ollama is stuck in a likely unclassified userspace loop: 12.32% of sampled CPU passed through unresolved offset, with repeated thread backtraces show 1 thread(s) around 0x000055c5c39ed143 in ?? () and 1 thread(s) around 0x000055c5c39ed143 in ?? ().
highscore: 106reports: 2successful triagetriaged: 2026-05-26 01:34 UTCvalidation: ready103 matching handoffs
Attempt Summary
ollama likely remains stuck in an unclassified userspace loop. A diagnosis report was created even though no patchable workspace was available: opportunity 92086 has no repo root, package name, or source package
Likely owner
local executable ollama
Reason: workspace-acquisition
Next steps
- Find the upstream project, local checkout, container image, or manual install source that provided local executable ollama.
- Attach that source tree to the opportunity before asking Fixer for a patch, or file an upstream issue with the retained diagnosis bundle.
- Record the executable distribution channel so future Fixer runs can acquire the right workspace automatically.
Full published attempt: /issues/019dd37a-eda1-7411-9089-0f3b6dd792aa. Issue JSON: /v1/issues/019dd37a-eda1-7411-9089-0f3b6dd792aa
postgres is stuck in a likely busy poll loop: 7.88% of sampled CPU passed through vma_alloc_folio_noprof, with repeated thread backtraces show 1 thread(s) around 0x00007f322d29a7d2 in ?? () from target:<path>.
highpackage: postgresql-18source: postgresql-18score: 106reports: 2successful triagetriaged: 2026-09-21 01:39 UTCvalidation: ready32 matching handoffs
Attempt Summary
postgres likely remains stuck in a busy-poll loop. A diagnosis report and external handoff were created locally.
Likely owner
postgresql-18
Reason: workspace-acquisition
Suggested bug target: http://www.postgresql.org/
Next steps
- File an upstream or vendor issue with the diagnosis bundle and package metadata.
- Include the workspace acquisition note so maintainers know why no local source patch was attempted.
Full published attempt: /issues/019d481b-e5ab-72f1-b355-16c12abe64c8. Issue JSON: /v1/issues/019d481b-e5ab-72f1-b355-16c12abe64c8
htop is stuck in a likely unclassified userspace loop: 10.31% of sampled CPU passed through lock_next_vma, with repeated no dominant syscall sample was captured.
highpackage: htopsource: htopscore: 106reports: 2successful triagetriaged: 2026-05-27 23:39 UTCvalidation: ready20 matching handoffs
Attempt Summary
htop likely remains stuck in an unclassified userspace loop. Fixer produced a diagnosis report and intentionally skipped an automatic package patch attempt because the evidence is not specific enough to choose a safe source change.
Likely owner
external dependency or workload outside the current source tree
Reason: weak-unknown-runaway-evidence
Next steps
- Confirm the hotspot still points at external dependency or workload outside the current source tree with a fresh perf sample before filing the bug.
- Capture the actual hot backend or child process rather than the parent service wrapper if the issue recurs.
- Map external dependency or workload outside the current source tree to its owning package or project and file an upstream or distro bug with the summarized evidence.
- If the owner is still unclear, collect another short strace plus `/proc/<pid>/maps` at the moment of the spike.
Full published attempt: /issues/019d3a17-ed96-71d2-b0d6-b5e31a22daa2. Issue JSON: /v1/issues/019d3a17-ed96-71d2-b0d6-b5e31a22daa2
sshd-session is stuck in a likely unclassified userspace loop: 100.00% of sampled CPU passed through pfn_to_dma_pte, with repeated thread backtraces show 1 thread(s) around 0x00007efcc509a7d2 in ?? () from target:<path>.
highpackage: openssh-serversource: opensshscore: 106reports: 2successful triagetriaged: 2026-09-21 02:17 UTCvalidation: ready18 matching handoffs
Attempt Summary
sshd-session likely remains stuck in an unclassified userspace loop. A diagnosis report and external handoff were created locally.
Likely owner
openssh
Reason: workspace-acquisition
Suggested bug target: https://www.openssh.com/
Next steps
- File an upstream or vendor issue with the diagnosis bundle and package metadata.
- Include the workspace acquisition note so maintainers know why no local source patch was attempted.
Full published attempt: /issues/019d3e22-7b2d-7dd0-996a-bcf55a74d3e9. Issue JSON: /v1/issues/019d3e22-7b2d-7dd0-996a-bcf55a74d3e9
python3.11 is stuck in a likely busy poll loop: 18.50% of sampled CPU passed through sched_mm_cid_remote_clear, with repeated thread backtraces show 24 thread(s) around 0x00007fcc05248f16 in ?? () from target:<path>.
highsource: linuxscore: 106reports: 1successful triagetriaged: 2026-05-23 08:44 UTCvalidation: ready17 matching handoffs
Attempt Summary
python3.11 likely remains stuck in a busy-poll loop. A diagnosis report was created even though no patchable workspace was available: opportunity 91495 has no repo root, package name, or source package
Likely owner
python module wyoming_faster_whisper
Reason: workspace-acquisition
Next steps
- Find the application, module repository, Home Assistant add-on, container image, or local checkout that provides python module wyoming_faster_whisper.
