iav Posted Thursday at 11:29 PM Posted Thursday at 11:29 PM After updating the edge kernel to 6.17, and then to 6.18-rc, the performance of my ODroid-N2 dropped drastically. Here are the performance test results of 7zip with different kernel versions for comparison I compile the kernel myself using the armbian build system and install the resulting .deb. '7z b' 7-Zip 23.01 (arm64) : Copyright (c) 1999-2023 Igor Pavlov : 2023-06-20 64-bit arm_v:8 locale=en_GB.UTF-8 Threads:6 OPEN_MAX:1024 Compiler: 13.2.0 GCC 13.2.0 Linux : 6.16.6-edge-meson64 : #1 SMP PREEMPT Tue Sep 9 17:02:41 UTC 2025 : aarch64 PageSize:4KB THP:always hwcap:8FF:CRC32:SHA1:SHA2:AES:ASIMD LE 1T CPU Freq (MHz): 1901 1897 1904 1904 1904 1904 1903 3T CPU Freq (MHz): 298% 1894 298% 1892 RAM size: 3769 MB, # CPU hardware threads: 6 RAM usage: 1334 MB, # Benchmark threads: 6 Compressing | Decompressing Dict Speed Usage R/U Rating | Speed Usage R/U Rating KiB/s % MIPS MIPS | KiB/s % MIPS MIPS 22: 7244 525 1343 7048 | 136762 553 2109 11660 23: 6896 533 1317 7026 | 128222 535 2071 11092 24: 6626 539 1323 7124 | 114197 478 2096 10021 25: 6170 542 1301 7045 | 121553 536 2020 10818 ---------------------------------- | ------------------------------ Avr: 6734 535 1321 7061 | 125184 526 2074 10898 Tot: 530 1698 8979 ------------------------------------------------------------------------------------------------- 7-Zip 23.01 (arm64) : Copyright (c) 1999-2023 Igor Pavlov : 2023-06-20 64-bit arm_v:8 locale=en_GB.UTF-8 Threads:6 OPEN_MAX:1024 Compiler: 13.2.0 GCC 13.2.0 Linux : 6.18.0-rc7-edge-meson64 : #1 SMP PREEMPT Sun Nov 23 22:53:16 UTC 2025 : aarch64 PageSize:4KB THP:always hwcap:8FF:CRC32:SHA1:SHA2:AES:ASIMD LE 1T CPU Freq (MHz): 1966 1985 1732 1940 1979 1946 1486 3T CPU Freq (MHz): 64% 424 97% 641 RAM size: 3773 MB, # CPU hardware threads: 6 RAM usage: 1334 MB, # Benchmark threads: 6 Compressing | Decompressing Dict Speed Usage R/U Rating | Speed Usage R/U Rating KiB/s % MIPS MIPS | KiB/s % MIPS MIPS 22: 1045 85 1191 1018 | 20252 91 1903 1727 23: 1078 90 1218 1099 | 18815 86 1889 1628 24: 1100 93 1274 1183 | 19644 92 1880 1724 25: 914 78 1332 1044 | 19697 94 1873 1753 ---------------------------------- | ------------------------------ Avr: 1034 87 1253 1086 | 19602 91 1886 1708 Tot: 89 1570 1397 I have done similar tests on ODroid-M1 (rockchip), but nothing similar happens there. What could be the reason? 0 Quote
usual user Posted Friday at 09:57 AM Posted Friday at 09:57 AM 10 hours ago, iav said: What could be the reason? Is see no significant differences: ******************************************************************************** ssd-006 Hardkernel ODROID-N2Plus CPU 0-1: performance 1000 MHz - 2016 MHz CPU 2-5: performance 1000 MHz - 2400 MHz GPU: performance 124 MHz - 799 MHz 6.16.0-0.rc1.17.fc43.aarch64 #1 SMP PREEMPT_DYNAMIC Sat Jun 14 11:19:02 CEST 2025 ******************************************************************************** 7z b 7-Zip 24.09 (arm64) : Copyright (c) 1999-2024 Igor Pavlov : 2024-11-29 64-bit arm_v:8-A locale=en_US.UTF-8 Threads:6 OPEN_MAX:1024 Compiler: ver:15.2.1 20250924 (Red Hat 15.2.1-2) GCC 15.2.1 : UNALIGNED Linux : 6.16.0-0.rc1.17.fc43.aarch64 : #1 SMP PREEMPT_DYNAMIC Sat Jun 14 11:19:02 CEST 2025 : aarch64 PageSize:4KB THP:madvise hwcap:8FF:CRC32:SHA1:SHA2:AES:ASIMD arm64 1T CPU Freq (MHz): 2092 2387 2384 2390 2361 2389 2388 3T CPU Freq (MHz): 282% 2239 296% 2352.. 