Hi
> If there are no performance counters, OProfile can still use the system
> timer to take samples each clock tick. This is the way I am using it.
Thanks for the info.
> To use it in this manner you have to hack up the code a bit so that the
> return value of oprofile_arch_init() (in oprofile/common.c) is -ENODEV.
I'll try that and let you know the results.
I want to use the profiler, because the network performance of dbau1200
is very poor (with 2.6.14-rc2 and smc91x driver I get around 12Mbit/s!).
I check the traffic of netperf with ethereal and I see quite a lot
of duplicated packets (see the attached file with a few packets).
I think think this is also the reason that NFS is so slow.
BR,
Matej
No. Time Source Destination Protocol Info
50 5.759336 172.18.1.53 172.18.1.57 TCP 37994 > 32772 [ACK] Seq=28961 Ack=1 Win=5840 Len=1448 TSV=111254184 TSER=2217426
51 5.759342 172.18.1.53 172.18.1.57 TCP 37994 > 32772 [ACK] Seq=30409 Ack=1 Win=5840 Len=1448 TSV=111254184 TSER=2217426
52 5.761884 172.18.1.57 172.18.1.53 TCP [TCP Dup ACK 49#1] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217427 TSER=111254176 SLE=17377 SRE=18825
53 5.761894 172.18.1.53 172.18.1.57 TCP 37994 > 32772 [ACK] Seq=31857 Ack=1 Win=5840 Len=1448 TSV=111254186 TSER=2217427
54 5.762052 172.18.1.57 172.18.1.53 TCP [TCP Dup ACK 49#2] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217429 TSER=111254176 SLE=17377 SRE=20273
55 5.762063 172.18.1.53 172.18.1.57 TCP [TCP Retransmission] 37994 > 32772 [ACK] Seq=14481 Ack=1 Win=5840 Len=1448 TSV=111254186 TSER=2217429
56 5.762214 172.18.1.57 172.18.1.53 TCP [TCP Dup ACK 49#3] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217429 TSER=111254176 SLE=17377 SRE=21721
57 5.762223 172.18.1.53 172.18.1.57 TCP [TCP Retransmission] 37994 > 32772 [ACK] Seq=15929 Ack=1 Win=5840 Len=1448 TSV=111254187 TSER=2217429
58 5.764745 172.18.1.57 172.18.1.53 TCP [TCP Dup ACK 49#4] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217432 TSER=111254176 SLE=17377 SRE=23169
59 5.764754 172.18.1.53 172.18.1.57 TCP 37994 > 32772 [ACK] Seq=33305 Ack=1 Win=5840 Len=1448 TSV=111254189 TSER=2217432
60 5.764911 172.18.1.57 172.18.1.53 TCP [TCP Dup ACK 49#5] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217432 TSER=111254176 SLE=26065 SRE=27513 SLE=17377 SRE=23169
61 5.765074 172.18.1.57 172.18.1.53 TCP [TCP Dup ACK 49#6] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217432 TSER=111254176 SLE=26065 SRE=28961 SLE=17377 SRE=23169
62 5.765083 172.18.1.53 172.18.1.57 TCP [TCP Retransmission] 37994 > 32772 [PSH, ACK] Seq=23169 Ack=1 Win=5840 Len=1448 TSV=111254189 TSER=2217432
63 5.766842 172.18.1.57 172.18.1.53 TCP [TCP Dup ACK 49#7] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217434 TSER=111254176 SLE=26065 SRE=30409 SLE=17377 SRE=23169