- Attach that source tree before asking Fixer for a patch; only patch the interpreter/runtime after a language-level stack or minimal reproducer proves the runtime is at fault.
- Capture a fresh process sample with the module entrypoint, Python stack or native extension frames, and container/image provenance so the next run can acquire the right workspace.
Full published attempt: /issues/019dfcc4-b34c-77a3-ae75-084be47aaede. Issue JSON: /v1/issues/019dfcc4-b34c-77a3-ae75-084be47aaede
python3.13 is stuck in a likely busy poll loop: 50.00% of sampled CPU passed through read_tsc, with repeated thread backtraces show 1 thread(s) around 0x00007f1c6e7efe92 in pthread_attr_destroy () from target:<path>.
highpackage: python3.13-minimalsource: python3.13score: 106reports: 2successful triagetriaged: 2026-09-28 08:48 UTCvalidation: ready4 matching handoffs
Attempt Summary
python3.13 likely remains stuck in a busy-poll loop. A diagnosis report and external handoff were created locally.
Likely owner
python3.13
Reason: likely-external-root-cause
Next steps
- Confirm the hotspot still points at python3.13 with a fresh perf sample before filing the bug.
- Capture the actual hot backend or child process rather than the parent service wrapper if the issue recurs.
- Map python3.13 to its owning package or project and file an upstream or distro bug with the summarized evidence.
- If the owner is still unclear, collect another short strace plus `/proc/<pid>/maps` at the moment of the spike.
Published Session Excerpt
## Plan Pass
## Problem
The evidence names `/usr/bin/python3 /usr/bin/supervisord -n -c /etc/supervisor/supervisord.conf`, but does not identify a CPython defect. Its five-second trace shows `wait4(..., WNOHANG)` returning `ECHILD`, followed by a one-second `poll()` timeout. That is consistent with the supervisor’s event loop; the separate high CPU figure is not explained by this short trace.
## Evidence Confidence
inferred
This is profiler/trace evidence, not an independently reproduced failure. The sampled process is `supervisord`; no failing behavior is established in the Python runtime or application entrypoint.
## Proposed Subject
No source patch proposed; diagnose the supervisor-side polling and collect better evidence before attributing the CPU use to CPython.
## Patch Plan
- Do not change CPython source based on this evidence. The supervisor application/configuration is outside this repository.
- If new evidence identifies a CPython call or regression, investigate that application entrypoint first, then the implicated runtime path.
- `README.rst` points contributors to the CPython Developer Guide; no local contribution guide or relevant helper API was found. The socket polling wrappers in `Modules/socketmodule.c` are unrelated to this trace.
- No prior Fixer patch is present to improve or replace. For any future upstream patch, use `master` as the integration base; the workspace is on `master`.
## Risks
A speculative runtime change could alter unrelated polling or process behavior without addressing the reported CPU use. The trace’s one-second waits and sleeping process state do not establish a busy loop in CPython.
## Validation
- For a future source change, first try the workspace-root project entrypoint: `./configure && make`. If dependencies or generated files prevent it, record the exact command and failure, then run the narrowest reproducible relevant compile or test.
- Independently inspect or reproduce the supervisor behavior using its command/configuration and a longer CPU/profile capture, if that environment is available. The current five-second trace alone cannot reproduce the reported CPU signal; no focused CPython compile is warranted without a source change.
## Patch Pass
Subject: Diagnose supervisor polling trace; no CPython patch
## Commit Message
No source change. The available trace does not establish a CPython bug: it
[truncated]
Full published attempt: /issues/019da8df-cd0c-7880-ab1e-6dd908d64437. Issue JSON: /v1/issues/019da8df-cd0c-7880-ab1e-6dd908d64437
postgres is stuck in a likely busy poll loop: 1.80% of sampled CPU passed through __list_del_entry_valid_or_report, with repeated thread backtraces show 1 thread(s) around 0x00007f65ebc06687 in _IO_adjust_column () from target:<path>.
highpackage: postgresql-14source: linuxscore: 106reports: 2successful triagetriaged: 2026-09-21 02:33 UTCvalidation: ready4 matching handoffs
Attempt Summary
postgres likely remains stuck in a busy-poll loop. A diagnosis report was created even though no patchable workspace was available: opportunity 451875 has no repo root, package name, or source package
Likely owner
the upstream maintainer
Reason: workspace-acquisition
Next steps
- Review the package metadata and attach a source tree or upstream clone if one exists.
