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Since commit 4a9db89 xmrig crashes instantly on Core2 6600 (and possibly other CPUs without SSE4.1) #1853

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BugerDread opened this issue Sep 26, 2020 · 7 comments · Fixed by #1856
Closed

Since commit 4a9db89 xmrig crashes instantly on Core2 6600 (and possibly other CPUs without SSE4.1) #1853

BugerDread opened this issue Sep 26, 2020 · 7 comments · Fixed by #1856
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bug kawpow randomx
Milestone
v6

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@BugerDread
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BugerDread commented Sep 26, 2020 •
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Describe the bug
Since commit 4a9db89 xmrig crashes instantly on all my rigs.
Im using quite old CPUs (Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz according to /proc/cpuinfo) to mine kawpow on AMD GPUs (opencl). I was asked to try the dev branch to check that #1836 was fixed, but the xmrig crashed instantly as launched with:

$ ./xmrig 
Illegal instruction (core dumped)

Then I went trough trial and error over previos commits to find out which one starts to cause this, and I found its "4a9db89527dfac4e0c66892190fd3d642408d459 - RandomX: added SSE4.1-optimized Blake2b".

Xmrig build from previous commits starts normally so it seems that SSE4.1 optimisation is breaking xmrig for older CPUs (without SSE4.1 support, such as mentioned Core2 6600).

I found a way how to buid later commits to be able to mine kawpow over opencl on my old CPUs:

  • remove all "-msse4.1" occurrences from cmake/flags.cmake
  • add "-DWITH_RANDOMX=OFF" to the cmake command (eg. cmake .. -DWITH_RANDOMX=OFF -DXMRIG_DEPS=scripts/deps)

To Reproduce
Run xmrig build from source after commit 4a9db89 on Core2 6600 (which lacks SSE4.1) and try to launch it.

Expected behaviour
Xmrig should detect older CPUs and run on them as before 4a9db89 (at least to be able to mine algos which does not require SSE4.1)

Required data

  • Miner log as text or screenshot
$ ./xmrig 
Illegal instruction (core dumped)
  • Config file or command line (without wallets)
config independent, crashes even without config in the same way
  • OS: [e.g. Windows]
Ubuntu 18.04.5 LTS
4GB RAM + 2GB swap
Linux m04 5.4.0-48-lowlatency #52~18.04.1-Ubuntu SMP PREEMPT Thu Sep 10 13:34:23 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
amdgpu-pro 20.10-1048554
@xmrig xmrig added this to the v6 milestone Sep 27, 2020
@xmrig xmrig linked a pull request Sep 27, 2020 that will close this issue
Fixed SSE4.1 for old CPUs #1856
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@xmrig
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xmrig commented Sep 27, 2020

Fixed in dev branch.
Thank you.

@SChernykh
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Can you also test that RandomX still works on this CPU in the dev branch?

@BugerDread
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Fixed in dev branch.
Thank you.

Yes, now I can run xmrig compiled from dev branch on my old CPUs to mine kawpow on AMD GPUs.

Can you also test that RandomX still works on this CPU in the dev branch?

Of course. Unfortunately it seems that I cant mine RandomX (Monero) on my old CPUs with latest dev - xmrig crashes:

$ ./xmrig --donate-level 5 -o randomxmonero.eu.nicehash.com:3380 -u WALLET-REMOVED.m04 -p x -k --nicehash --coin monero
 * ABOUT        XMRig/6.3.5-dev gcc/7.5.0
 * LIBS         libuv/1.38.1 OpenSSL/1.1.1g hwloc/2.2.0
 * HUGE PAGES   supported
 * 1GB PAGES    unavailable
 * CPU          Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz (1) x64 -AES
                L2:4.0 MB L3:0.0 MB 2C/2T NUMA:1
 * MEMORY       1.4/3.8 GB (36%)
 * DONATE       5%
 * ASSEMBLY     auto:none
 * POOL #1      randomxmonero.eu.nicehash.com:3380 coin monero
 * COMMANDS     hashrate, pause, resume, results, connection
 * OPENCL       disabled
 * CUDA         disabled
[2020-09-27 11:05:35.626]  net      use pool randomxmonero.eu.nicehash.com:3380  172.65.200.133
[2020-09-27 11:05:35.626]  net      new job from randomxmonero.eu.nicehash.com:3380 diff 167804 algo rx/0 height 2195712
[2020-09-27 11:05:35.627]  cpu      use argon2 implementation SSSE3
[2020-09-27 11:05:36.227]  randomx  init dataset algo rx/0 (2 threads) seed 03ff5130b4c62713...
[2020-09-27 11:05:36.227]  randomx  allocated 2336 MB (2080+256) huge pages 0% 0/1168 +JIT (0 ms)
Aborted (core dumped)

... but I can mine RandomX with the same config using older xmrig on this CPU:

