cron / gpu memory discussion

sgrayban

@IKS how do I get a cron to run ? In your demo it rebooted every 4 hours and wonder how you did that.

Habimm

Why would you want to use cron? In Android, you can just write an app and have it do something periodically.

IKS

There is no cron in Android. Since have the full control of the system, we can add such tasks on many levels (kernel, android handler notifications, sleep functions, system deamons and more).

What you need for your application is JobScheduler: https://developer.android.com/topic/performance/scheduling

sgrayban

Thanks @IKS but I went with a easier solution. Since I enabled ssh on the first day I just use a cron on my debian desktop and scheduled a reboot every 4 hours...

0 0,4,8,12,16,20 * * * ssh root@192.168.0.25 reboot #reboot PIDroid every 4 hours

IKS

@sgrayban, may I ask why you need to reboot your Pi every 4 hours?

sgrayban

System hangs if it runs for long time. I haven't been able to figure out why.

IKS

That shouldn't happen. Which OS version are you using? Do you still have a SSH access after it freezes?

sgrayban

Not sure of the version but when it freezes it locks everything. No ssh or a ping.

IKS

You can check the version in Settings -> Emteria.
Do you have any application running all the time?

sgrayban

I have a few running in the background but Fully Browser Kiosk is running 24/7

sgrayban

I'm not at the location the PI is so I can't see it.

IKS

One of our business clients is running Fully Kiosk 24/7 for several months now without any issues. If it is a problem with our OS, we would be happy to fix it.

If you have SSH access to it, could you please run "getprop"?

sgrayban

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IKS

You are running the latest version 0.6.0. The only freeze reason I was aware of was the leak of the GPU memory, but that should be fixed since 0.5.X. Just to make sure this problem didn't came back, we could monitor the memory state:

cat /d/dri/0/bo_stats

Run this command shortly after reboot and one more time 3 hours later. Do you know the frequency of freezes, if you don't reboot it? It would be great to see the memory state shortly before it happens.

sgrayban

It's random... sometimes just a few minutes, 30 minutes or hours later.

Is there a way to tail a log and keep a running window open so I can capture it at failure time ?

sgrayban

current stats are.........

rpi3:/ # cat /d/dri/0/bo_stats
                        kernel:   5120kb BOs (1)
                    V3D shader:    320kb BOs (80)
                        binner:  16384kb BOs (1)
                      resource:  13864kb BOs (64)
          resource 65536x1@8/0:    448kb BOs (7)
scanout resource 1152x864@32/0:   7776kb BOs (2)
                    mesa cache:   5012kb BOs (18)
        resource 1048576x1@8/0:   4096kb BOs (4)
        resource 1152x864@32/0:  34992kb BOs (9)
         resource 576x576@32/0:   1296kb BOs (1)
         resource 131072x1@8/0:    512kb BOs (4)
            resource 128x1@8/7:     32kb BOs (4)
        resource 1024x512@8/10:   2052kb BOs (3)
             resource 1x1@32/0:    148kb BOs (12)
           resource 81x81@32/6:    240kb BOs (4)
           resource 128x20@8/7:      8kb BOs (1)
            resource 96x20@8/6:      8kb BOs (1)
            resource 80x18@8/6:      8kb BOs (1)
            resource 64x20@8/6:      8kb BOs (1)
            resource 64x18@8/6:      8kb BOs (1)
           resource 112x14@8/6:      8kb BOs (1)
            resource 80x14@8/6:      8kb BOs (1)
            resource 64x12@8/6:     16kb BOs (2)
            resource 48x14@8/5:      8kb BOs (1)
           resource 27x27@32/4:     32kb BOs (4)
            resource 14x20@8/4:     16kb BOs (2)
           resource 20x19@32/4:      8kb BOs (1)
           resource 21x19@32/4:      8kb BOs (1)
           resource 19x19@32/4:      8kb BOs (1)
        resource 1280x864@32/0:   4320kb BOs (1)
         resource 1152x54@32/0:    864kb BOs (3)
         resource 1152x27@32/0:    432kb BOs (3)
        resource 1152x810@32/0:   3648kb BOs (1)
         resource 162x162@32/7:    464kb BOs (2)
       resource 1152x896@32/10:  13528kb BOs (2)
        tiling shadow 1152x864:   3888kb BOs (1)
            userspace BO cache:   5012kb BOs (18)

IKS

Well, if I added it all up correctly, there is almost 117 MB allocated (plus 10 MB of cache). Since Raspberry Pi only has 256 MB in total, it should be OK for now.

I am not aware of a ready-to-use tail command for such cases, but you could run something like

while true; do cat /d/dri/0/bo_stats; sleep 10; done

IKS

Just tested it - works 🙂 But a newline would be great:

while true; do cat /d/dri/0/bo_stats; echo ""; sleep 10; done

sgrayban

I'm surprised that android doesn't have a syslog.

sgrayban

I modified it

while true; do cat /d/dri/0/bo_stats;echo "##############NEW STATS###########";echo ""; sleep 10; done