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John Crispin
b95b0928ac
Set BUILD_TIME_LOG=<file> to record a begin and an end event for every prepare, configure, compile and install stage of every tool, toolchain component, kernel and package. scripts/build-time-report.pl turns the log into a report. The report divides each second of the build between the stages that run in it, so the numbers show which stages hold up the wall clock rather than which ones burn the most CPU. Nothing is recorded and no extra process runs when BUILD_TIME_LOG is unset. Signed-off-by: John Crispin <john@phrozen.org>
19 lines
368 B
Bash
Executable File
19 lines
368 B
Bash
Executable File
#!/bin/sh
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#
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# SPDX-License-Identifier: GPL-2.0-only
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#
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# Records one build stage event. See scripts/build-time-report.pl.
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#
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# Usage: build-time-log.sh <logfile> <begin|end> <stage> <name>
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[ $# -eq 4 ] || exit 0
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now=$(date +%s.%N 2>/dev/null)
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case "$now" in
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''|*N*) now=$(date +%s) ;;
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esac
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printf '%s\t%s\t%s\t%s\n' "$now" "$2" "$3" "$4" >> "$1" 2>/dev/null
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exit 0
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