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38 lines
1.3 KiB
C++
38 lines
1.3 KiB
C++
#include "iostats.h"
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#include "string_utils.h"
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#include "timing.hpp"
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#include <fstream>
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Clock::time_point lastUpdate = Clock::now(); /* ns */
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void getIoStats(void *args) {
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iostats *io = reinterpret_cast<iostats *>(args);
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if (io) {
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Clock::time_point now = Clock::now(); /* ns */
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Clock::duration timeDiff = now - lastUpdate;
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float timeDiffSecs = (float)timeDiff.count() / (float)1000000000; // Time diff in seconds
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io->prev.read_bytes = io->curr.read_bytes;
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io->prev.write_bytes = io->curr.write_bytes;
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std::string line;
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std::ifstream f("/proc/self/io");
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while (std::getline(f, line)) {
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if (starts_with(line, "read_bytes:")) {
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try_stoull(io->curr.read_bytes, line.substr(12));
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}
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else if (starts_with(line, "write_bytes:")) {
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try_stoull(io->curr.write_bytes, line.substr(13));
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}
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}
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io->diff.read = (io->curr.read_bytes - io->prev.read_bytes) / (1024.f * 1024.f);
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io->diff.write = (io->curr.write_bytes - io->prev.write_bytes) / (1024.f * 1024.f);
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io->per_second.read = io->diff.read / timeDiffSecs;
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io->per_second.write = io->diff.write / timeDiffSecs;
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lastUpdate = now;
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}
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}
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