- If no patchable tree is available, file an external bug using the diagnosis bundle.
Full published attempt: /issues/019dbb32-2e8b-7290-81ab-fe0fc2a39939. Issue JSON: /v1/issues/019dbb32-2e8b-7290-81ab-fe0fc2a39939
bch-copygc/1fbcd59c-f37c-406e-a230-85502e8fc026 shows a repeated `D`-state wait, likely blocked in filesystem io wait via submit_bio_wait.
highpackage: linux-image-7.0.3+deb14-amd64source: linuxscore: 110reports: 1successful triagetriaged: 2026-09-21 03:19 UTCvalidation: ready2 matching handoffs
Attempt Summary
bch-copygc/1fbcd59c-f37c-406e-a230-85502e8fc026 likely remains stuck in a filesystem io wait. Fixer produced a diagnosis report and intentionally skipped a package patch attempt because the wait appears to be below user space.
Likely owner
external dependency or workload outside the current source tree
Reason: likely-external-root-cause
Next steps
- Confirm the hotspot still points at external dependency or workload outside the current source tree with a fresh perf sample before filing the bug.
- Capture the actual hot backend or child process rather than the parent service wrapper if the issue recurs.
- Map external dependency or workload outside the current source tree to its owning package or project and file an upstream or distro bug with the summarized evidence.
- If the owner is still unclear, collect another short strace plus `/proc/<pid>/maps` at the moment of the spike.
Full published attempt: /issues/019e0bd9-4119-7d10-9c97-c8c65587e218. Issue JSON: /v1/issues/019e0bd9-4119-7d10-9c97-c8c65587e218
perl is stuck in a likely busy poll loop: 100.00% of sampled CPU passed through perf_ctx_enable, with repeated thread backtraces show 1 thread(s) around 0x00007f82eb9e87d2 in ?? () from target:<path>.
highpackage: perl-basesource: perlscore: 106reports: 2successful triagetriaged: 2026-10-03 12:14 UTCvalidation: ready2 matching handoffs
Attempt Summary
perl likely remains stuck in a busy-poll loop. A diagnosis report and external handoff were created locally.
Likely owner
perl
Reason: likely-external-root-cause
Suggested bug target: https://dev.perl.org/perl5/
Next steps
- Confirm the hotspot still points at perl with a fresh perf sample before filing the bug.
- Capture the actual hot backend or child process rather than the parent service wrapper if the issue recurs.
- Map perl to its owning package or project and file an upstream or distro bug with the summarized evidence.
- If the owner is still unclear, collect another short strace plus `/proc/<pid>/maps` at the moment of the spike.
Published Session Excerpt
## Plan Pass
## Problem
Fixer reported a likely busy-poll loop for `munin-node`, but the evidence does not establish a script-level CPU loop. The captured `pselect6` calls timed out after about 1.8 and 2 seconds; the process was sleeping, and the hot-path symbol was in the kernel. The entrypoint delegates to `Munin::Node::Server->run`, whose accept loop is inherited from `Net::Server::Fork`.
## Evidence Confidence
**inferred** — source inspection found no busy loop in the node event path, and the captured waits look blocking rather than tight polling. The inherited `Net::Server::Fork` loop remains outside this source tree. Do not present this as a confirmed Munin bug or propose a source patch without stronger evidence.
## Proposed Subject
No patch planned. Diagnose this as an unconfirmed likely false positive, pending evidence that ties CPU consumption to Munin code or its inherited server loop.
## Patch Plan
- Make no source changes; no prior Fixer patch is present to improve or replace.
- The entrypoint at `script/munin-node:88` delegates to the server; connection reads block in `lib/Munin/Node/Server.pm:397`, and plugin-output reads use blocking `select` in `lib/Munin/Node/OS.pm:81`.
- `CONTRIBUTING.md` points to `HACKING.pod` for style. That guide says bug-fix patches target `stable-2.0`; absent contrary contribution guidance, use that base if a fix is later supported. No event-loop helper requiring a patch was identified.
- If further evidence implicates a loop, first inspect the installed `Net::Server::Fork` implementation; avoid changing the Perl runtime absent proof of a runtime defect. No awkward control flow is proposed.
## Risks
Changing Munin behavior based on these samples could mask the real source of CPU use. The available trace does not independently demonstrate a user-visible failure, and the inherited event loop has not been inspected.
## Validation
- From the workspace root, try `make` first, then `make check` only if that target exists; this Makefile exposes `build` and `test`, but no `check` target. If build prerequisites or generated files are missing, record the exact command and failure, then use the narrowest relevant Perl compile/test available from a clean checkout.
