adv-accept: no yield, cores 8-95 at nice 10 (ruling 18:4x UTC); report times in UTC; merge build/master

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/analysis/cryptanalysis/report-acceptance-rule.md

@@ -5,7 +5,7 @@ internal adversarial pass, not an independent review
 - Target commit: 017e70376489251e18564c0abce7e466e606c8b3 (class v4 sub-version 3, object byte 7).
 - Crate built: igneum-pow at the frozen commit (this worktree's igneum-pow/ is reset to it; build/master
   diverged by 635 deletions and is not used). Harness: tools/attack/adv-accept (depends on igneum-pow by path).
-- Re-base (19:3x BST): build/master moved to 7a7caa34 whose igneum-pow IS the frozen object; merged at
+- Re-base (18:3x UTC): build/master moved to 7a7caa34 whose igneum-pow IS the frozen object; merged at
   8748e955ceb48be5a6cbf7f8718a4884d3de9828; `git diff --quiet 017e7037 HEAD -- igneum-pow` prints IDENTICAL.
   Nothing measured here was on a stale tree: igneum-pow/ had been reset to the frozen object before the first build.
 - Binary sha256 (first build, box 2): e3d35f4464937f91aac0648e2ee7134f33c85c7aa314b87b33f91059dedc6682 (adv-accept
@@ -15,10 +15,10 @@ internal adversarial pass, not an independent review
   nice 10 on every idle core, the capacity layer's yield (run-box.sh). Logs under
   /srv/builds/igneum-wt-adv-accept/adv/ on each box (spared from the checkout clean by .igneum-scratch-spare; the
   first 10k log on box 2 was wiped by a rebuild before the spare existed and is void anyway: old labels, old binary).
-- Lane scope since 19:2x BST: THE BYPASS (Q1, Q2, Q5). Q3 is lane adv-accept-3's, Q4 lane adv-accept-2's.
+- Lane scope since 18:2x UTC: THE BYPASS (Q1, Q2, Q5). Q3 is lane adv-accept-3's, Q4 lane adv-accept-2's.
 - Seed space: the attack-pass F8 label space (program k = seed_words("igneum-attack-f8/program/k"), era
   ".../era/k"), so `adv-live warps --program k` measures the live hot set of exactly the program the sweep reports.
-- rustc 1.99.0 both sides. First results by 8 October 2026 18:00 BST. GPU: not available, so any per-card
+- rustc 1.99.0 both sides. First results by 8 October 2026 18:00 UTC. GPU: not available, so any per-card
   hash-rate confirmation of a gain is BLOCKED and said so.
 - Box-hours spent so far: about 0.1 (one 7 s build, three short runs). Budget 8.
 
@@ -77,7 +77,7 @@ set (the memory-hard cache, items derived into a table, the cross-hash histogram
 test) is the next run and is what the chip model prices; the closed-form distinct mean is a cheap
 upper bound on how concentrated an accepted program can be on the stand-in.
 
-Numbers land here when the run finishes (first results by 8 October 18:00 BST).
+Numbers land here when the run finishes (first results by 8 October 18:00 UTC).
 
 ## Running notes
 

tools/attack/adv-accept/run-box.sh

@@ -1,10 +1,9 @@
 #!/usr/bin/env bash
-# Start a long adv-accept run on a build box under this lane's rules (coordinator, 7 October 2026, 19:2x UK):
-# nice 10 on every idle core (no core band), and the capacity layer's yield: a 5 s poll of /srv/builds/_locks
-# SIGSTOPs the run's own process group while any build-<k>, measure or quiet lock is held and SIGCONTs it when
-# they clear (infra/build-server/capacity/run.sh). The run never takes a build slot. Pid files beside the log:
-# <log>.pid (the run), <log>.pgid (its process group), <log>.yield.pid (the yield loop). Kill ONLY by pid file:
-#   kill -- -"$(cat <log>.pgid)"; kill "$(cat <log>.yield.pid)"
+# Start a long adv-accept run on a build box under this lane's rules (build-server lane and coordinator, 7 October
+# 2026, 18:4x UTC): nice 10 on cores 8 to 95 only (cores 0 to 7 belong to release builds, the seed and the observer),
+# no SIGSTOP yield (the ruling of 18:4x UTC replaced the capacity layer's yield: the scheduler shares the cores), no build
+# slot taken. Pid files beside the log: <log>.pid (the run) and <log>.pgid (its process group). Kill ONLY by pid file:
+#   kill -- -"$(cat <log>.pgid)"
 # Run ON the box, from anywhere:
 #   run-box.sh <tag> <bin> <args...>
 set -euo pipefail
@@ -13,35 +12,8 @@ dir=/srv/builds/igneum-wt-adv-accept/adv
 mkdir -p "$dir"
 log="$dir/$tag.log"
 [ -x "$bin" ] || { echo "no binary at $bin" >&2; exit 1; }
-# own process group via setsid so STOP/CONT reach every thread and child
-setsid nice -n 10 "$bin" "$@" > "$log" 2>&1 < /dev/null &
+setsid nice -n 10 taskset -c 8-95 "$bin" "$@" > "$log" 2>&1 < /dev/null &
 pid=$!
 pgid=$(ps -o pgid= -p "$pid" 2>/dev/null | tr -d ' '); [ -n "$pgid" ] || pgid="$pid"
 echo "$pid" > "$log.pid"; echo "$pgid" > "$log.pgid"
-locks=/srv/builds/_locks
-held() {   # 0 when any build slot, measure or quiet lock is held
-  local f
-  for f in "$locks"/build-[0-9]* "$locks"/measure "$locks"/quiet; do
-    [ -e "$f" ] || continue
-    exec 9>>"$f"
-    if ! flock -n 9; then exec 9>&-; return 0; fi
-    exec 9>&-
-  done
-  return 1
-}
-(
-  paused=0
-  while kill -0 "$pid" 2>/dev/null; do
-    if held; then
-      if [ "$paused" = 0 ]; then kill -STOP -- "-$pgid" 2>/dev/null && paused=1; echo "$(date -u +%FT%TZ) pause (a build slot or hold is taken)" >> "$log.yield"; fi
-    else
-      if [ "$paused" = 1 ]; then kill -CONT -- "-$pgid" 2>/dev/null; paused=0; echo "$(date -u +%FT%TZ) resume" >> "$log.yield"; fi
-    fi
-    sleep 5
-  done
-  [ "$paused" = 1 ] && kill -CONT -- "-$pgid" 2>/dev/null
-  echo "$(date -u +%FT%TZ) run ended" >> "$log.yield"
-) > /dev/null 2>&1 < /dev/null &
-disown $! 2>/dev/null || true
-echo $! > "$log.yield.pid"
-echo "started pid $pid pgid $pgid yield-loop pid $(cat "$log.yield.pid"); log $log"
+echo "$(date -u +%FT%TZ) started pid $pid pgid $pgid nice 10 cores 8-95; log $log" | tee -a "$log.start"