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{
  "commit": "359f5ac9000d452b10e6186f07454ab2fc19281b",
  "tree": "457ede3d913a968c8cf707bc1e14d1691d82c551",
  "parents": [
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  ],
  "author": {
    "name": "Brant Qian",
    "email": "siyuanq4@illinois.edu",
    "time": "Tue Oct 20 18:55:21 2026 -0500"
  },
  "committer": {
    "name": "Brant Qian",
    "email": "siyuanq4@illinois.edu",
    "time": "Tue Oct 20 18:55:21 2026 -0500"
  },
  "message": "Poseidon: accuracy targets per site, host functions and single calls as sites\n\nThe accuracy target has one meaning on the CPU and the GPU: the site\u0027s own\ntarget, else -poseidon-tau, drives one search. POSEIDON_OPTIMIZE_TAU(t) now\ncarries its value as a typed annotation argument; a joint solve over sites\nwith different targets is an error. -poseidon-confidence and\nposeidon_confidence are removed.\n\nPOSEIDON_OPTIMIZE on a host function is profiled without user shadows, as a\nkernel is: the function is outlined into a wrapper and a body at pipeline\nstart, and libposeidon_profile_host.a sizes each pointer argument\u0027s shadow\nfrom a registry of the process\u0027s heap allocations (the malloc family is\nreplaced), globals and registered stack objects. A translation unit without a\nhost site leaves the hooks passing through.\n\n__poseidon_optimize(fn, args...) and __poseidon_optimize_tau(t, fn, args...)\nmake one call a site: that call gets its own copy of fn, its own profile,\ntarget, DP table and rewrite, so two calls with different input ranges or\ntargets get different rewrites, and other calls run fn as written.\nposeidon.h and the README list the six ways to opt in, simple to advanced.\n\nThe explorer gains three examples (two targets, two calls of one function, a\nregime split), bounds concurrent searches, memory and solve time, reports a\nsearch that ran out of memory instead of using its result, and serializes\npublishes to the shared Herbie cache. The cost model is measured on the\nmachine that runs the explorer, so the workflow no longer measures one and a\nmissing cost model is an error. Also: analyses are invalidated after the\nmodule is prepared, and a fallback no longer reads a stale DP table.\n",
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