- Bounded reproduction attempt: if the original process is available, capture `ps` state and a short `strace -p <pid> -e pselect6,select,poll,ppoll -tt -T` samp
[truncated]
Full published attempt: /issues/019e4743-6f51-7fc1-b372-9900d37706a1. Issue JSON: /v1/issues/019e4743-6f51-7fc1-b372-9900d37706a1
python3.13 is stuck in a likely busy poll loop: 100.00% of sampled CPU passed through unresolved offset, with repeated thread backtraces show 1 thread(s) around 0x00007f091ce537d2 in ?? () from target:<path>.
highpackage: python3.13-minimalsource: python3.13score: 106reports: 2successful triagetriaged: 2026-09-20 06:41 UTCvalidation: ready2 matching handoffs
Attempt Summary
python3.13 likely remains stuck in a busy-poll loop. A diagnosis report and external handoff were created locally.
Likely owner
python script /usr/bin/supervisord
Reason: workspace-acquisition
Next steps
- Find the application, module repository, Home Assistant add-on, container image, or local checkout that provides python script /usr/bin/supervisord.
- Attach that source tree before asking Fixer for a patch; only patch the interpreter/runtime after a language-level stack or minimal reproducer proves the runtime is at fault.
- Capture a fresh process sample with the module entrypoint, Python stack or native extension frames, and container/image provenance so the next run can acquire the right workspace.
Full published attempt: /issues/019dc2a0-9ae7-7f42-8f59-415fe22abe51. Issue JSON: /v1/issues/019dc2a0-9ae7-7f42-8f59-415fe22abe51
systemd-journald shows a repeated `D`-state wait, likely blocked in unknown uninterruptible wait via do_epoll_wait.
highpackage: systemdsource: systemdscore: 110reports: 2successful triagetriaged: 2026-09-21 03:11 UTCvalidation: ready
Attempt Summary
systemd-journald likely remains stuck in an unclassified uninterruptible wait. A diagnosis report and external handoff were created locally.
Likely owner
systemd
Reason: workspace-acquisition
Suggested bug target: https://systemd.io
Next steps
- File an upstream or vendor issue with the diagnosis bundle and package metadata.
- Include the workspace acquisition note so maintainers know why no local source patch was attempted.
Full published attempt: /issues/019d9d27-781c-7040-a3c3-e4d59c1f7bad. Issue JSON: /v1/issues/019d9d27-781c-7040-a3c3-e4d59c1f7bad
python3.13 shows a repeated `D`-state wait, likely blocked in unknown uninterruptible wait via folio_wait_bit_common.
highpackage: python3.13-minimalsource: python3.13score: 110reports: 2successful triagetriaged: 2026-09-21 02:55 UTCvalidation: ready
Attempt Summary
python3.13 likely remains stuck in an unclassified uninterruptible wait. A diagnosis report and external handoff were created locally.
Likely owner
python script /home/kom/tasks-loop/src/scripts/rag_backfill_embeddings.py
Reason: workspace-acquisition
Next steps
- Find the application, module repository, Home Assistant add-on, container image, or local checkout that provides python script /home/kom/tasks-loop/src/scripts/rag_backfill_embeddings.py.
- Attach that source tree before asking Fixer for a patch; only patch the interpreter/runtime after a language-level stack or minimal reproducer proves the runtime is at fault.
- Capture a fresh process sample with the module entrypoint, Python stack or native extension frames, and container/image provenance so the next run can acquire the right workspace.
Full published attempt: /issues/019d3b87-bcdb-7a01-8fd2-53d099979514. Issue JSON: /v1/issues/019d3b87-bcdb-7a01-8fd2-53d099979514
sshd-auth is stuck in a likely busy poll loop: 100.00% of sampled CPU passed through tcp_event_new_data_sent, with repeated read x5, write x5, clock_nanosleep x2.
highpackage: openssh-serversource: opensshscore: 106reports: 2successful triagetriaged: 2026-10-09 23:48 UTCvalidation: review-rejected
Attempt Summary
sshd-auth likely remains stuck in a busy-poll loop. Fixer re-reviewed the previous patch, found it stale or incorrect, and reopened the issue for another pass. No replacement patch survived review yet.
Likely owner
external dependency or workload outside the current source tree
Reason: stale-best-patch
Next steps
- Confirm the hotspot still points at external dependency or workload outside the current source tree with a fresh perf sample before filing the bug.
- Capture the actual hot backend or child process rather than the parent service wrapper if the issue recurs.
- Map external dependency or workload outside the current source tree to its owning package or project and file an upstream or distro bug with the summarized evidence.
