Hi Jeff,
On 06/23/2010 05:30 PM, Tao Ma wrote:
Hi Jeff,
On 06/23/2010 05:34 AM, Jeff Moyer wrote:
Hi,
Running iozone with the fsync flag, or fs_mark, the performance of CFQ is
far worse than that of deadline for enterprise class storage when dealing
with file sizes of 8MB or less. I used the following command line as a
representative test case:
fs_mark -S 1 -D 10000 -N 100000 -d /mnt/test/fs_mark -s 65536 -t 1 -w
4096 -F
When run using the deadline I/O scheduler, an average of the first 5
numbers
will give you 448.4 files / second. CFQ will yield only 106.7. With
this patch series applied (and the two patches I sent yesterday), CFQ now
achieves 462.5 files / second.
which 2 patches? Could you paste the link or the subject? Just want to
make my test env like yours. ;)
As Joel mentioned in another mail, ocfs2 also use jbd/jbd2, so I'd like
to give it a try and give you some feedback about the test.
I am sorry to say that the patch make jbd2 locked up when I tested
fs_mark using ocfs2.
I have attached the log from my netconsole server. After I reverted the
patch [3/3], the box works again.
Regards,
Tao
BUG: soft lockup - CPU#0 stuck for 61s! [jbd2/sda11-15:5456]
Modules linked in:
ocfs2
jbd2
ocfs2_nodemanager
configfs
ocfs2_stackglue
netconsole
autofs4
hidp
rfcomm
l2cap
crc16
bluetooth
rfkill
sunrpc
ib_iser
rdma_cm
ib_cm
iw_cm
ib_sa
ib_mad
ib_core
ib_addr
ipv6
iscsi_tcp
libiscsi_tcp
libiscsi
scsi_transport_iscsi
dm_mirror
dm_region_hash
dm_log
dm_multipath
dm_mod
video
output
sbs
sbshc
battery
acpi_memhotplug
ac
lp
sg
dcdbas
sr_mod
cdrom
option
usb_wwan
usbserial
serio_raw
rtc_cmos
rtc_core
parport_pc
parport
rtc_lib
snd_hda_codec_analog
tpm_tis
tpm
tpm_bios
button
snd_hda_intel
snd_hda_codec
snd_seq_dummy
snd_seq_oss
snd_seq_midi_event
snd_seq
e1000
tg3
snd_seq_device
libphy
i2c_i801
snd_pcm_oss
snd_mixer_oss
i2c_core
snd_pcm
snd_timer
snd
soundcore
snd_page_alloc
shpchp
pcspkr
ata_piix
libata
sd_mod
scsi_mod
ext3
jbd
ehci_hcd
ohci_hcd
uhci_hcd
[last unloaded: microcode]
CPU 0
Modules linked in:
ocfs2
jbd2
ocfs2_nodemanager
configfs
ocfs2_stackglue
netconsole
autofs4
hidp
rfcomm
l2cap
crc16
bluetooth
rfkill
sunrpc
ib_iser
rdma_cm
ib_cm
iw_cm
ib_sa
ib_mad
ib_core
ib_addr
ipv6
iscsi_tcp
libiscsi_tcp
libiscsi
scsi_transport_iscsi
dm_mirror
dm_region_hash
dm_log
dm_multipath
dm_mod
video
output
sbs
sbshc
battery
acpi_memhotplug
ac
lp
sg
dcdbas
sr_mod
cdrom
option
usb_wwan
usbserial
serio_raw
rtc_cmos
rtc_core
parport_pc
parport
rtc_lib
snd_hda_codec_analog
tpm_tis
tpm
tpm_bios
button
snd_hda_intel
snd_hda_codec
snd_seq_dummy
snd_seq_oss
snd_seq_midi_event
snd_seq
e1000
tg3
snd_seq_device
libphy
i2c_i801
snd_pcm_oss
snd_mixer_oss
i2c_core
snd_pcm
snd_timer
snd
soundcore
snd_page_alloc
shpchp
pcspkr
ata_piix
libata
sd_mod
scsi_mod
ext3
jbd
ehci_hcd
ohci_hcd
uhci_hcd
[last unloaded: microcode]
Pid: 5456, comm: jbd2/sda11-15 Not tainted 2.6.35-rc3+ #4 0MM599/OptiPlex 745
RIP: 0010:[<ffffffff822fcfe7>]
[<ffffffff822fcfe7>] _raw_spin_lock+0xe/0x15
RSP: 0018:ffff88012780de78 EFLAGS: 00000297
RAX: 0000000000001d1c RBX: ffff88012fbb4000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88012fbd9650 RDI: ffff88012fbb4024
RBP: ffffffff820031ce R08: ffff88012780c000 R09: 0000000000000000
R10: ffff88012fbd8fa8 R11: 0000000000000000 R12: ffff88013a545880
R13: ffffffff8202d2b5 R14: 0000000000000000 R15: ffff880001e13640
FS: 0000000000000000(0000) GS:ffff880001e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 0000000127853000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process jbd2/sda11-15 (pid: 5456, threadinfo ffff88012780c000, task ffff88012fbd8f60)
Stack:
ffffffffa027b955
0000000000000000
ffff88012fbd8f60
ffffffff8204de27
ffff88012780de98
ffff88012780de98
ffff88012fbfbae8
0000000000000292
ffff88012780def8
ffff88012fbb4000
ffff88012fbfbae0
ffffffffa027b7fa
Call Trace:
[<ffffffffa027b955>] ? kjournald2+0x15b/0x1cf [jbd2]
[<ffffffff8204de27>] ? autoremove_wake_function+0x0/0x2e
[<ffffffffa027b7fa>] ? kjournald2+0x0/0x1cf [jbd2]
[<ffffffff8204db33>] ? kthread+0x79/0x81
[<ffffffff82003614>] ? kernel_thread_helper+0x4/0x10
[<ffffffff8204daba>] ? kthread+0x0/0x81
[<ffffffff82003610>] ? kernel_thread_helper+0x0/0x10
Code:
e0
8d
90
00
01
00
00
75
05
3e
66
0f
b1
17
0f
94
c2
0f
b6
c2
85
c0
0f
95
c0
0f
b6
c0
c3
b8
00
01
00
00
3e
66
0f
c1
07
38
e0
74
06
f3>
90
8a
07
eb
f6
c3
9c
58
fa
ba
00
01
00
00
3e
66
0f
c1
17
38
Call Trace:
[<ffffffffa027b955>] ? kjournald2+0x15b/0x1cf [jbd2]
[<ffffffff8204de27>] ? autoremove_wake_function+0x0/0x2e
[<ffffffffa027b7fa>] ? kjournald2+0x0/0x1cf [jbd2]
[<ffffffff8204db33>] ? kthread+0x79/0x81
[<ffffffff82003614>] ? kernel_thread_helper+0x4/0x10
[<ffffffff8204daba>] ? kthread+0x0/0x81
[<ffffffff82003610>] ? kernel_thread_helper+0x0/0x10
