CPU caches are binary units, not SI. (#911)

src/reporter.cc

@@ -49,7 +49,7 @@ void BenchmarkReporter::PrintBasicContext(std::ostream *out,
     Out << "CPU Caches:\n";
     for (auto &CInfo : info.caches) {
       Out << "  L" << CInfo.level << " " << CInfo.type << " "
-          << (CInfo.size / 1000) << "K";
+          << (CInfo.size / 1024) << " KiB";
       if (CInfo.num_sharing != 0)
         Out << " (x" << (info.num_cpus / CInfo.num_sharing) << ")";
       Out << "\n";

src/sysinfo.cc

@@ -270,7 +270,7 @@ std::vector<CPUInfo::CacheInfo> GetCacheSizesFromKVFS() {
       else if (f && suffix != "K")
         PrintErrorAndDie("Invalid cache size format: Expected bytes ", suffix);
       else if (suffix == "K")
-        info.size *= 1000;
+        info.size *= 1024;
     }
     if (!ReadFromFile(StrCat(FPath, "type"), &info.type))
       PrintErrorAndDie("Failed to read from file ", FPath, "type");

test/reporter_output_test.cc

@@ -38,9 +38,9 @@ static int AddContextCases() {
   for (size_t I = 0; I < Caches.size(); ++I) {
     std::string num_caches_str =
         Caches[I].num_sharing != 0 ? " \\(x%int\\)$" : "$";
-    AddCases(
-        TC_ConsoleErr,
-        {{"L%int (Data|Instruction|Unified) %intK" + num_caches_str, MR_Next}});
+    AddCases(TC_ConsoleErr,
+             {{"L%int (Data|Instruction|Unified) %int KiB" + num_caches_str,
+               MR_Next}});
     AddCases(TC_JSONOut, {{"\\{$", MR_Next},
                           {"\"type\": \"", MR_Next},
                           {"\"level\": %int,$", MR_Next},