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Author: Admin | 2025-04-28
UPDATE: I'll be cleaning up the comments as it turned out to be an issue specific to OpenCL in overall, not just an issue with the particular OS or hardware. The OP has been revised.UPDATE 2: I've since moved all the mining operations to a new dedicated Windows rig. I cannot confirm if this issue is still there on Linux, though it's very likely (as there are still some new issues ), as I'm currently dealing with DAG epoch transition issues on Windows side as well, but the phenomena are different.This issue has been revised to keep mainly Linux-related part around, while I move Windows-related stuffs to the new one.Describe the bugIt seems with OpenCL platforms ethminer has issues with DAG epoch transition. When the next DAG epoch begins, mining will be significantly degraded or even halted, and a reboot of system/ethminer is required.The issue doesn't appear to affect CUDA platforms. I have a Windows 10 based rig using a nVidia card and it's still mining properly even after transitioning to the next DAG epoch.To ReproduceSteps to reproduce the behavior:Start ethminer with AMD GPUs (using OpenCL).Keep mining until next DAG epoch.When the next DAG epoch begins, the miner will rebuild the DAG buffer.After rebuilding the DAG buffer, the mining operation will be significantly disrupted.Expected behaviorThe video cards should be able to keep mining with a stable hashrate.Screenshots (Optional)Log 1: m 18:36:59 ethminer 42:54 A785:R3 49.53 Mh - cl0 49.53 i 18:36:59 ethminer Job: b2674480… eth-asia1.nanopool.org [103.3.62.64:9999] i 18:37:02 ethminer Job: de8d1fdc… eth-asia1.nanopool.org [103.3.62.64:9999] m 18:37:04 ethminer 42:54 A785:R3 49.53 Mh - cl0 49.53 i 18:37:05 ethminer Epoch : 368 Difficulty : 10.00 Gh i 18:37:05 ethminer Job: 6d059b2f… eth-asia1.nanopool.org [103.3.62.64:9999] i 18:37:10 ethminer Job: ec202bf2… eth-asia1.nanopool.org [103.3.62.64:9999] m 18:37:10 ethminer 42:54 A785:R3 49.50 Mh - cl0 49.50 i 18:37:10 ethminer Job: 3edc19b8… eth-asia1.nanopool.org [103.3.62.64:9999]cl 18:37:10 cl-0 Generating split DAG + Light (total): 3.87 GBcl 18:37:10 cl-0 OpenCL kernel i 18:37:11 ethminer Job: dbbc3995… eth-asia1.nanopool.org [103.3.62.64:9999]cl 18:37:11 cl-0 Loading binary kernel /usr/bin/kernels/ethash_gfx1010_lws128_exit.bin X 18:37:11 cl-0 Failed to load binary kernel: /usr/bin/kernels/ethash_gfx1010_lws128_exit.bin X 18:37:11 cl-0 Falling back to OpenCL kernel...cl 18:37:11 cl-0 Creating DAG buffer, size: 3.87 GB, free: 4.11 GBcl 18:37:12 cl-0 Creating light cache buffer, size: 62.00 MBcl 18:37:12 cl-0 Loading kernelscl 18:37:12 cl-0 Creating buffer for header.cl 18:37:12 cl-0 Creating mining buffer i 18:37:14 ethminer Job: 75f428b6… eth-asia1.nanopool.org [103.3.62.64:9999] m 18:37:15 ethminer 42:54 A785:R3 49.50 Mh - cl0 49.50 i 18:37:17 ethminer Job: 890145c3… eth-asia1.nanopool.org [103.3.62.64:9999]cl 18:37:20 cl-0 3.87 GB of DAG data generated in 9,512 ms. m 18:37:20 ethminer 42:54 A785:R3 24.67 Mh - cl0 24.67 i 18:37:22 ethminer Job: 2bb7c5f0… eth-asia1.nanopool.org [103.3.62.64:9999] i 18:37:25 ethminer Job: 942e76b3… eth-asia1.nanopool.org [103.3.62.64:9999] m 18:37:25 ethminer 42:55 A785:R3 3.19 Mh - cl0 3.19 i 18:37:28 ethminer Job: 0f5a6f3f… eth-asia1.nanopool.org [103.3.62.64:9999] m 18:37:30 ethminer 42:55 A785:R3 3.19 Mh - cl0 3.19 i 18:37:31 ethminer Job: 5c6e4c99… eth-asia1.nanopool.org [103.3.62.64:9999] i 18:37:34 ethminer Job: aeaf72b2… eth-asia1.nanopool.org [103.3.62.64:9999] m 18:37:35 ethminer 42:55 A785:R3 3.19 Mh - cl0 3.19 i 18:37:36 ethminer Job: 94a07e25… eth-asia1.nanopool.org [103.3.62.64:9999]
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