Re: sched: problem with paging request on linux 3.16

You could also try the test by inserting the needed modules manually, 
using "insmod ???/rtai_sched.ko kernel_latency= 3000 user_latency=3000", 
so to avoid the calibration.
Paolo

On 05/08/2017 12:59 PM, PAUL-SOFTWARE wrote:
>
> Hello Paolo,
>
> Using the calibration data from the running system doesn’t help.
>
> I have tried RTAI from CVS and the new released RTAI 5.0 without success.
>
> Even when I use the same kernel settings you have posted a few days 
> ago, the kernel ops with the second hardware still exists.
>
> The hal patch I use is identically to the one that was in VULCANO CVS.
>
> But the patch was removed. Do you know why?
>
> Unfortunately I can’t use a newer kernel: The Igh Ethercat Master has 
> only patched diver for network interfaces up to kernel 3.16.
>
> Josef
>
> *Von:*Paolo Mantegazza [mailto:[email protected]]
> *Gesendet:* Mittwoch, 3. Mai 2017 14:57
> *An:* PAUL-SOFTWARE; [email protected]
> *Betreff:* Re: [Rtai] sched: problem with paging request on linux 3.16
>
> Have you configured your kernel for a UP setup?
> The latency calibration failed. you can try copying the file 
> RTAIINSTALLDIR/calibration/latencies that succeeded in the new 
> installation and see what happens.
> Moreover, I do not think that the patch you use is distributed with 
> the test version you are using. Try with one in test2 tarball.
> All in all we are about to release the final 5.0, which is what is in 
> VULCANO CVS. TRy it too.
> Paolo.
>
>
> On 05/03/2017 01:53 PM, PAUL-SOFTWARE wrote:
>
>     Hello,
>
>     I installed rtai-5.0-test2 on Debian Jessie with 32Bit kernel
>     3.16.7, using the hal-patch from magma
>     (hal-linux-3.16.7-x86-5x.patch
>     <https://github.com/ShabbyX/RTAI/blob/master/base/arch/x86/patches/hal-linux-3.16.7-x86-5x.patch>).
>
>     Everything works fine on a board with Intel i3-4130 CPU.
>
>     On a system with Intel i3-6110 CPU I get an error when I insert
>     rtai_sched.ko.
>
>     This is the kernel log when I start testsuite/kernel/latency:
>
>     I-pipe: head domain RTAI registered.
>
>     RTAI[hal]: mounted. ISOL_CPUS_MASK: 0.
>
>     SYSINFO - # CPUs: 1, TIMER NAME: 'lapic', TIMER IRQ: 2305, TIMER
>     FREQ: 99758000, CLOCK NAME: 'tsc', CLOCK FREQ: 3192285000, CPU
>     FREQ: 3192285000, LINUX TIMER IRQ: 2305.
>
>     RTAI[malloc]: global heap size = 2097152 bytes, <BSD>.
>
>     , kstacks pool size = 524288 bytes.
>
>     RTAI[sched]: hard timer type/freq = lapic/99758000(Hz); timing:
>     oneshot; linear timed lists.
>
>     RTAI[sched]: Linux timer freq = 250 (Hz), TimeBase freq =
>     3192285000 hz.
>
>     RTAI[sched]: timer setup = 64 ns, resched latency = 0 ns.
>
>     RTAI[usi]: enabled.
