Hello John,
> 1. Is the uio_sercos3 driver sharing its interrupt?
> $ cat /proc/interrupts
no, it isn't:
CPU0 CPU1
16: 26948 0 IO-APIC-fasteoi Sercos_III_PCI
17: 794 0 IO-APIC-fasteoi eth1
But I am wondering, why CPU0 gets all the interrupts.
> 2. What are the rt-priorities for your application (including the UIO
> thread) and for the network stack threads?
> $ ps -Alm
The process "geos" is using the uio_sercos3 driver.
F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD
4 - 0 1 0 0 - - - 525 - ? 00:00:00 init
4 S 0 - - 0 80 0 - - poll_s - 00:00:00 -
5 - 0 2 0 0 - - - 0 - ? 00:00:00 kthreadd
5 S 0 - - 0 75 -5 - - kthrea - 00:00:00 -
1 - 0 3 2 0 - - - 0 - ? 00:00:00 migration/0
1 S 0 - - 0 -40 - - - migrat - 00:00:00 -
5 - 0 4 2 0 - - - 0 - ? 00:00:00 sirq-high/0
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 5 2 0 - - - 0 - ? 00:00:00 sirq-timer/0
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 6 2 0 - - - 0 - ? 00:00:00 sirq-net-tx/0
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 7 2 0 - - - 0 - ? 00:00:00 sirq-net-rx/0
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 8 2 0 - - - 0 - ? 00:00:00 sirq-block/0
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 9 2 0 - - - 0 - ? 00:00:00 sirq-tasklet/0
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 10 2 0 - - - 0 - ? 00:00:00 sirq-sched/0
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 11 2 0 - - - 0 - ? 00:00:00 sirq-hrtimer/0
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 12 2 0 - - - 0 - ? 00:00:00 sirq-rcu/0
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
1 - 0 13 2 0 - - - 0 - ? 00:00:00 posixcputmr/0
1 S 0 - - 0 -40 - - - posix_ - 00:00:00 -
5 - 0 14 2 0 - - - 0 - ? 00:00:00 watchdog/0
5 S 0 - - 0 -40 - - - watchd - 00:00:00 -
1 - 0 15 2 0 - - - 0 - ? 00:00:00 desched/0
1 S 0 - - 0 70 -10 - - desche - 00:00:00 -
1 - 0 16 2 0 - - - 0 - ? 00:00:00 migration/1
1 S 0 - - 0 -40 - - - migrat - 00:00:00 -
1 - 0 17 2 0 - - - 0 - ? 00:00:00 posixcputmr/1
1 S 0 - - 0 -40 - - - posix_ - 00:00:00 -
5 - 0 18 2 0 - - - 0 - ? 00:00:00 sirq-high/1
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 19 2 0 - - - 0 - ? 00:00:00 sirq-timer/1
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 20 2 0 - - - 0 - ? 00:00:00 sirq-net-tx/1
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 21 2 0 - - - 0 - ? 00:00:00 sirq-net-rx/1
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 22 2 0 - - - 0 - ? 00:00:00 sirq-block/1
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 23 2 0 - - - 0 - ? 00:00:00 sirq-tasklet/1
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 24 2 0 - - - 0 - ? 00:00:00 sirq-sched/1
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 25 2 0 - - - 0 - ? 00:00:00 sirq-hrtimer/1
