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Diffstat (limited to 'results/classifier/gemma3:12b/performance/2183')
| -rw-r--r-- | results/classifier/gemma3:12b/performance/2183 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/results/classifier/gemma3:12b/performance/2183 b/results/classifier/gemma3:12b/performance/2183 new file mode 100644 index 000000000..acb77a9a4 --- /dev/null +++ b/results/classifier/gemma3:12b/performance/2183 @@ -0,0 +1,21 @@ + +aarch-64 emulation much slower since release 8.1.5 (issue also present on 8.2.1) +Description of problem: +Since QEMU 8.1.5 our aarch64 based emulation got much slower. We use a linux 5.4 kernel which we cross-compile with the ARM toolchain. Things that are noticable: +- Boot time got a lot longer +- All memory accesses seem to take 3x longer (can be verified by e.g. executing below script, address does not matter): +``` +date +for i in $(seq 0 1000); do + devmem 0x200000000 2>/dev/null +done +date +``` +Steps to reproduce: +Just boot an ARM based kernel on the virt machine and execute above script. +Additional information: +I've tried reproducing the issue on the master branch. There the issue is not present. It only seems to be present on releases 8.1.5 and 8.2.1. + +I've narrowed the problem down to following commit on the 8.2 branch (@bonzini): ef74024b76bf285e247add8538c11cb3c7399a1a accel/tcg: Revert mapping of PCREL translation block to multiple virtual addresses. + +Let me know if any other information / tests are required. |