Date: Mon, 10 Sep 2012 14:38:31 +0200 From: Achim Patzner <ap@bnc.net> To: freebsd-current@freebsd.org Subject: mfi driver performance Message-ID: <6A0C3360-0A1E-4905-A33E-D6CC590D7A5A@bnc.net>
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Hi!
We=92re testing a new Intel S2600GL-based server with their recommended =
RAID adapter ("Intel(R) Integrated RAID Module RMS25CB080=94) which is =
identified as
mfi0: <ThunderBolt> port 0x2000-0x20ff mem =
0xd0c60000-0xd0c63fff,0xd0c00000-0xd0c3ffff irq 34 at device 0.0 on pci5
mfi0: Using MSI
mfi0: Megaraid SAS driver Ver 4.23=20
mfi0: MaxCmd =3D 3f0 MaxSgl =3D 46 state =3D b75003f0=20
or
mfi0@pci0:5:0:0: class=3D0x010400 card=3D0x35138086 =
chip=3D0x005b1000 rev=3D0x03 hdr=3D0x00
vendor =3D 'LSI Logic / Symbios Logic'
device =3D 'MegaRAID SAS 2208 [Thunderbolt]'
class =3D mass storage
subclass =3D RAID
and seems to be doing quite well.
As long as it isn=92t used=85
When the system is getting a bit more IO load it is getting close to =
unusable as soon as there are a few writes (independent of =
configuration, it is even sucking as a glorified S-ATA controller). =
Equipping it with an older (unsupported) controller like an SRCSASRB
(mfi0@pci0:10:0:0: class=3D0x010400 card=3D0x100a8086 =
chip=3D0x00601000 rev=3D0x04 hdr=3D0x00
vendor =3D 'LSI Logic / Symbios Logic'
device =3D 'MegaRAID SAS 1078'
class =3D mass storage
subclass =3D RAID) solves the problem but won=92t make Intel=92s =
support happy.
Has anybody similar experiences with the mfi driver? Any good ideas =
besides running an unsupported configuration?
Achim
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