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Fix CPU telemetry temperature/clock speed on Windows and macOS

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sample_cpu_temperature() only ever had a Linux implementation, so
Windows and macOS runs recorded empty temperature data points for
every sample. sample_cpu_clock_mhz() on both platforms read a static
nominal frequency once (Windows: the ~MHz registry value; macOS: the
hw.cpufrequency sysctl) instead of a live reading, so clock speed
showed as a constant throughout the benchmark.

Windows: temperature now queries the ACPI thermal zone over WMI
(MSAcpi_ThermalZoneTemperature), and clock speed reads live per-core
frequency via CallNtPowerInformation(ProcessorInformation). Both are
XP-compatible (verified via mingw cross-compile with the existing
windows-i386 XP toolchain/PE checks).

macOS: temperature reads the SMC directly (AppleSMC user client),
checking known CPU sensor keys across Intel and Apple Silicon
(M1-M5). There is no live-frequency API on macOS at all (Apple
Silicon has none, and hw.cpufrequency was always a fixed nominal
value even on Intel), so clock speed now reports as unavailable
instead of a misleading constant.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PcL8rcwwBeD6W3fZFCRLss
This commit is contained in:
owen
2026-07-21 01:13:33 -05:00
co-authored by Claude Sonnet 5
parent dcc77408c0
commit ec7e75e105
3 changed files with 250 additions and 15 deletions
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Makefile
+6 -5
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@@ -178,20 +178,21 @@ $(DIST)/fossbench-linux-ppc64le: $(DRIVER) $(DRIVER_DEPS) $(ASM_PPC64LE) | $(DIS
@echo "built $@"
$(DIST)/fossbench-macos-arm64: $(DRIVER) $(DRIVER_DEPS) $(ASM_ARM64) | $(DIST)
$(CC_MACOS_ARM64) -arch arm64 $(CFLAGS) $(PTHREAD) $(LDFLAGS) -o $@ $(DRIVER) $(ASM_ARM64) $(LDLIBS)
$(CC_MACOS_ARM64) -arch arm64 $(CFLAGS) $(PTHREAD) $(LDFLAGS) -o $@ $(DRIVER) $(ASM_ARM64) $(LDLIBS) -framework IOKit -framework CoreFoundation
@echo "built $@"
$(DIST)/fossbench-macos-amd64: $(DRIVER) $(DRIVER_DEPS) $(ASM_AMD64) | $(DIST)
MACOSX_DEPLOYMENT_TARGET=$(MACOS_AMD64_MIN) $(CC_MACOS_AMD64) -arch x86_64 -mmacosx-version-min=$(MACOS_AMD64_MIN) $(CFLAGS) $(PTHREAD) $(LDFLAGS) -Wl,-no_fixup_chains -o $@ $(DRIVER) $(ASM_AMD64) $(LDLIBS)
MACOSX_DEPLOYMENT_TARGET=$(MACOS_AMD64_MIN) $(CC_MACOS_AMD64) -arch x86_64 -mmacosx-version-min=$(MACOS_AMD64_MIN) $(CFLAGS) $(PTHREAD) $(LDFLAGS) -Wl,-no_fixup_chains -o $@ $(DRIVER) $(ASM_AMD64) $(LDLIBS) -framework IOKit -framework CoreFoundation
@echo "built $@"
# Windows builds are static and use WinHTTP.
# Windows builds are static and use WinHTTP. Temperature/clock telemetry
# additionally needs WMI (ole32/oleaut32/wbemuuid) and PowrProf.
$(DIST)/fossbench-windows-amd64.exe: $(DRIVER) $(DRIVER_DEPS) $(ASM_AMD64) | $(DIST)
$(CC_WINDOWS_AMD64) $(CFLAGS) $(PTHREAD) -static -o $@ $(DRIVER) $(ASM_AMD64) -lm -lwinhttp -ladvapi32
$(CC_WINDOWS_AMD64) $(CFLAGS) $(PTHREAD) -static -o $@ $(DRIVER) $(ASM_AMD64) -lm -lwinhttp -ladvapi32 -lole32 -loleaut32 -lwbemuuid -lpowrprof
@echo "built $@"
$(DIST)/fossbench-windows-i386.exe: $(DRIVER) $(DRIVER_DEPS) $(SRC_I386) | $(DIST)
$(CC_WINDOWS_I386) -march=i386 $(WINDOWS_I386_XP_CFLAGS) $(CFLAGS) -static $(WINDOWS_I386_XP_LDFLAGS) -o $@ $(DRIVER) $(SRC_I386) -lm -lwinhttp -ladvapi32
$(CC_WINDOWS_I386) -march=i386 $(WINDOWS_I386_XP_CFLAGS) $(CFLAGS) -static $(WINDOWS_I386_XP_LDFLAGS) -o $@ $(DRIVER) $(SRC_I386) -lm -lwinhttp -ladvapi32 -lole32 -loleaut32 -lwbemuuid -lpowrprof
@echo "built $@"
# Add a native rule if one was not already made above.