Date: Tue, 09 Feb 2016 14:52:08 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-amd64@FreeBSD.org Subject: [Bug 207022] stat() 4 to 16 times slower on FreeBSD/UFS than on Linux/Ext4 Message-ID: <bug-207022-6-W5gtrkj4Ub@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-207022-6@https.bugs.freebsd.org/bugzilla/> References: <bug-207022-6@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D207022 --- Comment #7 from Fabiano Sidler <fabianosidler@swissonline.ch> --- Following http://www.brendangregg.com/blog/2015-03-10/freebsd-flame-graphs.= html I've done this: dtrace -x stackframes=3D100 -n 'profile-197 /arg0/ { @[stack()] =3D count()= ; }' -c ./cstat -o out.stacks ./stackcollapse.pl out.stacks | ./flamegraph.pl > out.svg uploaded to http://imgh.us/out_4.svg =3D=3D=3D snip out.stacks =3D=3D=3D kernel`cache_lookup+0x21c kernel`namei+0x4d4 kernel`kern_statat_vnhook+0xae kernel`sys_stat+0x2d kernel`amd64_syscall+0x357 kernel`0xffffffff80d30a8b 1 kernel`cache_lookup+0x53f kernel`namei+0x4d4 kernel`kern_statat_vnhook+0xae kernel`sys_stat+0x2d kernel`amd64_syscall+0x357 kernel`0xffffffff80d30a8b 1 kernel`acpi_cpu_c1+0x6 kernel`sched_idletd+0x1d5 kernel`fork_exit+0x9a kernel`0xffffffff80d30cde 14 =3D=3D=3D snap out.stacks =3D=3D=3D I don't see anything helpful in it, but maybe someone else does? --=20 You are receiving this mail because: You are on the CC list for the bug.=
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