Comments (8)
saleyn
commented on August 30, 2024
1
Please check the master branch now.
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saleyn
commented on August 30, 2024
1
BTW, this is how you can check the meaning of a status code:
1> exec:status(132).
{signal,sigill,true}from erlexec.
Zabrane
commented on August 30, 2024
@saleyn same error when using the latest erlexec from master.
Exit code 132=128 + 4.
SIGILL=4 signal is about Illegal instruction: the program contained some machine code the CPU can't understand.
If I try to run the failing erlexec command using os:cmd, they all go perfectly without any error.
# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.4 LTS
Release: 22.04
Codename: jammy
# dmesg -T | grep opcode
[Tue Apr 9 13:03:44 2024] traps: exec-port[19214] trap invalid opcode ip:5595beec6446 sp:7ffc773eb600 error:0 in exec-port[5595beebf000+22000]
[Tue Apr 9 13:03:45 2024] traps: exec-port[19215] trap invalid opcode ip:56380fb13446 sp:7ffda1300c60 error:0 in exec-port[56380fb0c000+22000]
[Tue Apr 9 13:03:45 2024] traps: exec-port[19250] trap invalid opcode ip:55c5862ed446 sp:7ffed779f4c0 error:0 in exec-port[55c5862e6000+22000]
[Tue Apr 9 13:03:45 2024] traps: exec-port[19251] trap invalid opcode ip:5575d1129446 sp:7ffca453a680 error:0 in exec-port[5575d1122000+22000]
[Tue Apr 9 13:03:46 2024] traps: exec-port[19257] trap invalid opcode ip:5618a1e6c446 sp:7fff001fa900 error:0 in exec-port[5618a1e65000+22000]
[Tue Apr 9 13:03:46 2024] traps: exec-port[19262] trap invalid opcode ip:55cf26e09446 sp:7fffcf58da40 error:0 in exec-port[55cf26e02000+22000]
[Tue Apr 9 13:05:21 2024] traps: exec-port[20144] trap invalid opcode ip:564cd448a446 sp:7ffc7bb1df80 error:0 in exec-port[564cd4483000+22000]
[Tue Apr 9 13:05:21 2024] traps: exec-port[20163] trap invalid opcode ip:559a8398f446 sp:7ffca74f5be0 error:0 in exec-port[559a83988000+22000]
[Tue Apr 9 13:12:19 2024] traps: exec-port[20165] trap invalid opcode ip:564f0228f446 sp:7ffd9dc36c60 error:0 in exec-port[564f02288000+22000]
[Tue Apr 9 13:12:29 2024] traps: exec-port[20439] trap invalid opcode ip:5621ecce9446 sp:7fff27454e20 error:0 in exec-port[5621ecce2000+22000]
[Tue Apr 9 13:12:37 2024] traps: exec-port[20441] trap invalid opcode ip:55b5c22a9446 sp:7ffd4be08900 error:0 in exec-port[55b5c22a2000+22000]
[Tue Apr 9 13:12:42 2024] traps: exec-port[20443] trap invalid opcode ip:5556451be446 sp:7ffce9cfbb00 error:0 in exec-port[5556451b7000+22000]
[Tue Apr 9 13:37:33 2024] traps: exec-port[21109] trap invalid opcode ip:5571ac457446 sp:7fffc6569880 error:0 in exec-port[5571ac450000+22000]
[Tue Apr 9 13:37:33 2024] traps: exec-port[21110] trap invalid opcode ip:561a15fa6446 sp:7ffc2f1e4e40 error:0 in exec-port[561a15f9f000+22000]
[Tue Apr 9 13:37:33 2024] traps: exec-port[21129] trap invalid opcode ip:55d409242446 sp:7ffcffdf2ee0 error:0 in exec-port[55d40923b000+22000]
[Tue Apr 9 13:37:34 2024] traps: exec-port[21149] trap invalid opcode ip:560a5a16b446 sp:7ffc108eb9c0 error:0 in exec-port[560a5a164000+22000]
[Tue Apr 9 13:37:34 2024] traps: exec-port[21150] trap invalid opcode ip:55675b655446 sp:7fff89c52280 error:0 in exec-port[55675b64e000+22000]
[Tue Apr 9 13:37:34 2024] traps: exec-port[21155] trap invalid opcode ip:5636961ed446 sp:7ffc1632bc20 error:0 in exec-port[5636961e6000+22000]
[Tue Apr 9 13:38:39 2024] traps: exec-port[21589] trap invalid opcode ip:565462efd446 sp:7ffd8247b0a0 error:0 in exec-port[565462ef6000+22000]
[Tue Apr 9 13:38:40 2024] traps: exec-port[21608] trap invalid opcode ip:55ed9fe4d446 sp:7fffbc44d180 error:0 in exec-port[55ed9fe46000+22000]
[Tue Apr 9 13:46:58 2024] traps: exec-port[22196] trap invalid opcode ip:562811cc9446 sp:7ffeac45abc0 error:0 in exec-port[562811cc2000+22000]
[Tue Apr 9 13:46:59 2024] traps: exec-port[22215] trap invalid opcode ip:56122d506446 sp:7ffc34d853e0 error:0 in exec-port[56122d4ff000+22000]
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Zabrane
commented on August 30, 2024
@saleyn We found the issue:
https://github.com/saleyn/erlexec/blob/master/c_src/Makefile#L72-L77
You've added AVX/AVX2 compilation flags, and our target Docker machine doesn't support them.
After recompiling erlexec without these flags, it worked.
Question: why these AVX/AVX2 flags ? Do you really need SIMD instructions inside erlexec?
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saleyn
commented on August 30, 2024
This was an optimization to vectorize loops. I can take it out for compatibility.
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Zabrane
commented on August 30, 2024
BTW, this is how you can check the meaning of a status code:
1> exec:status(132). {signal,sigill,true}
Forget that one, thanks.
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Zabrane
commented on August 30, 2024
This was an optimization to vectorize loops. I can take it out for compatibility.
Yes please, take it off. We heavily rely on erlexec for many years.
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Zabrane
commented on August 30, 2024
Please check the master branch now.
Working as expected now. Many thanks.
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