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Improve flamegraph-related make scripts.

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4lDO2 2026-08-30 19:53:26 +02:00
parent ba65121ff3
commit 6f5aae29b3
1 changed files with 25 additions and 8 deletions
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33
Makefile
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@ -139,18 +139,35 @@ wireshark: FORCE
wireshark $(BUILD)/network.pcap
KPROF_KERNEL_BINARY?=recipes/core/profiling-kernel/target/$(TARGET)/build/kernel
KPROF_KERNEL_SYM?=build/flamegraph/$(TARGET)-kernel-syms.txt
KPROF_OUTPUT_TXT?=build/$(ARCH)/$(CONFIG_NAME)/filesystem/home/root/kprof.txt
KPROF_PERF_SVG?=build/flamegraph/$(TARGET)-$(CONFIG_NAME)-kflamegraph.svg
KPROF_KERNEL_SYM?=$(BUILD)/flamegraph/kernel-syms.txt
KPROF_OUTPUT_TXT?=$(BUILD)/filesystem/home/root/kprof.txt
KPROF_PERF_SVG?=$(BUILD)/flamegraph/kflamegraph.svg
KPROF_PROCESSED_OUTPUT?=$(BUILD)/flamegraph/processed.txt
KPROF_COLLAPSED_OUTPUT?=$(BUILD)/flamegraph/collapsed.txt
# XXX: This assumes the TSC is invariant, that the value for cpu0 is the same as for all other CPUs, and that the value from ACPI actually reflects the TSC rate. It also only works on Linux.
KPROF_CPU_GHZ?=$(shell (cat /sys/devices/system/cpu/cpu0/acpi_cppc/nominal_freq || echo 3400) | xargs echo "0.001 *" | bc)
# See https://gitlab.redox-os.org/redox-os/kprofiling/-/blob/master/src/main.rs?ref_type=heads#L16-L18
# Set e.g. to "xo" to show individual instruction offsets
KPROF_OPTIONS?=_
KPROF_OPTIONS?=u
# for example, set --reverse to get a reverse flamegraph
KPROF_FLAMEGRAPH_OPTIONS?=
.PHONY: flamegraph rotate-flamegraph differential-flamegraph
rotate-flamegraph:
mkdir -p "$(BUILD)"
rm -rf "$(BUILD)/flamegraph.old"
mv "$(BUILD)/flamegraph" "$(BUILD)/flamegraph.old" || true
flamegraph:
mkdir -p build/flamegraph && \
make mount && \
nm -CS $(KPROF_KERNEL_BINARY) >$(KPROF_KERNEL_SYM) && \
redox-kprofiling $(KPROF_OUTPUT_TXT) $(KPROF_KERNEL_SYM) $(KPROF_OPTIONS) $(KPROF_CPU_GHZ) | inferno-collapse-perf | inferno-flamegraph > $(KPROF_PERF_SVG) && \
mkdir -p $(BUILD)/flamegraph
make unmount
make mount
nm -CS $(KPROF_KERNEL_BINARY) >$(KPROF_KERNEL_SYM)
redox-kprofiling $(KPROF_OUTPUT_TXT) $(KPROF_KERNEL_SYM) $(KPROF_OPTIONS) $(KPROF_CPU_GHZ) >$(KPROF_PROCESSED_OUTPUT)
inferno-collapse-perf <$(KPROF_PROCESSED_OUTPUT) >$(KPROF_COLLAPSED_OUTPUT)
inferno-flamegraph $(KPROF_FLAMEGRAPH_OPTIONS) <$(KPROF_COLLAPSED_OUTPUT) >$(KPROF_PERF_SVG)
differential-flamegraph:
inferno-diff-folded $(BUILD)/flamegraph/collapsed.txt $(BUILD)/flamegraph.old/collapsed.txt >$(BUILD)/flamegraph/differential.txt
inferno-flamegraph $(KPROF_FLAMEGRAPH_OPTIONS) <$(BUILD)/flamegraph/differential.txt >$(BUILD)/flamegraph/differential.svg