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 26 2 0 - - - 0 - ? 00:00:00 sirq-rcu/1
5 S 0 - - 0 10 - - - ksofti - 00:00:00 -
5 - 0 27 2 0 - - - 0 - ? 00:00:00 watchdog/1
5 S 0 - - 0 -40 - - - watchd - 00:00:00 -
1 - 0 28 2 0 - - - 0 - ? 00:00:00 desched/1
1 S 0 - - 0 70 -10 - - desche - 00:00:00 -
1 - 0 29 2 0 - - - 0 - ? 00:00:00 rcu_sched_grace
1 S 0 - - 0 75 -5 - - rcu_sc - 00:00:00 -
1 - 0 30 2 0 - - - 0 - ? 00:00:00 events/0
1 S 0 - - 0 58 - - - worker - 00:00:00 -
1 - 0 31 2 0 - - - 0 - ? 00:00:00 events/1
1 S 0 - - 0 58 - - - worker - 00:00:00 -
1 - 0 32 2 0 - - - 0 - ? 00:00:00 work_on_cpu/0
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 33 2 0 - - - 0 - ? 00:00:00 work_on_cpu/1
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 34 2 0 - - - 0 - ? 00:00:00 cpuset
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 35 2 0 - - - 0 - ? 00:00:00 khelper
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 119 2 0 - - - 0 - ? 00:00:00 kblockd/0
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 120 2 0 - - - 0 - ? 00:00:00 kblockd/1
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 122 2 0 - - - 0 - ? 00:00:00 kacpid
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 123 2 0 - - - 0 - ? 00:00:00 kacpi_notify
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
7 - 0 124 2 0 - - - 0 - ? 00:00:00 IRQ-9
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
1 - 0 232 2 0 - - - 0 - ? 00:00:00 ata/0
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 233 2 0 - - - 0 - ? 00:00:00 ata/1
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 234 2 0 - - - 0 - ? 00:00:00 ata_aux
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 236 2 0 - - - 0 - ? 00:00:00 kseriod
1 S 0 - - 0 75 -5 - - serio_ - 00:00:00 -
1 - 0 291 2 0 - - - 0 - ? 00:00:00 khungtaskd
1 S 0 - - 0 80 0 - - watchd - 00:00:00 -
1 - 0 292 2 0 - - - 0 - ? 00:00:00 pdflush
1 S 0 - - 0 80 0 - - pdflus - 00:00:00 -
1 - 0 293 2 0 - - - 0 - ? 00:00:00 pdflush
1 S 0 - - 0 80 0 - - pdflus - 00:00:00 -
1 - 0 294 2 0 - - - 0 - ? 00:00:00 kswapd0
1 S 0 - - 0 75 -5 - - kswapd - 00:00:00 -
1 - 0 295 2 0 - - - 0 - ? 00:00:00 aio/0
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 296 2 0 - - - 0 - ? 00:00:00 aio/1
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
7 - 0 445 2 0 - - - 0 - ? 00:00:00 IRQ-27
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
1 - 0 446 2 0 - - - 0 - ? 00:00:00 scsi_eh_0
1 S 0 - - 0 75 -5 - - scsi_e - 00:00:00 -
1 - 0 448 2 0 - - - 0 - ? 00:00:00 scsi_eh_1
1 S 0 - - 0 75 -5 - - scsi_e - 00:00:00 -
1 - 0 450 2 0 - - - 0 - ? 00:00:00 scsi_eh_2
1 S 0 - - 0 75 -5 - - scsi_e - 00:00:00 -
1 - 0 452 2 0 - - - 0 - ? 00:00:00 scsi_eh_3
1 S 0 - - 0 75 -5 - - scsi_e - 00:00:00 -
