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Add kv_cache size to pipeline generation log. #3989

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Add kv_cache size to pipeline generation log. #3989

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rasapala Feb 18, 2026
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rasapala Feb 19, 2026
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28 changes: 26 additions & 2 deletions src/llm/language_model/continuous_batching/llm_executor.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -59,12 +59,36 @@ struct LLMExecutor {
cv.notify_one();
}

std::string formatBytes(size_t bytes)
{
const double KB = 1024.0;
const double MB = KB * 1024.0;
const double GB = MB * 1024.0;
const double TB = GB * 1024.0;

std::ostringstream oss;
oss << std::fixed << std::setprecision(1);

if (bytes >= TB)
oss << (bytes / TB) << " TB";
else if (bytes >= GB)
oss << (bytes / GB) << " GB";
else if (bytes >= MB)
oss << (bytes / MB) << " MB";
else if (bytes >= KB)
oss << (bytes / KB) << " KB";
else
oss << bytes << " B";

return oss.str();
}

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
void printMetrics() {
ov::genai::PipelineMetrics metrics = pipe->get_metrics();
SPDLOG_LOGGER_INFO(llm_executor_logger, "All requests: {}; Scheduled requests: {}; Cache usage {:.1f}%;",
metrics.requests, metrics.scheduled_requests, metrics.cache_usage);
SPDLOG_LOGGER_INFO(llm_executor_logger, "All requests: {}; Scheduled requests: {}; Cache usage {:.1f}% of {};",
metrics.requests, metrics.scheduled_requests, metrics.cache_usage, formatBytes(metrics.kv_cache_size_in_bytes));
}
};
#pragma GCC diagnostic pop
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