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https://github.com/neoStudiosLCE/neoLegacy.git
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be17d4028f
DLL injector + Python GUI for real-time server metrics. Hooks into tick loop, chunk generation, and player chunk map to collect timing data over TCP, displayed in a tkinter dashboard. Includes bot spawner for load testing.
133 lines
3.7 KiB
C++
133 lines
3.7 KiB
C++
//
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// json_writer.cpp -- Hand-rolled JSON serialization for metric snapshots.
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//
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// No external JSON library dependency. The schema is fixed and simple
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// enough that snprintf is cleaner than pulling in nlohmann/json.
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//
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#include "perf_monitor.h"
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#include <cstdio>
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// Stack buffer size for JSON assembly. A typical tick snapshot is
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// 500-1000 bytes. Autosave snapshots are smaller.
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static constexpr int BUF_SIZE = 4096;
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std::string SerializeTick(const TickSnapshot &s)
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{
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char buf[BUF_SIZE];
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int pos = 0;
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pos += snprintf(buf + pos, BUF_SIZE - pos,
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"{\"type\":\"tick\","
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"\"tick\":%d,"
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"\"timestamp_ms\":%lld,"
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"\"total_us\":%lld,"
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"\"phases\":{",
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s.tick,
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(long long)s.timestampMs,
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(long long)s.totalUs);
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pos += snprintf(buf + pos, BUF_SIZE - pos,
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"\"pool_reset_us\":%lld,",
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(long long)s.poolResetUs);
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// Levels array
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pos += snprintf(buf + pos, BUF_SIZE - pos, "\"levels\":[");
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for (size_t i = 0; i < s.levels.size(); i++) {
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const auto &lm = s.levels[i];
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if (i > 0) buf[pos++] = ',';
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pos += snprintf(buf + pos, BUF_SIZE - pos,
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"{"
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"\"dimension\":%d,"
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"\"level_tick_us\":%lld,"
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"\"entity_tick_us\":%lld,"
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"\"entity_tick_skipped\":%s,"
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"\"tracker_tick_us\":%lld,"
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"\"entity_count\":%d,"
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"\"global_entity_count\":%d,"
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"\"player_count\":%d,"
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"\"loaded_chunks\":%d,"
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"\"entities_to_remove\":%d,"
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"\"tile_entity_count\":%d"
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"}",
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lm.dimension,
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(long long)lm.levelTickUs,
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(long long)lm.entityTickUs,
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lm.entityTickSkipped ? "true" : "false",
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(long long)lm.trackerTickUs,
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lm.entityCount,
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lm.globalEntityCount,
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lm.playerCount,
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lm.loadedChunks,
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lm.entitiesToRemove,
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lm.tileEntityCount);
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}
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pos += snprintf(buf + pos, BUF_SIZE - pos, "],");
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pos += snprintf(buf + pos, BUF_SIZE - pos,
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"\"players_tick_us\":%lld,"
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"\"connection_tick_us\":%lld,"
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"\"console_tick_us\":%lld"
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"},",
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(long long)s.playersTickUs,
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(long long)s.connectionTickUs,
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(long long)s.consoleTickUs);
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pos += snprintf(buf + pos, BUF_SIZE - pos,
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"\"server\":{"
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"\"total_players\":%d,"
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"\"memory_used_mb\":%.1f,"
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"\"memory_total_mb\":%.1f,"
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"\"is_autosaving\":%s,"
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"\"is_paused\":%s,"
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"\"tps_target\":20"
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"}}",
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s.totalPlayers,
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s.memoryUsedMb,
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s.memoryTotalMb,
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s.isAutosaving ? "true" : "false",
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s.isPaused ? "true" : "false");
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return std::string(buf, pos);
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}
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std::string SerializeAutosave(const AutosaveSnapshot &s)
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{
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char buf[BUF_SIZE];
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int pos = snprintf(buf, BUF_SIZE,
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"{\"type\":\"autosave\","
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"\"tick\":%d,"
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"\"timestamp_ms\":%lld,"
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"\"total_us\":%lld,"
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"\"breakdown\":{"
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"\"players_us\":%lld,"
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"\"levels_us\":%lld,"
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"\"rules_us\":%lld,"
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"\"flush_us\":%lld"
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"}}",
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s.tick,
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(long long)s.timestampMs,
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(long long)s.totalUs,
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(long long)s.playersUs,
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(long long)s.levelsUs,
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(long long)s.rulesUs,
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(long long)s.flushUs);
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return std::string(buf, pos);
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}
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std::string SerializeHelloAck(int levelCount)
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{
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char buf[256];
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int pos = snprintf(buf, 256,
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"{\"type\":\"hello_ack\","
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"\"version\":1,"
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"\"server_tps_target\":20,"
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"\"level_count\":%d,"
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"\"dimensions\":[0,-1,1]}",
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levelCount);
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return std::string(buf, pos);
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}
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