7 - 0 477 2 0 - - - 0 - ? 00:00:00 IRQ-12
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
7 - 0 478 2 0 - - - 0 - ? 00:00:00 IRQ-1
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
7 - 0 485 2 0 - - - 0 - ? 00:00:00 IRQ-8
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
1 - 0 494 2 0 - - - 0 - ? 00:00:00 kjournald
1 S 0 - - 0 75 -5 - - kjourn - 00:00:00 -
5 - 0 593 1 0 - - - 739 - ? 00:00:00 udevd
5 S 0 - - 0 76 -4 - - poll_s - 00:00:00 -
1 - 0 1041 2 0 - - - 0 - ? 00:00:00 kpsmoused
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 1045 2 0 - - - 0 - ? 00:00:00 khpsbpkt
1 S 0 - - 0 75 -5 - - hpsbpk - 00:00:00 -
1 - 0 1055 2 0 - - - 0 - ? 00:00:00 ksuspend_usbd
1 S 0 - - 0 75 -5 - - worker - 00:00:00 -
1 - 0 1057 2 0 - - - 0 - ? 00:00:00 khubd
1 S 0 - - 0 75 -5 - - hub_th - 00:00:00 -
7 - 0 1074 2 0 - - - 0 - ? 00:00:00 IRQ-7
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
7 - 0 1081 2 0 - - - 0 - ? 00:00:00 IRQ-22
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
7 - 0 1133 2 0 - - - 0 - ? 00:00:00 IRQ-18
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
1 - 0 1134 2 0 - - - 0 - ? 00:00:00 knodemgrd_0
1 S 0 - - 0 75 -5 - - nodemg - 00:00:00 -
7 - 0 1162 2 0 - - - 0 - ? 00:00:00 IRQ-14
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
7 - 0 1165 2 0 - - - 0 - ? 00:00:00 IRQ-21
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
7 - 0 1576 2 0 - - - 0 - ? 00:00:00 IRQ-17
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
1 - 0 1629 1 0 - - - 454 - ? 00:00:00 syslogd
1 S 0 - - 0 80 0 - - poll_s - 00:00:00 -
5 - 0 1638 1 0 - - - 441 - ? 00:00:00 klogd
5 S 0 - - 0 80 0 - - syslog - 00:00:00 -
1 - 0 1647 1 0 - - - 441 - ? 00:00:00 acpid
1 S 0 - - 0 80 0 - - poll_s - 00:00:00 -
5 - 105 1661 1 0 - - - 655 - ? 00:00:00 dbus-daemon
5 S 105 - - 0 80 0 - - poll_s - 00:00:00 -
5 - 106 1677 1 0 - - - 721 - ? 00:00:00 avahi-daemon
5 S 106 - - 0 80 0 - - poll_s - 00:00:00 -
1 - 106 1678 1677 0 - - - 721 - ? 00:00:00 avahi-daemon
1 S 106 - - 0 80 0 - - unix_s - 00:00:00 -
5 - 0 1702 1 0 - - - 1354 - ? 00:00:00 sshd
5 S 0 - - 0 80 0 - - poll_s - 00:00:00 -
1 - 0 1714 1 0 - - - 722 - ? 00:00:00 dirmngr
1 S 0 - - 0 80 0 - - poll_s - 00:00:00 -
5 - 100 1986 1 0 - - - 1574 - ? 00:00:00 exim4
5 S 100 - - 0 80 0 - - poll_s - 00:00:00 -
5 - 0 1998 1 0 - - - 488 - ? 00:00:00 inetd
5 S 0 - - 0 80 0 - - poll_s - 00:00:00 -
5 - 103 2015 1 0 - - - 1069 - ? 00:00:00 ntpd
5 S 103 - - 0 80 0 - - poll_s - 00:00:00 -
5 - 107 2027 1 0 - - - 1431 - ? 00:00:00 hald
5 S 107 - - 0 80 0 - - poll_s - 00:00:00 -
0 - 0 2028 2027 0 - - - 831 - ? 00:00:00 hald-runner
0 S 0 - - 0 80 0 - - poll_s - 00:00:00 -
0 - 0 2045 2028 0 - - - 847 - ? 00:00:00 hald-addon-inpu
0 S 0 - - 0 80 0 - - poll_s - 00:00:00 -
