Dan Williams wrote:
On 10/24/07, BERTRAND Joël <joel.bertrand@xxxxxxxxxxx> wrote:
Hello,
Any news about this trouble ? Any idea ? I'm trying to fix it, but I
don't see any specific interaction between raid5 and istd. Does anyone
try to reproduce this bug on another arch than sparc64 ? I only use
sparc32 and 64 servers and I cannot test on other archs. Of course, I
have a laptop, but I cannot create a raid5 array on its internal HD to
test this configuration ;-)
Can you collect some oprofile data, as Ming suggested, so we can maybe
see what md_d0_raid5 and istd1 are fighting about? Hopefully it is as
painless to run on sparc as it is on IA:
opcontrol --start --vmlinux=/path/to/vmlinux
<wait>
opcontrol --stop
opreport --image-path=/lib/modules/`uname -r` -l
Done.
Profiling through timer interrupt
samples % image name app name
symbol name
20028038 92.9510 vmlinux-2.6.23 vmlinux-2.6.23 cpu_idle
1198566 5.5626 vmlinux-2.6.23 vmlinux-2.6.23 schedule
41558 0.1929 vmlinux-2.6.23 vmlinux-2.6.23 yield
34791 0.1615 vmlinux-2.6.23 vmlinux-2.6.23 NGmemcpy
18417 0.0855 vmlinux-2.6.23 vmlinux-2.6.23
xor_niagara_5
17430 0.0809 raid456 raid456 (no
symbols)
15837 0.0735 vmlinux-2.6.23 vmlinux-2.6.23
sys_sched_yield
14860 0.0690 iscsi_trgt.ko iscsi_trgt istd
12705 0.0590 nf_conntrack nf_conntrack (no
symbols)
9236 0.0429 libc-2.6.1.so libc-2.6.1.so (no
symbols)
9034 0.0419 vmlinux-2.6.23 vmlinux-2.6.23
xor_niagara_2
6534 0.0303 oprofiled oprofiled (no
symbols)
6149 0.0285 vmlinux-2.6.23 vmlinux-2.6.23
scsi_request_fn
5947 0.0276 ip_tables ip_tables (no
symbols)
4510 0.0209 vmlinux-2.6.23 vmlinux-2.6.23
dma_4v_map_single
3823 0.0177 vmlinux-2.6.23 vmlinux-2.6.23
__make_request
3326 0.0154 vmlinux-2.6.23 vmlinux-2.6.23 tg3_poll
3162 0.0147 iscsi_trgt.ko iscsi_trgt
scsi_cmnd_exec
3091 0.0143 vmlinux-2.6.23 vmlinux-2.6.23
scsi_dispatch_cmd
2849 0.0132 vmlinux-2.6.23 vmlinux-2.6.23
tcp_v4_rcv
2811 0.0130 vmlinux-2.6.23 vmlinux-2.6.23
nf_iterate
2729 0.0127 vmlinux-2.6.23 vmlinux-2.6.23
_spin_lock_bh
2551 0.0118 vmlinux-2.6.23 vmlinux-2.6.23 kfree
2467 0.0114 vmlinux-2.6.23 vmlinux-2.6.23
kmem_cache_free
2314 0.0107 vmlinux-2.6.23 vmlinux-2.6.23
atomic_add
2065 0.0096 vmlinux-2.6.23 vmlinux-2.6.23
NGbzero_loop
1826 0.0085 vmlinux-2.6.23 vmlinux-2.6.23 ip_rcv
1823 0.0085 nf_conntrack_ipv4 nf_conntrack_ipv4 (no
symbols)
1822 0.0085 vmlinux-2.6.23 vmlinux-2.6.23
clear_bit
1767 0.0082 python2.4 python2.4 (no
symbols)
1734 0.0080 vmlinux-2.6.23 vmlinux-2.6.23
atomic_sub_ret
1694 0.0079 vmlinux-2.6.23 vmlinux-2.6.23
tcp_rcv_established
1673 0.0078 vmlinux-2.6.23 vmlinux-2.6.23
tcp_recvmsg
1670 0.0078 vmlinux-2.6.23 vmlinux-2.6.23
netif_receive_skb
1668 0.0077 vmlinux-2.6.23 vmlinux-2.6.23 set_bit
1545 0.0072 vmlinux-2.6.23 vmlinux-2.6.23
__kmalloc_track_caller
1526 0.0071 iptable_nat iptable_nat (no
symbols)
1526 0.0071 vmlinux-2.6.23 vmlinux-2.6.23
kmem_cache_alloc
1373 0.0064 vmlinux-2.6.23 vmlinux-2.6.23
generic_unplug_device
...
Is it enough ?
Regards,
JKB
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