- If the owner is still unclear, collect another short strace plus `/proc/<pid>/maps` at the moment of the spike.
Published Session Excerpt
## Plan Pass
## Problem
- Fixer observed one `sshd-auth` process in a 3-second profile. The sample reports a kernel networking symbol, `tcp_event_new_data_sent`, and the syscall sequence `read`, `clock_nanosleep`, `write`; it does not identify an OpenSSH hot path.
- The backtrace capture failed, and the referenced raw trace files are unavailable in this workspace. This evidence does not establish an OpenSSH busy loop or a source-level defect.
## Evidence Confidence
- **observed** — the process and profile signal were observed by Fixer, but the proposed busy-poll interpretation is not independently reproduced. This is not enough evidence for a patch.
## Proposed Subject
- No source patch proposed. Diagnose the profile attribution before suggesting an OpenSSH change.
## Patch Plan
- No files to change. The `sshd-auth` entrypoint proceeds through KEX and authentication dispatch; the source also has blocking poll/dispatch paths, but the profile does not connect its kernel sample to any of them.
- Authentication code is high-risk. Without reproducing the behavior and analyzing its semantic impact, a source patch is not appropriate. No prior Fixer patch was found to improve or replace.
- `README.md` is present; no `CONTRIBUTING`, `HACKING`, `README-hacking`, `docs/`, or `dev-docs/` contribution guidance was found. The repository’s event loops use `poll()`/`ppoll()` directly, and local buffer/allocation helpers include `sshbuf` and `xmalloc`; no relevant helper supports a speculative change. For any later upstream patch, use the workspace’s `master` integration branch as the base, not the Debian source snapshot.
- If further evidence becomes available, first collect a usable backtrace and syscall trace during the reported condition, then distinguish packet I/O, dispatch, cryptographic work, and monitor RPC latency. Avoid changing control flow, including adding a `goto`, absent a demonstrated bug.
## Risks
- Treating a kernel networking sample as an OpenSSH defect could lead to an ineffective or harmful change in authentication code. The single process, short profile, failed backtrace, and unavailable raw artifacts leave attribution uncertain.
## Validation
- First try the project-level entrypoint from the workspace root: `./configure && make`. If it fails because dependencies or generated files are missing, record the exact failure before considering a
[truncated]
Full published attempt: /issues/019e5b4d-626d-7493-8c66-015e945a13ab. Issue JSON: /v1/issues/019e5b4d-626d-7493-8c66-015e945a13ab
sshd-session is stuck in a likely unclassified userspace loop: 21.93% of sampled CPU passed through locks_remove_file, with repeated thread backtraces show 1 thread(s) around 0x00007f726ec9a7d2 in ?? () from target:<path>.
highpackage: openssh-serversource: opensshscore: 106reports: 2successful triagetriaged: 2026-10-05 08:04 UTCvalidation: ready
Attempt Summary
sshd-session likely remains stuck in an unclassified userspace loop. A diagnosis report was created, but the automated patch attempt stopped before completion: No such file or directory (os error 2)
Likely owner
external dependency or workload outside the current source tree
Reason: automatic-patch-blocked
Next steps
- Confirm the hotspot still points at external dependency or workload outside the current source tree with a fresh perf sample before filing the bug.
- Capture the actual hot backend or child process rather than the parent service wrapper if the issue recurs.
- Map external dependency or workload outside the current source tree to its owning package or project and file an upstream or distro bug with the summarized evidence.
- If the owner is still unclear, collect another short strace plus `/proc/<pid>/maps` at the moment of the spike.
Full published attempt: /issues/019e6049-7500-76f3-8131-a20112312129. Issue JSON: /v1/issues/019e6049-7500-76f3-8131-a20112312129
postgres is stuck in a likely unclassified userspace loop: 100.00% of sampled CPU passed through AtEOXact_Enum, with repeated thread backtraces show 1 thread(s) around 0x00007f322d29a7d2 in ?? () from target:<path>.
highpackage: postgresql-18source: postgresql-18score: 106reports: 2successful triagetriaged: 2026-10-02 10:03 UTCvalidation: ready
Attempt Summary
postgres likely remains stuck in an unclassified userspace loop. A diagnosis report was created, but the automated patch attempt stopped before completion: failed to fetch upstream default branch in /var/lib/fixer/sources/upstream/postgresql-18
Likely owner
external dependency or workload outside the current source tree
Reason: automatic-patch-blocked
Next steps
- Confirm the hotspot still points at external dependency or workload outside the current source tree with a fresh perf sample before filing the bug.
- Capture the actual hot backend or child process rather than the parent service wrapper if the issue recurs.
- Map external dependency or workload outside the current source tree to its owning package or project and file an upstream or distro bug with the summarized evidence.
