Date: Mon, 06 Jan 2003 14:28:52 +0100 From: Poul-Henning Kamp <phk@freebsd.org> To: current@freebsd.org Subject: HOWTO: Basic-block profiling on -current. Message-ID: <18868.1041859732@critter.freebsd.dk>
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I have committed the bits needed to use GCC's basicblock profiling on -current. Make sure to recompile the kernbb(8) program first. Here's an simple example how to profile a single file (vfs_bio.c): cd /sys/i386/conf config YOURKERNEL cd ../compile/YOURKERNEL make depend && make all rm vfs_bio.o make vfs_bio.o DEBUG="--test-coverage --profile-arcs" make all && make install reboot # run your test. kernbb cd /sys/i386/compile/YOURKERNEL gcov vfs_bio.c # examine vfs_bio.c.gcov If you want to profile multiple files, you just give them all the same treatment as vfs_bio. It's perfectly possible to profile the entire kernel if you want to. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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