{ "type": "excalidraw", "version": 2, "source": "https://excalidraw.com", "elements": [ { "id": "r1390279253", "type": "rectangle", "x": 20, "y": 20, "width": 440, "height": 430, "angle": 0, "strokeColor": "#dddddd", "backgroundColor": "#eef4fb", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1365940760, "versionNonce": 1888668320, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t914074625", "type": "text", "x": 32, "y": 26, "width": 244.20000000000002, "height": 15.0, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 116162596, "versionNonce": 1054139080, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "C++ / Rust \u2014 you write the epoll loop", "fontSize": 12, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "C++ / Rust \u2014 you write the epoll loop", "lineHeight": 1.25, "baseline": 12 }, { "id": "r979643017", "type": "rectangle", "x": 480, "y": 20, "width": 440, "height": 430, "angle": 0, "strokeColor": "#dddddd", "backgroundColor": "#fff8ef", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 610030074, "versionNonce": 1007629437, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1677428427", "type": "text", "x": 492, "y": 26, "width": 356.40000000000003, "height": 15.0, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1955798609, "versionNonce": 1440281122, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "Go \u2014 you write goroutines; the runtime hides the epoll", "fontSize": 12, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "Go \u2014 you write goroutines; the runtime hides the epoll", "lineHeight": 1.25, "baseline": 12 }, { "id": "r1393515539", "type": "rectangle", "x": 60, "y": 70, "width": 360, "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": 1419298340, "versionNonce": 753293654, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t180651057", "type": "text", "x": 70, "y": 78, "width": 192.50000000000003, "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": 66942632, "versionNonce": 619321702, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "1 OS thread (Threads: 1)", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "1 OS thread (Threads: 1)", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1033830475", "type": "text", "x": 70, "y": 98, "width": 242.00000000000003, "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": 613422962, "versionNonce": 508498588, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "epoll_wait \u2014 4 calls for a 50-conn flood", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "epoll_wait \u2014 4 calls for a 50-conn flood", "lineHeight": 1.25, "baseline": 11 }, { "id": "r1641243106", "type": "rectangle", "x": 60, "y": 250, "width": 360, "height": 118, "angle": 0, "strokeColor": "#888888", "backgroundColor": "#f4f4f4", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1649300826, "versionNonce": 802322953, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1370386193", "type": "text", "x": 70, "y": 258, "width": 231.00000000000003, "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": 723196902, "versionNonce": 1162249955, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "kernel eventpoll interest list", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "kernel eventpoll interest list", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1256193513", "type": "text", "x": 70, "y": 278, "width": 187.55, "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": 748485019, "versionNonce": 1126243156, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "tok 0 listener tok 1 signalfd", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "tok 0 listener tok 1 signalfd", "lineHeight": 1.25, "baseline": 11 }, { "id": "t713703305", "type": "text", "x": 70, "y": 293, "width": 254.10000000000002, "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": 1003064836, "versionNonce": 619442360, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "tok 2..N every client socket, one process", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "tok 2..N every client socket, one process", "lineHeight": 1.25, "baseline": 11 }, { "id": "r832814720", "type": "rectangle", "x": 520, "y": 70, "width": 360, "height": 70, "angle": 0, "strokeColor": "#2f6db5", "backgroundColor": "#eef4fb", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 772238666, "versionNonce": 580480374, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t794852119", "type": "text", "x": 530, "y": 78, "width": 300.3, "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": 1131498448, "versionNonce": 411467586, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "goroutine per conn (read + write) + hub", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "goroutine per conn (read + write) + hub", "lineHeight": 1.25, "baseline": 14 }, { "id": "t709031656", "type": "text", "x": 530, "y": 98, "width": 242.00000000000003, "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": 1494348958, "versionNonce": 1249736235, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "channels fan out \u2014 ~7 OS threads total", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "channels fan out \u2014 ~7 OS threads total", "lineHeight": 1.25, "baseline": 11 }, { "id": "r287451905", "type": "rectangle", "x": 520, "y": 185, "width": 360, "height": 64, "angle": 