- If the owner is still unclear, collect another short strace plus `/proc/<pid>/maps` at the moment of the spike.
Full published attempt: /issues/019e6423-7fbe-7aa1-8828-2f61e060d90b. Issue JSON: /v1/issues/019e6423-7fbe-7aa1-8828-2f61e060d90b
ollama is stuck in a likely unclassified userspace loop: 12.27% of sampled CPU passed through unresolved offset, with repeated thread backtraces show 1 thread(s) around 0x000055c5c39ed143 in ?? () and 1 thread(s) around 0x000055c5c39ed143 in ?? ().
highscore: 106reports: 3successful triagetriaged: 2026-09-25 05:52 UTCvalidation: ready
Attempt Summary
ollama likely remains stuck in an unclassified userspace loop. A diagnosis report and external handoff were created locally.
Likely owner
ollama
Reason: likely-external-root-cause
Suggested bug target: https://github.com/ollama/ollama.git
Next steps
- Confirm the hotspot still points at ollama with a fresh perf sample before filing the bug.
- Capture the actual hot backend or child process rather than the parent service wrapper if the issue recurs.
- Map ollama to its owning package or project and file an upstream or distro bug with the summarized evidence.
- If the owner is still unclear, collect another short strace plus `/proc/<pid>/maps` at the moment of the spike.
Published Session Excerpt
## Plan Pass
## Problem
- Fixer observed Ollama `serve` running CPU-hot, but the available profile does not identify a responsible function: the hottest Ollama frame is an unresolved offset (12.27%), and the syscall sample is mostly `futex`.
- The repeated stacks are unsymbolized, and the capture includes a debugger library/version warning. The evidence does not establish that Ollama’s Go server code caused the CPU use.
## Evidence Confidence
- inferred
- This is a diagnosis-only plan, not a source-patch proposal. Before considering a patch, collect a symbolized profile from the exact executable and reproduce the CPU-hot behavior under a documented workload.
## Proposed Subject
- No patch subject: diagnose the CPU hotspot before proposing a code change.
## Patch Plan
- Do not edit source in this pass. The local-executable evidence names a CPU-hot process, not a confirmed bug or responsible code path.
- The independent source scout traced `ollama serve` through `main.go` and `cmd/` into `server/routes.go`; model execution is delegated to a `llama-server` subprocess launched from `llm/llama_server.go`. The Go scheduler and health-polling paths do not, by themselves, explain the observed CPU signal.
- If follow-up profiling attributes the hotspot to repository code, trace the owning function and callers, then propose the smallest targeted fix. If it attributes the hotspot to the native runtime, investigate that runtime as a separate target rather than patching unrelated Go code.
- `CONTRIBUTING.md` and `docs/development.md` direct contributors to the documented build workflow; the workspace is on `master`, the upstream integration base. No relevant local helper API or subsystem-specific style convention has been identified for a diagnosis-only change. Avoid speculative control-flow changes, including `goto`.
## Risks
- A source change now would risk “fixing” the wrong layer: symbol names are unresolved, the evidence does not identify a workload, and the runtime implementation may be outside this repository.
- The profile alone cannot distinguish expected worker synchronization from an unintended loop; do not present it as a confirmed user-visible failure.
## Validation
- First try the requested project-level entrypoint from the workspace root: `cmake -S . -B build-fix -G Ninja && cmake --build build-fix && ctest --test-dir build-fix --output-on-fail
[truncated]
Full published attempt: /issues/019dd7a7-430c-79a0-bc5b-7549a044b3fc. Issue JSON: /v1/issues/019dd7a7-430c-79a0-bc5b-7549a044b3fc
python3.13 is stuck in a likely file not found retry loop: 5.58% of sampled CPU passed through _PyEval_EvalFrameDefault, with repeated thread backtraces show 1 thread(s) around __internal_syscall_cancel (a1=..., a2=..., a3=..., a4=..., a5=..., a6=..., nr=...) at .<path>:44.
highpackage: python3.13-minimalsource: python3.13score: 106reports: 2successful triagetriaged: 2026-09-20 17:41 UTCvalidation: ready
Attempt Summary
python3.13 likely remains stuck in a file-not-found retry loop. A diagnosis report and external handoff were created locally.
Likely owner
local executable python
Reason: workspace-acquisition
Next steps
- Find the upstream project, local checkout, container image, or manual install source that provided local executable python.
- Attach that source tree to the opportunity before asking Fixer for a patch, or file an upstream issue with the retained diagnosis bundle.
- Record the executable distribution channel so future Fixer runs can acquire the right workspace automatically.
