its console instead, the banner is never
there, so the full re-scan repeated on every poll for the life of the
process.

- A miss is now remembered by pid and file size: if nothing has changed
  since the last miss, or the file is growing but the backoff has not
  elapsed, the scan is skipped.
- The retry schedule re-scans quickly during a fresh-node grace window
  (the banner flushes a beat after the pid appears) and then backs off
  from 4 s, doubling to a 60 s cap. The memo is cleared on a successful
  tie and when the followed process goes away.

Tests: the retry delay is fast within the grace window and then steps
4, 8, 16 s up to the 60 s cap.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
DanS
2026-10-13 17:42:30 -05:00
co-authored by Claude Opus 4.8
parent 1cd4ea4026
commit 2c9e99c022
4 changed files with 52 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tests/test_phase4.cpp
+13
View File
@@ -6755,6 +6755,19 @@ void testDebugLogTailRules()
EXPECT_TRUE(externalLogFeedOffset(midRun, false, t0) == std::string::npos); // whole file, no banner: can't tell
EXPECT_TRUE(externalLogFeedOffset(oldRun + newRun, false, 0) == std::string::npos);
// C107: the miss-retry schedule: fast in the grace window, then 4,8,...,60 s cap.
{
double b = 0.0;
EXPECT_NEAR(dragonx::daemon::nextExternalLogRetryDelay(0.0, b), 2.0, 1e-9);
EXPECT_NEAR(dragonx::daemon::nextExternalLogRetryDelay(14.9, b), 2.0, 1e-9);
EXPECT_NEAR(b, 0.0, 1e-9);
EXPECT_NEAR(dragonx::daemon::nextExternalLogRetryDelay(15.0, b), 4.0, 1e-9);
EXPECT_NEAR(dragonx::daemon::nextExternalLogRetryDelay(20.0, b), 8.0, 1e-9);
EXPECT_NEAR(dragonx::daemon::nextExternalLogRetryDelay(30.0, b), 16.0, 1e-9);
for (int i = 0; i < 6; ++i) dragonx::daemon::nextExternalLogRetryDelay(100.0, b);
EXPECT_NEAR(b, 60.0, 1e-9);
}
#ifdef _WIN32
const long self = static_cast<long>(GetCurrentProcessId());
#else