0, "strokeColor": "#111111", "backgroundColor": "#111111", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 748888707, "versionNonce": 412670383, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1058867696", "type": "text", "x": 530, "y": 193, "width": 207.9, "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": 1935263643, "versionNonce": 373230909, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "runtime netpoller (hidden)", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "runtime netpoller (hidden)", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1117855148", "type": "text", "x": 530, "y": 213, "width": 284.35, "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": 18134566, "versionNonce": 1378367471, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "epoll_pwait \u2014 165 calls, edge-triggered EPOLLET", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "epoll_pwait \u2014 165 calls, edge-triggered EPOLLET", "lineHeight": 1.25, "baseline": 11 }, { "id": "r173864000", "type": "rectangle", "x": 520, "y": 300, "width": 360, "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": 1400595557, "versionNonce": 884220039, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1208447907", "type": "text", "x": 530, "y": 308, "width": 146.3, "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": 452041279, "versionNonce": 459025685, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "same kernel sockets", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "same kernel sockets", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1047419941", "type": "text", "x": 530, "y": 328, "width": 181.50000000000003, "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": 951699317, "versionNonce": 1025150638, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "one process, N conns (ss -tp)", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "one process, N conns (ss -tp)", "lineHeight": 1.25, "baseline": 11 }, { "id": "a1677074324", "type": "arrow", "x": 240, "y": 250, "width": 0, "height": 114, "angle": 0, "strokeColor": "#b8650a", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 9339970, "versionNonce": 1575911041, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 0, -114 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "t1944888087", "type": "text", "x": 240.0, "y": 179.0, "width": 145.20000000000002, "height": 13.75, "angle": 0, "strokeColor": "#b8650a", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 593623962, "versionNonce": 1850067142, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "EPOLLIN/EPOLLOUT + token", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "EPOLLIN/EPOLLOUT + token", "lineHeight": 1.25, "baseline": 11 }, { "id": "a1892089442", "type": "arrow", "x": 700, "y": 185, "width": 0, "height": 43, "angle": 0, "strokeColor": "#b8650a", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 1497150968, "versionNonce": 956492662, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 0, -43 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "t271891777", "type": "text", "x": 700.0, "y": 149.5, "width": 139.15, "height": 13.75, "angle": 0, "strokeColor": "#b8650a", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 980043827, "versionNonce": 1197340968, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "park / resume goroutine", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "park / resume goroutine", "lineHeight": 1.25, "baseline": 11 }, { "id": "a441894709", "type": "arrow", "x": 700, "y": 300, "width": 0, "height": 49, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 969291590, "versionNonce": 1410798106, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 0, -49 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "t950958082", "type": "text", "x": 60, "y": 148, "width": 357.50000000000006, "height": 12.5, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1968208069, "versionNonce": 1955929748, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "one thread multiplexes N sockets; state machine is yours to write", "fontSize": 10, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "one thread multiplexes N sockets; state machine is yours to write", "lineHeight": 1.25, "baseline": 10 }, { "id": "t1290743861", "type": "text", "x": 60, "y": 190, "width": 236.50000000000003, "height": 12.5, "angle": 0, "strokeColor": "#b8650a", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1647881203, "versionNonce": 833216433, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "backpressure = outbuf + EPOLLOUT (explicit)", "fontSize": 10, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "backpressure = outbuf + EPOLLOUT (explicit)", "lineHeight": 1.25, "baseline": 10 }, { "id": "t359870873", "type": "text", "x": 520, "y": 395, "width": 484.00000000000006, "height": 12.5, "angle": 0, "strokeColor": "#b8650a", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 987140449, "versionNonce": 1474857800, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "backpressure = blocking channel send (implicit); threaded engine = same code, 51 threads", "fontSize": 10, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "backpressure = blocking channel send (implicit); threaded engine = same code, 51 threads", "lineHeight": 1.25, "baseline": 10 } ], "appState": { "viewBackgroundColor": "#ffffff", "gridSize": null }, "files": {} }