$ ./xmrig --donate-level 5 -o randomxmonero.eu.nicehash.com:3380 -u WALLET-REMOVED.m04 -p x -k --nicehash --coin monero
 * ABOUT        XMRig/6.3.2 gcc/7.4.0
 * LIBS         libuv/1.38.1 OpenSSL/1.1.1g hwloc/2.2.0
 * HUGE PAGES   supported
 * 1GB PAGES    unavailable
 * CPU          Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz (1) x64 -AES
                L2:4.0 MB L3:0.0 MB 2C/2T NUMA:1
 * MEMORY       1.4/3.8 GB (36%)
 * DONATE       5%
 * ASSEMBLY     auto:none
 * POOL #1      randomxmonero.eu.nicehash.com:3380 coin monero
 * COMMANDS     hashrate, pause, resume, results, connection
 * OPENCL       disabled
 * CUDA         disabled
[2020-09-27 11:09:17.207]  net      use pool randomxmonero.eu.nicehash.com:3380  172.65.200.133
[2020-09-27 11:09:17.207]  net      new job from randomxmonero.eu.nicehash.com:3380 diff 167804 algo rx/0 height 2195714
[2020-09-27 11:09:17.207]  cpu      use argon2 implementation SSSE3
[2020-09-27 11:09:17.207]  randomx  init dataset algo rx/0 (2 threads) seed 03ff5130b4c62713...
[2020-09-27 11:09:17.208]  randomx  allocated 2336 MB (2080+256) huge pages 0% 0/1168 +JIT (1 ms)
[2020-09-27 11:09:42.227]  randomx  dataset ready (25020 ms)
[2020-09-27 11:09:42.228]  cpu      use profile  rx  (2 threads) scratchpad 2048 KB
[2020-09-27 11:09:42.249]  cpu      READY threads 2/2 (2) huge pages 0% 0/2 memory 4096 KB (21 ms)
[2020-09-27 11:09:56.566]  net      new job from randomxmonero.eu.nicehash.com:3380 diff 167804 algo rx/0 height 2195714
[2020-09-27 11:09:59.812]  net      new job from randomxmonero.eu.nicehash.com:3380 diff 167804 algo rx/0 height 2195714
|    CPU # | AFFINITY | 10s H/s | 60s H/s | 15m H/s |
|        0 |        0 |   83.82 |     n/a |     n/a |
|        1 |        1 |   83.50 |     n/a |     n/a |
|        - |        - |   167.3 |     n/a |     n/a |
[2020-09-27 11:10:10.028]  miner    speed 10s/60s/15m 167.3 n/a n/a H/s max 169.3 H/s

@SChernykh
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Unfortunately it seems that I cant mine RandomX (Monero) on my old CPUs with latest dev - xmrig crashes

Can you try again with the latest dev?

@BugerDread
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BugerDread commented Sep 27, 2020 •
edited
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Of course - yes, it works with latest dev (dfab81e):

$ ./xmrig --donate-level 5 -o randomxmonero.eu.nicehash.com:3380 -u wallet.m04 -p x -k --nicehash --coin monero
 * ABOUT        XMRig/6.3.5-dev gcc/7.5.0
 * LIBS         libuv/1.38.1 OpenSSL/1.1.1g hwloc/2.2.0
 * HUGE PAGES   supported
 * 1GB PAGES    unavailable
 * CPU          Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz (1) x64 -AES
                L2:4.0 MB L3:0.0 MB 2C/2T NUMA:1
 * MEMORY       1.4/3.8 GB (36%)
 * DONATE       5%
 * ASSEMBLY     auto:none
 * POOL #1      randomxmonero.eu.nicehash.com:3380 coin monero
 * COMMANDS     hashrate, pause, resume, results, connection
 * OPENCL       disabled
 * CUDA         disabled
[2020-09-27 12:31:57.754]  net      use pool randomxmonero.eu.nicehash.com:3380  172.65.200.133
[2020-09-27 12:31:57.754]  net      new job from randomxmonero.eu.nicehash.com:3380 diff 167804 algo rx/0 height 2195753
[2020-09-27 12:31:57.754]  cpu      use argon2 implementation SSSE3
[2020-09-27 12:31:58.354]  randomx  init dataset algo rx/0 (2 threads) seed 03ff5130b4c62713...
[2020-09-27 12:31:58.354]  randomx  allocated 2336 MB (2080+256) huge pages 0% 0/1168 +JIT (0 ms)
[2020-09-27 12:32:16.546]  net      new job from randomxmonero.eu.nicehash.com:3380 diff 167804 algo rx/0 height 2195754
[2020-09-27 12:32:19.953]  net      new job from randomxmonero.eu.nicehash.com:3380 diff 167804 algo rx/0 height 2195755
[2020-09-27 12:32:23.438]  randomx  dataset ready (25084 ms)
[2020-09-27 12:32:23.438]  cpu      use profile  rx  (2 threads) scratchpad 2048 KB
[2020-09-27 12:32:23.460]  cpu      READY threads 2/2 (2) huge pages 0% 0/2 memory 4096 KB (22 ms)
[2020-09-27 12:32:43.891]  net      new job from randomxmonero.eu.nicehash.com:3380 diff 167804 algo rx/0 height 2195755
|    CPU # | AFFINITY | 10s H/s | 60s H/s | 15m H/s |
|        0 |        0 |   100.8 |     n/a |     n/a |
|        1 |        1 |   100.7 |     n/a |     n/a |
|        - |        - |   201.5 |     n/a |     n/a |
[2020-09-27 12:32:47.930]  miner    speed 10s/60s/15m 201.5 n/a n/a H/s max 201.5 H/s

Im happy to help to make xmrig better.

@JohnnyKetch
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I confirm, with the dev branch my e4600 now works. Thank you <3

@xmrig
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xmrig commented Oct 3, 2020

https://github.com/xmrig/xmrig/releases/tag/v6.3.5

@xmrig xmrig closed this as completed Oct 3, 2020
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Fixed SSE4.1 for old CPUs
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@SChernykh @BugerDread @xmrig @JohnnyKetch