7 - 0 2048 2 0 - - - 0 - ? 00:00:00 IRQ-4
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
4 - 107 2055 2028 0 - - - 568 - ? 00:00:00 hald-addon-acpi
4 S 107 - - 0 80 0 - - unix_s - 00:00:00 -
0 - 0 2059 2028 0 - - - 847 - ? 00:00:00 hald-addon-stor
0 S 0 - - 0 80 0 - - poll_s - 00:00:00 -
1 - 1 2067 1 0 - - - 512 - ? 00:00:00 atd
1 S 1 - - 0 80 0 - - hrtime - 00:00:00 -
1 - 0 2087 1 0 - - - 857 - ? 00:00:00 cron
1 S 0 - - 0 80 0 - - hrtime - 00:00:00 -
4 - 0 2104 1 0 - - - 657 - tty1 00:00:00 login
4 S 0 - - 0 80 0 - - wait - 00:00:00 -
4 - 0 2106 1 0 - - - 657 - tty2 00:00:00 login
4 S 0 - - 0 80 0 - - wait - 00:00:00 -
0 - 0 2107 1 0 - - - 441 - tty3 00:00:00 getty
0 S 0 - - 0 80 0 - - n_tty_ - 00:00:00 -
0 - 0 2108 1 0 - - - 441 - tty4 00:00:00 getty
0 S 0 - - 0 80 0 - - n_tty_ - 00:00:00 -
0 - 0 2110 1 0 - - - 441 - tty5 00:00:00 getty
0 S 0 - - 0 80 0 - - n_tty_ - 00:00:00 -
0 - 0 2111 1 0 - - - 441 - tty6 00:00:00 getty
0 S 0 - - 0 80 0 - - n_tty_ - 00:00:00 -
4 - 1000 2149 2104 0 - - - 1544 - tty1 00:00:00 bash
4 S 1000 - - 0 80 0 - - wait - 00:00:00 -
7 - 0 2196 2 0 - - - 0 - ? 00:00:00 IRQ-16
7 S 0 - - 0 9 - - - irqd - 00:00:00 -
0 - 1000 2210 2149 0 - - - 1026 - tty1 00:00:00 screen
0 S 1000 - - 0 80 0 - - pause - 00:00:00 -
1 - 1000 2211 2210 0 - - - 1165 - ? 00:00:00 screen
1 S 1000 - - 0 80 0 - - poll_s - 00:00:00 -
0 - 1000 2212 2211 0 - - - 1514 - pts/0 00:00:00 bash
0 S 1000 - - 0 80 0 - - wait - 00:00:00 -
4 - 0 2229 2212 0 - - - 22379 - pts/0 00:00:00 geos
4 S 0 - - 0 -40 - - - futex_ - 00:00:00 -
5 S 0 - - 0 -30 - - - uio_re - 00:00:00 -
0 - 1000 2231 2211 0 - - - 1514 - pts/1 00:00:00 bash
0 S 1000 - - 0 80 0 - - wait - 00:00:00 -
4 - 0 2251 2231 0 - - - 17916 - pts/1 00:00:00 v263_com
4 S 0 - - 0 80 0 - - hrtime - 00:00:00 -
0 - 1000 2252 2211 0 - - - 1514 - pts/2 00:00:00 bash
0 S 1000 - - 0 80 0 - - wait - 00:00:00 -
4 - 0 2269 2252 0 - - - 24749 - pts/2 00:00:00 v263_sda
4 S 0 - - 0 80 0 - - hrtime - 00:00:00 -
0 - 1000 2270 2211 0 - - - 1514 - pts/3 00:00:00 bash
0 S 1000 - - 0 80 0 - - wait - 00:00:00 -
4 - 0 2287 2270 0 - - - 8518 - pts/3 00:00:00 v263_init
4 S 0 - - 0 80 0 - - hrtime - 00:00:00 -
4 - 1000 2305 2106 0 - - - 1513 - tty2 00:00:00 bash
4 R 1000 - - 0 80 0 - - - - 00:00:00 -
4 - 0 2340 1702 0 - - - 2043 - ? 00:00:00 sshd
4 S 0 - - 0 80 0 - - unix_s - 00:00:00 -
5 - 1000 2342 2340 0 - - - 2081 - ? 00:00:00 sshd
5 S 1000 - - 0 80 0 - - poll_s - 00:00:00 -
0 - 1000 2343 2342 0 - - - 1514 - pts/4 00:00:00 bash
0 S 1000 - - 0 80 0 - - n_tty_ - 00:00:00 -
0 - 1000 2368 2305 0 - - - 872 - tty2 00:00:00 ps
0 R 1000 - - 0 80 0 - - - - 00:00:00 -
> 3. How many interrupts per second (approx.) are being generated by the
> Sercos hardware while your application is running?
