Monero block height problem on 4 different GPU and on 3 Computers

[vasssek]

Hi,

I've been mining new version on Monero /r. Today at block 1802223 xmrig-nvidia stopped hash calculation as you can see in the attachment. Strange thing is that it happens on 4 different GPUs (P1000, K2200, GTX1070 Ti and GTX1060 at the same block. These cards are running on 3 different computers and there is also running CPU xmrig without any problems.

I use nvidia-xmrig v. 2.14.0.

Please help me to solve this issue.

Thank you

[xmrig]

Bug confirmed.
Thank you.

[xmrig]

It NVRTC compiler bug, only possible solution is use CUDA 10.1, I added build with this CUDA to latest release https://github.com/xmrig/xmrig-nvidia/releases/tag/v2.14.1

Test pool to check this issue:

        {
            "url": "159.65.202.177:3333",
            "user": "x+20000",
            "pass": "x",
            "rig-id": null,
            "nicehash": false,
            "keepalive": false,
            "variant": -1,
            "enabled": true,
            "tls": false,
            "tls-fingerprint": null
        },

It sends fake job every 20 second (time adjustable) starting from block 1802220.

[vasssek]

Thank you, wouldn't be better to add it to the next sw version, e.g. 2.14.2 ?

[xmrig]

https://github.com/xmrig/xmrig-nvidia/releases/tag/v2.14.2

@psychocrypt xmr-stak also affected by this bug.

[psychocrypt]

thanks for the notification. I will use your testpool soon and look if i can reproduce the bug and check if we can workaround the bug

[psychocrypt]

I added a workaround for this bug in xmr-stak fireice-uk/xmr-stak#2390

[xmrig]

https://github.com/xmrig/xmrig-nvidia/releases/tag/v2.14.3

@psychocrypt Thank you, magic volatile did the trick again.

[psychocrypt]

yes volatile avoid optimizations. Normally only r2 must be guarded with volatile but to avoid similar problems in the future I disallow optimizations for all four variables.

[vasssek]

Thank you guys 🥇