6T CPU Freq (MHz): 538% 2040 497% 1893.. RAM size: 3740 MB, # CPU hardware threads: 6 RAM usage: 1334 MB, # Benchmark threads: 6 Compressing | Decompressing Dict Speed Usage R/U Rating | Speed Usage R/U Rating KiB/s % MIPS MIPS | KiB/s % MIPS MIPS 22: 7107 508 1362 6914 | 141426 488 2473 12058 23: 6459 494 1332 6581 | 136949 489 2421 11847 24: 6268 508 1327 6740 | 132118 485 2390 11593 25: 5695 515 1264 6503 | 127085 483 2343 11310 ---------------------------------- | ------------------------------ Avr: 6382 506 1321 6684 | 134394 486 2407 11702 Tot: 496 1864 9193 ******************************************************************************** ssd-006 Hardkernel ODROID-N2Plus CPU 0-1: performance 1000 MHz - 2016 MHz CPU 2-5: performance 1000 MHz - 2400 MHz GPU: performance 124 MHz - 799 MHz 6.18.0-0.rc3.30.fc44.aarch64 #1 SMP PREEMPT_DYNAMIC Mon Oct 27 21:17:35 CET 2025 ******************************************************************************** 7z b 7-Zip 24.09 (arm64) : Copyright (c) 1999-2024 Igor Pavlov : 2024-11-29 64-bit arm_v:8-A locale=en_US.UTF-8 Threads:6 OPEN_MAX:1024 Compiler: ver:15.2.1 20250924 (Red Hat 15.2.1-2) GCC 15.2.1 : UNALIGNED Linux : 6.18.0-0.rc3.30.fc44.aarch64 : #1 SMP PREEMPT_DYNAMIC Mon Oct 27 21:17:35 CET 2025 : aarch64 PageSize:4KB THP:madvise hwcap:8FF:CRC32:SHA1:SHA2:AES:ASIMD arm64 1T CPU Freq (MHz): 2365 2380 2383 2390 2389 2391 2388 3T CPU Freq (MHz): 277% 2162 274% 2095.. 6T CPU Freq (MHz): 533% 2021 508% 1926.. RAM size: 3737 MB, # CPU hardware threads: 6 RAM usage: 1334 MB, # Benchmark threads: 6 Compressing | Decompressing Dict Speed Usage R/U Rating | Speed Usage R/U Rating KiB/s % MIPS MIPS | KiB/s % MIPS MIPS 22: 6924 491 1373 6737 | 136783 473 2465 11662 23: 6586 495 1356 6711 | 141391 506 2418 12232 24: 6240 494 1359 6709 | 138310 510 2382 12137 25: 5912 507 1330 6750 | 127792 487 2337 11373 ---------------------------------- | ------------------------------ Avr: 6415 497 1355 6727 | 136069 494 2401 11851 Tot: 495 1878 9289 0 Quote
iav Posted Friday at 06:22 PM Author Posted Friday at 06:22 PM Seems you are using redhat kernel. it means something wrong changed in armbian meson64 kernel config after 6.16.?? 0 Quote
iav Posted 16 hours ago Author Posted 16 hours ago I did a bisect. 3381d25b77fbf1ebaaa151a9f2be66fbf1ca3a1e is the first bad commit commit 3381d25b77fbf1ebaaa151a9f2be66fbf1ca3a1e Author: Ricardo Pardini <ricardo@pardini.net> Date: Sun Oct 12 19:57:32 2025 +0200 I try to build 6.18 kernel with config file linux-meson64-edge.config taken from "good" 6.17 kernel. but result was a "slow" kernel. Before I hope to find "bad" change in kernel config, now it's clear problem not there. I have no more ideas 😢 0 Quote
Werner Posted 9 hours ago Posted 9 hours ago 6 hours ago, iav said: 3381d25b77fbf1ebaaa151a9f2be66fbf1ca3a1e This is part of https://github.com/armbian/build/pull/8777/files And there are no changes at our end. So I assume the issue was introduced in mainline? 0 Quote
c0rnelius Posted 34 minutes ago Posted 34 minutes ago I haven't personally had issue with 6.17.y, but 6.18.y is a mess on meson-g12. It is basically unusable in my opinion. PCIe is hosed, even the patch that kind of fixes the issue just makes the error go away and doesn't fix the underlining problem "performance". I also get topology errors, but as I haven't really seen anyone yet complain about that, I'm assuming its me. For my personal use, I will be sticking with 6.12.y until things get sorted. 0 Quote
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