{ "type": "excalidraw", "version": 2, "source": "https://excalidraw.com", "elements": [ { "id": "r91450800", "type": "rectangle", "x": 30, "y": 150, "width": 180, "height": 64, "angle": 0, "strokeColor": "#2f6db5", "backgroundColor": "#eef4fb", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1350259542, "versionNonce": 444563676, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t994164998", "type": "text", "x": 40, "y": 158, "width": 77.0, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 901862736, "versionNonce": 1547726394, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "buf[i] = 1", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "buf[i] = 1", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1929950609", "type": "text", "x": 40, "y": 178, "width": 127.05000000000001, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 437350248, "versionNonce": 222437882, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "first touch of a page", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "first touch of a page", "lineHeight": 1.25, "baseline": 11 }, { "id": "r1460168090", "type": "rectangle", "x": 262, "y": 150, "width": 180, "height": 64, "angle": 0, "strokeColor": "#888888", "backgroundColor": "#f4f4f4", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 16781084, "versionNonce": 784153489, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t76011706", "type": "text", "x": 272, "y": 158, "width": 84.7, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1293101634, "versionNonce": 1768859252, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "MMU: no PTE", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "MMU: no PTE", "lineHeight": 1.25, "baseline": 14 }, { "id": "t375499403", "type": "text", "x": 272, "y": 178, "width": 151.25, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1997456194, "versionNonce": 1624673479, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "CPU traps into the kernel", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "CPU traps into the kernel", "lineHeight": 1.25, "baseline": 11 }, { "id": "r122135445", "type": "rectangle", "x": 494, "y": 150, "width": 170, "height": 64, "angle": 0, "strokeColor": "#888888", "backgroundColor": "#f4f4f4", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 769304262, "versionNonce": 1388383907, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1043338024", "type": "text", "x": 504, "y": 158, "width": 138.60000000000002, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 667456768, "versionNonce": 1569108351, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "page-fault handler", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "page-fault handler", "lineHeight": 1.25, "baseline": 14 }, { "id": "t133858299", "type": "text", "x": 504, "y": 178, "width": 90.75000000000001, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 972420976, "versionNonce": 1382719935, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "look up the VMA", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "look up the VMA", "lineHeight": 1.25, "baseline": 11 }, { "id": "r101944641", "type": "rectangle", "x": 716, "y": 24, "width": 226, "height": 54, "angle": 0, "strokeColor": "#111111", "backgroundColor": "#111111", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1033172000, "versionNonce": 1124805880, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t504613553", "type": "text", "x": 726, "y": 32, "width": 138.60000000000002, "height": 17.5, "angle": 0, "strokeColor": "#ffffff", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1282844833, "versionNonce": 1090579390, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "no VMA / bad perms", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "no VMA / bad perms", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1224377938", "type": "text", "x": 726, "y": 52, "width": 42.35, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 406719110, "versionNonce": 658183478, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "SIGSEGV", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "SIGSEGV", "lineHeight": 1.25, "baseline": 11 }, { "id": "r1135793385", "type": "rectangle", "x": 716, "y": 114, "width": 226, "height": 54, "angle": 0, "strokeColor": "#e8870c", "backgroundColor": "#fff8ef", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1679919726, "versionNonce": 1651320190, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1454248751", "type": "text", "x": 726, "y": 122, "width": 169.4, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 54969957, "versionNonce": 1777965997, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "anonymous, first write", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "anonymous, first write", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1447744649", "type": "text", "x": 726, "y": 142, "width": 175.45000000000002, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1734345001, "versionNonce": 1808285506, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "new zero-filled frame \u2014 minor", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "new zero-filled frame \u2014 minor", "lineHeight": 1.25, "baseline": 11 }, { "id": "r1226304676", "type": "rectangle", "x": 716, "y": 204, "width": 226, "height": 54, "angle": 0, "strokeColor": "#e8870c", "backgroundColor": "#fff8ef", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 707671527, "versionNonce": 1798431536, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t978695792", "type": "text", "x": 726, "y": 212, "width": 177.10000000000002, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 865538920, "versionNonce": 415544661, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "file page in page cache", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "file page in page