Phase 2 of the live benchmark run experience. Streams sysbench
--report-interval=1 interim lines over a Docker attach so the run view
shows authoritative in-test CPU events/sec and disk read/write MiB/s
(overlaying the Phase 1 host-proxy disk numbers), and fills a
"results so far" strip as each stage completes.
- _runSysbenchCommandStreaming: attaches to the container output for
live onLine callbacks, but returns the authoritative output via
container.logs() after exit -- byte-identical to _runSysbenchCommand,
so the SCORED numbers are unchanged (attach 'data' can flush after
container.wait() resolves, which would truncate the final report).
- CPU + disk stages stream interim eps: / reads:/writes: MiB/s into
setStageMetric; memory stays non-streaming (too fast to sample).
- _emitPartialResult broadcasts each finished stage's raw result on the
progress channel; useBenchmarkRun accumulates them; ResultsSoFar
renders the chip strip.
- Frontend: live CPU ev/s readout+sparkline, disk hero switches to
"Benchmark throughput" when in-test numbers arrive.
Browser-validated on NOMAD3 (System-Only): CPU 6536 ev/s live, disk
10399 MB/s benchmark throughput, results strip, final score 68.3.
Part of #1082 (tracker stays open for Phase 3).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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