From 738175218ba2bc66ed4d4efeaa9ec3e829676511 Mon Sep 17 00:00:00 2001
From: Quentin Deslandes <qde@naccy.de>
Date: Thu, 28 May 2026 12:32:41 +0200
Subject: [PATCH] tests: benchmarks: add hostname to benchmark metadata

The hostname is now recorded as custom context in the JSON output
alongside gitrev, gitdate, and other run metadata. This makes it
possible to correlate results with the machine that produced them,
which matters when benchmarks are run on different hosts.
---
 tests/benchmarks/benchmark.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tests/benchmarks/benchmark.cpp b/tests/benchmarks/benchmark.cpp
index 427267c2..61feacc3 100644
--- a/tests/benchmarks/benchmark.cpp
+++ b/tests/benchmarks/benchmark.cpp
@@ -241,6 +241,18 @@ static std::string which(const std::string &cmd)
     return {};
 }
 
+std::string hostname()
+{
+    std::array<char, HOST_NAME_MAX + 1> buf {};
+    if (gethostname(buf.data(), buf.size()) != 0) {
+        return {};
+    }
+
+    buf.back() = '\0';
+
+    return std::string(buf.data());
+}
+
 int setup(std::span<char *> args)
 {
     const struct argp argp = {.options = options.data(),
@@ -284,6 +296,7 @@ int setup(std::span<char *> args)
     if (pos != ::std::string::npos)
         config.outfile.replace(pos, pattern.size(), config.gitrev);
 
+    ::benchmark::AddCustomContext("hostname", hostname());
     ::benchmark::AddCustomContext("gitrev", config.gitrev);
     ::benchmark::AddCustomContext("gitdate", ::std::to_string(config.gitdate));
     ::benchmark::AddCustomContext("bfcli", config.bfcli);