cache", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1389394760", "type": "text", "x": 726, "y": 232, "width": 175.45000000000002, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 459833617, "versionNonce": 219149539, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "map it + fault-around \u2014 minor", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "map it + fault-around \u2014 minor", "lineHeight": 1.25, "baseline": 11 }, { "id": "r802743723", "type": "rectangle", "x": 716, "y": 294, "width": 226, "height": 54, "angle": 0, "strokeColor": "#111111", "backgroundColor": "#ffffff", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1410178975, "versionNonce": 1712821209, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1394843903", "type": "text", "x": 726, "y": 302, "width": 154.0, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 31870353, "versionNonce": 528145639, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "file page not cached", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "file page not cached", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1336624804", "type": "text", "x": 726, "y": 322, "width": 175.45000000000002, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 627558822, "versionNonce": 1775595842, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "read from disk, sleep \u2014 major", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "read from disk, sleep \u2014 major", "lineHeight": 1.25, "baseline": 11 }, { "id": "a964941178", "type": "arrow", "x": 210, "y": 182, "width": 52, "height": 0, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 411578914, "versionNonce": 264417892, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 52, 0 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "a604896770", "type": "arrow", "x": 442, "y": 182, "width": 52, "height": 0, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 1252734626, "versionNonce": 1266862626, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 52, 0 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "t1501956377", "type": "text", "x": 468.0, "y": 168.0, "width": 40, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 694060450, "versionNonce": 1705314067, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "trap", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "trap", "lineHeight": 1.25, "baseline": 11 }, { "id": "a1802520428", "type": "arrow", "x": 664, "y": 166, "width": 52, "height": 115, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "dashed", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 1203913654, "versionNonce": 372906836, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 52, -115 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "a1815229612", "type": "arrow", "x": 664, "y": 176, "width": 52, "height": 35, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 795838264, "versionNonce": 1771125113, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 52, -35 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "a151885908", "type": "arrow", "x": 664, "y": 190, "width": 52, "height": 41, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 780971194, "versionNonce": 599954879, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 52, 41 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "a1294335520", "type": "arrow", "x": 664, "y": 200, "width": 52, "height": 121, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "dashed", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 1260342142, "versionNonce": 1762342100, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 52, 121 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "t343841825", "type": "text", "x": 30, "y": 286, "width": 270.6, "height": 15.0, "angle": 0, "strokeColor": "#1d1d1d", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1615340128, "versionNonce": 1511427405, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "measured this chapter (getrusage deltas):", "fontSize": 12, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "measured this chapter (getrusage deltas):", "lineHeight": 1.25, "baseline": 12 }, { "id": "t256910424", "type": "text", "x": 30, "y": 308, "width": 423.50000000000006, "height": 13.75, "angle": 0, "strokeColor": "#1d1d1d", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 452979141, "versionNonce": 70538224, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "heap 64 MiB written: minor=16385 major=0 \u2014 one fault per touched page", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "heap 64 MiB written: minor=16385 major=0 \u2014 one fault per touched page", "lineHeight": 1.25, "baseline": 11 }, { "id": "t769704440", "type": "text", "x": 30, "y": 326, "width": 514.25, "height": 13.75, "angle": 0, "strokeColor": "#1d1d1d", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1161389993, "versionNonce": 1487988922, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "fault-walk 16 MiB read: minor=32 per 512-page step \u2014 fault-around maps 16 pages/fault", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "fault-walk 16 MiB read: minor=32 per 512-page step \u2014 fault-around maps 16 pages/fault", "lineHeight": 1.25, "baseline": 11 }, { "id": "t288268434", "type": "text", "x": 30, "y": 344, "width": 538.45, "height": 13.75, "angle": 0, "strokeColor": "#1d1d1d", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 241067145, "versionNonce": 365246798, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "major=0 everywhere: the walk file was written moments earlier, so it is in the page cache", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "major=0 everywhere: the walk file was written moments earlier, so it is in the page cache", "lineHeight": 1.25, "baseline": 11 } ], "appState": { "viewBackgroundColor": "#ffffff", "gridSize": null }, "files": {} }