Full published attempt: /issues/019d6625-be79-7112-9f02-a3fe9af292db. Issue JSON: /v1/issues/019d6625-be79-7112-9f02-a3fe9af292db
redis-check-rdb is stuck in a likely busy poll loop: 4.39% of sampled CPU passed through migrate_enable, with repeated thread backtraces show 1 thread(s) around 0x00007fbc72ca5ffe in ?? () and 1 thread(s) around 0x00007fbc72ca5ffe in ?? ().
highpackage: redis-toolssource: redisscore: 106reports: 2successful triagetriaged: 2026-09-20 10:26 UTCvalidation: ready
Attempt Summary
redis-check-rdb likely remains stuck in a busy-poll loop. A diagnosis report and external handoff were created locally.
Likely owner
redis
Reason: workspace-acquisition
Suggested bug target: https://redis.io/
Next steps
- File an upstream or vendor issue with the diagnosis bundle and package metadata.
- Include the workspace acquisition note so maintainers know why no local source patch was attempted.
Full published attempt: /issues/019e0703-2053-7611-b9a3-bb89d6e6f777. Issue JSON: /v1/issues/019e0703-2053-7611-b9a3-bb89d6e6f777
postgres is stuck in a likely file not found retry loop: 4.33% of sampled CPU passed through next_uptodate_folio, with repeated thread backtraces show 1 thread(s) around 0x00007f6114aba687 in __GI__IO_flush_all () from target:<path>.
highpackage: postgresql-14source: linuxscore: 106reports: 3successful triagetriaged: 2026-09-20 08:49 UTCvalidation: ready
Attempt Summary
postgres likely remains stuck in a file-not-found retry loop. A diagnosis report and external handoff were created locally.
Likely owner
postgresql-14
Reason: workspace-acquisition
Next steps
- Review the package metadata and attach a source tree or upstream clone if one exists.
- If no patchable tree is available, file an external bug using the diagnosis bundle.
Full published attempt: /issues/019d3a17-b958-7a60-86fd-5304e697f42c. Issue JSON: /v1/issues/019d3a17-b958-7a60-86fd-5304e697f42c
rsync is stuck in a likely busy poll loop: 17.41% of sampled CPU passed through clear_page_erms, with repeated thread backtraces show 1 thread(s) around 0x00007f320e09bcb2 in __libc_alloca_cutoff () from target:<path>.
highpackage: rsyncsource: rsyncscore: 106reports: 2successful triagetriaged: 2026-09-20 05:36 UTCvalidation: ready
Attempt Summary
rsync likely remains stuck in a busy-poll loop. A diagnosis report and external handoff were created locally.
Likely owner
rsync
Reason: workspace-acquisition
Suggested bug target: https://rsync.samba.org/
Next steps
- File an upstream or vendor issue with the diagnosis bundle and package metadata.
- Include the workspace acquisition note so maintainers know why no local source patch was attempted.
Full published attempt: /issues/019e1a88-12a2-79f0-8a00-0794e663896a. Issue JSON: /v1/issues/019e1a88-12a2-79f0-8a00-0794e663896a
python3.13 is stuck in a likely unclassified userspace loop: 4.70% of sampled CPU passed through _PyEval_EvalFrameDefault, with repeated thread backtraces show 1 thread(s) around 0x00007fc1cb5849ee in __pthread_rwlock_wrlock_full64 () from target:<path>.
highpackage: python3.13-minimalsource: python3.13score: 106reports: 3successful triagetriaged: 2026-09-20 01:36 UTCvalidation: ready
Attempt Summary
python3.13 likely remains stuck in an unclassified userspace loop. A diagnosis report and external handoff were created locally.
Likely owner
python script ../../utils/docs/postgis_exampletest.py
Reason: workspace-acquisition
Next steps
- Find the application, module repository, Home Assistant add-on, container image, or local checkout that provides python script ../../utils/docs/postgis_exampletest.py.
- Attach that source tree before asking Fixer for a patch; only patch the interpreter/runtime after a language-level stack or minimal reproducer proves the runtime is at fault.
- Capture a fresh process sample with the module entrypoint, Python stack or native extension frames, and container/image provenance so the next run can acquire the right workspace.
Full published attempt: /issues/019d3a01-5de6-7581-9470-f0e29db1b7e8. Issue JSON: /v1/issues/019d3a01-5de6-7581-9470-f0e29db1b7e8
packagekitd is stuck in a likely busy poll loop: 24.42% of sampled CPU passed through syscall_return_via_sysret, with repeated ppoll x4, futex x1.
highpackage: packagekitsource: packagekitscore: 106reports: 2successful triagetriaged: 2026-05-27 23:41 UTCvalidation: ready
Attempt Summary
packagekitd likely remains stuck in a busy-poll loop. A diagnosis report and external handoff were created locally.