>
>     BUG: unable to handle kernel paging request at bfebea1c
>
>     IP: [<f86e2845>] rtai_lxrt_invoke+0xae5/0x13c0 [rtai_sched]
>
>     *pde = 108de067 *pte = 10c15067
>
>     Oops: 0001 [#1] PREEMPT
>
>     Modules linked in: rtai_sched(O+) rtai_hal(O) i915 drm_kms_helper
>     drm i2c_algo_bit cfg80211 rfkill nfsd auth_rpcgss oid_registry
>     nfs_acl nfs lockd fscache sunrpc snd_hda_codec_hdmi coretemp
>     snd_hda_codec_realtek snd_hda_codec_generic kvm snd_hda_intel
>     snd_hda_controller snd_hda_codec crc32_pclmul snd_hwdep
>     aesni_intel snd_pcsp aes_i586 xts snd_pcm snd_timer lrw gf128mul
>     snd soundcore ablk_helper cryptd mxm_wmi battery evdev serio_raw
>     tpm_tis tpm shpchp wmi video button fuse parport_pc ppdev lp
>     parport autofs4 ext4 crc16 mbcache jbd2 hid_generic usbhid sg
>     sd_mod crc_t10dif crct10dif_generic crct10dif_common crc32c_intel
>     ahci libahci xhci_hcd r8169 8139cp mii libata scsi_mod usbcore
>     usb_common fan thermal_sys i2c_hid hid i2c_core
>
>     CPU: 0 PID: 1346 Comm: calibrate Tainted: G           O  3.16-rtai #8
>
>     Hardware name: System manufacturer System Product Name/H110M-C,
>     BIOS 3402 04/06/2017
>
>     task: d08dc010 ti: d08f8000 task.ti: d08f8000
>
>     EIP: 0060:[<f86e2845>] EFLAGS: 00010206 CPU: 0
>
>     EIP is at rtai_lxrt_invoke+0xae5/0x13c0 [rtai_sched]
>
>     EAX: 0040780c EBX: 00000000 ECX: 00000407 EDX: bfebea1c
>
>     ESI: bfebea1c EDI: 0040780c EBP: d08f9f84 ESP: d08f9f34
>
>     DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
>
>     CR0: 8005003b CR2: bfebea1c CR3: 108dd000 CR4: 00340790
>
>     I-pipe domain Linux
>
>     Stack:
>
>     d08f9f58 c10863ee c15e4180 c1087745 d08f9f98 c15e4240 d08f9f98
>     00000001
>
>     fffffffe d08f9f64 c108789c 00000000 d08f9fac c1145b90 d08f9f98
>     ed94bc40
>
>     e19b3ac0 d08f9fb4 bfebe978 b74f6848 d08f9fa4 f86e09dd 00000000
>     bfebff48
>
>     Call Trace:
>
>     [<c10863ee>] ? rcu_is_watching+0x1e/0x40
>
>     [<c1087745>] ? __call_rcu.constprop.60+0xa5/0x1e0
>
>     [<c108789c>] ? call_rcu+0x1c/0x20
>
>     [<c1145b90>] ? SyS_access+0x190/0x1f0
>
>     [<f86e09dd>] ? lxrt_intercept_syscall+0x8d/0x190 [rtai_sched]
>
>     [<c10bdcd4>] ? __ipipe_notify_syscall+0x14/0x30
>
>     [<c1468115>] ? pipeline_sysenter+0x7/0x1e
>
>     Code: 10 8b 56 0c 89 54 24 0c 8b 56 08 89 54 24 08 8b 56 04 89 54
>     24 04 8b 16 89 14 24 ff 50 04 89 44 24 2c 89 54 24 30 e9 37 f6 ff
>     ff <8b> 1a 8d 81 18 fc ff ff 83 f8 20 89 da 0f 87 97 05 00 00 ff 24
>
>     EIP: [<f86e2845>] rtai_lxrt_invoke+0xae5/0x13c0 [rtai_sched]
>     SS:ESP 0068:d08f9f34
>
>     CR2: 00000000bfebea1c
>
>     ---[ end trace 426b8ee3f3f6e396 ]---
>
>     USERMODE CHECK: ERROR.
>
>     USERMODE CHECK PROVIDED (ns): KernelLatency 0, UserLatency 0.
>
>     FINAL CALIBRATION SUMMARY (ns): KernelLatency 1, UserLatency 1.
>
>     Has anybody an idea what causes this ops and how I can avoid it?
>
>     Best regards,
>
>     Josef
>
>
>
>
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