Date: Fri, 29 May 2009 13:49:54 +0200 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-stable@freebsd.org Subject: Re: ZFS on top of GELI / Intel Atom 330 system Message-ID: <gvoi4r$3m0$1@ger.gmane.org> In-Reply-To: <20090529112919.GA74359@dmr.ath.cx> References: <cf9b1ee00905290119w5eea0bfmd018d1c1282ac310@mail.gmail.com> <4A1FAB45.4040904@h3q.com> <cf9b1ee00905290312j2d1aeda8y3e4d8f4b1a0492f5@mail.gmail.com> <4A1FBD4A.5080204@pp.dyndns.biz> <20090529112919.GA74359@dmr.ath.cx>
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[-- Attachment #1 --] Emil Mikulic wrote: > On Fri, May 29, 2009 at 12:47:38PM +0200, Morgan Wesstr?m wrote: >> You can benchmark the encryption subsytem only, like this: >> >> # kldload geom_zero >> # geli onetime -s 4096 -l 256 gzero >> # sysctl kern.geom.zero.clear=0 >> # dd if=/dev/gzero.eli of=/dev/null bs=1M count=512 > > I don't mean to take this off-topic wrt -stable but just > for fun, I built a -current kernel with dtrace and did: > > geli onetime gzero > ./hotkernel & > dd if=/dev/zero of=/dev/gzero.eli bs=1m count=1024 > killall dtrace > geli detach gzero > > The hot spots: > [snip stuff under 0.3%] > kernel`g_eli_crypto_run 50 0.3% > kernel`_mtx_assert 56 0.3% > kernel`SHA256_Final 58 0.3% > kernel`rijndael_encrypt 72 0.4% > kernel`_mtx_unlock_flags 74 0.4% > kernel`rijndael128_encrypt 74 0.4% > kernel`copyout 92 0.5% > kernel`_mtx_lock_flags 93 0.5% > kernel`bzero 114 0.6% > kernel`spinlock_exit 240 1.3% > kernel`bcopy 325 1.7% > kernel`sched_idletd 810 4.3% > kernel`swcr_process 1126 6.0% > kernel`SHA256_Transform 1178 6.3% > kernel`rijndaelEncrypt 5574 29.7% > kernel`acpi_cpu_c1 8383 44.6% Hi, What is the meaning of counts? Number of calls made or time? [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkofy+kACgkQldnAQVacBcgmgQCgwoO5tGeizD9d6jdWhfl6bU49 q/sAoO00YuoF2se3kR53EXGVwyJiuvuS =tT97 -----END PGP SIGNATURE-----
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