sched_ext × Fusion Compiler: cgroup layer measurements (no BPF cosplay) - #14
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sethupathib wants to merge 1 commit into
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sched_ext × Fusion Compiler: cgroup layer measurements (no BPF cosplay)#14sethupathib wants to merge 1 commit into
sethupathib wants to merge 1 commit into
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Measures cgroup v2 cpu.weight / nice / SCHED_BATCH under FC-shaped batch vs interactive-class oversubscription. Documents scx_layered policy mapping without claiming BPF sched_ext was loaded (CONFIG_SCHED_EXT absent on this host). CLAIM_GATE keeps only share wins that survive. Co-authored-by: Sethupathi Balakrishnan <b.sethupathi@gmail.com>
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Why
Prior I/O packaging felt handwavy for LinkedIn. This exercise is a CPU-layer story for multi-tenant FC farm nodes: overnight batch vs interactive-class (debug / Vortex), measured with the control plane that actually exists on this host.
What
New tree:
sched-ext-fc/fc_sched_bench— batch workers + interactive burn/latency probeflat|nice|sched_batch|layers(cgroup 5:1) |protectconfigs/scx_layered_*.json— same policy shape for whenCONFIG_SCHED_EXT=y/sys/kernel/sched_ext(BPF scheduler not loaded)CLAIM_GATE— only cite share wins that passMeasured (2-CPU pin, 6 batch + 1 burn)
POSTABLE_POLICIES=nice,layers,protect— prefer citing layers for the sched_ext narrative.Non-claims
scx_layered/scx_rustyDocs
README.md— dense, no whitepaper theaterLINKEDIN_DRAFT.md— optional post textDEFEND_QA.md