Likely owner
packagekit
Reason: workspace-acquisition
Suggested bug target: https://www.freedesktop.org/software/PackageKit/
Next steps
- File an upstream or vendor issue with the diagnosis bundle and package metadata.
- Include the workspace acquisition note so maintainers know why no local source patch was attempted.
Full published attempt: /issues/019d3a77-60b8-79b3-885c-baaa0251e70f. Issue JSON: /v1/issues/019d3a77-60b8-79b3-885c-baaa0251e70f
postgres is stuck in a likely busy poll loop: 22.73% of sampled CPU passed through [.] 0x000000000001066e, with repeated epoll_wait x1.
highpackage: postgresql-18source: postgresql-18score: 106reports: 2successful triagetriaged: 2026-03-29 16:36 UTCvalidation: ready
Attempt Summary
postgres likely remains stuck in a busy poll loop. A diagnosis report and external handoff were created locally.
Likely owner
module `h3_postgis.so` or the workload driving it
Reason: likely-external-root-cause
Next steps
- Confirm the hotspot still points at module `h3_postgis.so` or the workload driving it with a fresh perf sample before filing the bug.
- Capture the actual hot backend or child process rather than the parent service wrapper if the issue recurs.
- Map module `h3_postgis.so` or the workload driving it to its owning package or project and file an upstream or distro bug with the summarized evidence.
- If the owner is still unclear, collect another short strace plus `/proc/<pid>/maps` at the moment of the spike.
Published Session Excerpt
**Root Cause**
The evidence does not support a PostgreSQL core busy-poll bug in the sampled process.
`/proc` shows the sampled `postgres` process sleeping in `ep_poll`, with kernel stack `ep_poll -> do_epoll_wait`, and `strace` shows long `epoll_wait(..., 60000)` calls being interrupted only by `SIGCHLD` and new accepts. That matches normal postmaster behavior, not a spin loop. The CPU hotspot from perf was instead in a deleted external module, `h3_postgis.so`, which is not present anywhere in this source tree. The child backends visible in `strace` are executing short-lived application queries and loading external extensions like `vector.so`; nothing in the captured trace points to a tight loop in PostgreSQL’s wait/latch code in [pqcomm.c](./workspace/src/backend/libpq/pqcomm.c), [latch.c](./workspace/src/backend/storage/ipc/latch.c), or [waiteventset.c](./workspace/src/backend/storage/ipc/waiteventset.c).
The most likely root cause is CPU burn inside an extension/query workload in backend children, with the investigation bundle attributing it to the wrong `postgres` process. The strongest lead is the external `h3_postgis.so` mapping from perf, not PostgreSQL core.
**Patch**
No source change landed. A core PostgreSQL patch here would be speculative and unsafe because the implicated code is outside this repository.
**Validation**
I validated this by:
- Reading the evidence bundle and the actual investigation artifacts on disk.
- Confirming the sampled process was blocked in `epoll_wait`, not runnable in a userspace spin.
- Searching the repository and Debian packaging: there is no `h3_postgis`/PostGIS code in this source tree.
- Reviewing the relevant wait-path implementation in core PostgreSQL; nothing in the captured behavior contradicts normal operation.
No tests were run because no safe code change was made.
For an upstream report, the actionable target is the `h3_postgis`/extension stack or the application query workload, with the key points:
- perf hotspot in deleted `h3_postgis.so`
- sampled postmaster actually sleeping in `epoll_wait`
- repeated short-lived backend children handling application SQL
- repository under test does not contain the implicated extension code
Full published attempt: /issues/019d3a3b-0e57-7393-a88a-5ddf422b5e86. Issue JSON: /v1/issues/019d3a3b-0e57-7393-a88a-5ddf422b5e86
Top frame: n/a [libEGL_nvidia.so.0]
highpackage: google-chrome-stablesource: google-chrome-stablescore: 98reports: 1successful triagetriaged: 2026-03-29 14:36 UTCvalidation: ready
Attempt Summary
A diagnosis and external handoff were created locally because Fixer could not acquire a patchable workspace for google-chrome-stable.
Likely owner
google-chrome-stable
Reason: workspace-acquisition
Next steps
- Confirm the hotspot still points at google-chrome-stable with a fresh perf sample before filing the bug.
- Capture the actual hot backend or child process rather than the parent service wrapper if the issue recurs.
- Map google-chrome-stable to its owning package or project and file an upstream or distro bug with the summarized evidence.
- If the owner is still unclear, collect another short strace plus `/proc/<pid>/maps` at the moment of the spike.
Full published attempt: /issues/019d39bb-3671-7203-9ebb-706e5ee6e351. Issue JSON: /v1/issues/019d39bb-3671-7203-9ebb-706e5ee6e351