> $ cat /proc/interrupts; sleep 1; cat /proc/interrupts
The SERCOS III master runs a cycle time of 2ms, that should be 500 interrupts per second:
CPU0 CPU1
0: 125 0 IO-APIC-edge timer
1: 696 0 IO-APIC-edge i8042
4: 2 0 IO-APIC-edge
7: 1 0 IO-APIC-edge parport0
8: 45 0 IO-APIC-edge rtc0
9: 0 0 IO-APIC-fasteoi acpi
12: 105 0 IO-APIC-edge i8042
14: 0 0 IO-APIC-edge ide0
16: 26948 0 IO-APIC-fasteoi Sercos_III_PCI
17: 794 0 IO-APIC-fasteoi eth1
18: 3 0 IO-APIC-fasteoi ohci1394
21: 0 0 IO-APIC-fasteoi ohci_hcd:usb2
22: 0 0 IO-APIC-fasteoi ehci_hcd:usb1
27: 3698 0 PCI-MSI-edge ahci
NMI: 0 0 Non-maskable interrupts
LOC: 129961 98461 Local timer interrupts
SPU: 0 0 Spurious interrupts
CNT: 0 0 Performance counter interrupts
RES: 169 515 Rescheduling interrupts
CAL: 1465 476 Function call interrupts
TLB: 174 258 TLB shootdowns
TRM: 0 0 Thermal event interrupts
ERR: 1
MIS: 0
CPU0 CPU1
0: 125 0 IO-APIC-edge timer
1: 697 0 IO-APIC-edge i8042
4: 2 0 IO-APIC-edge
7: 1 0 IO-APIC-edge parport0
8: 45 0 IO-APIC-edge rtc0
9: 0 0 IO-APIC-fasteoi acpi
12: 105 0 IO-APIC-edge i8042
14: 0 0 IO-APIC-edge ide0
16: 27448 0 IO-APIC-fasteoi Sercos_III_PCI
17: 794 0 IO-APIC-fasteoi eth1
18: 3 0 IO-APIC-fasteoi ohci1394
21: 0 0 IO-APIC-fasteoi ohci_hcd:usb2
22: 0 0 IO-APIC-fasteoi ehci_hcd:usb1
27: 3712 0 PCI-MSI-edge ahci
NMI: 0 0 Non-maskable interrupts
LOC: 130597 99473 Local timer interrupts
SPU: 0 0 Spurious interrupts
CNT: 0 0 Performance counter interrupts
RES: 171 516 Rescheduling interrupts
CAL: 1465 476 Function call interrupts
TLB: 174 259 TLB shootdowns
TRM: 0 0 Thermal event interrupts
ERR: 1
MIS: 0
> 4. What is the system load while your application is running and when
> the network stops working?
> $ cat /proc/loadavg
The system is idle:
0.01 0.02 0.00 1/114 2374
> 5. Is your application doing anything particular with the network (such
> as tunneling Sercos data)?
No. The only network data are some basic network services and ssh sessions.
If I plug out the network cable, and plug it in again, I get the previously posted error message and the network starts working again.
Best regards, Hans-Peter
--
(°< Hans-Peter Bock, Dipl.-Ing., http://www.isw.uni-stuttgart.de/ >°)
(/) ISW - Universität Stuttgart, Seidenstraße 36, 70174 Stuttgart (\)
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