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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:07 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:17 +0200 |
| commit | 9260319e7411ff8281700a532caa436f40120ec4 (patch) | |
| tree | 2f6bfe5f3458dd49d328d3a9eb508595450adec0 /gitlab/issues_text/target_riscv/host_missing/accel_missing/1606 | |
| parent | 225caa38269323af1bfc2daadff5ec8bd930747f (diff) | |
| download | qemu-analysis-9260319e7411ff8281700a532caa436f40120ec4.tar.gz qemu-analysis-9260319e7411ff8281700a532caa436f40120ec4.zip | |
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Diffstat (limited to 'gitlab/issues_text/target_riscv/host_missing/accel_missing/1606')
| -rw-r--r-- | gitlab/issues_text/target_riscv/host_missing/accel_missing/1606 | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/gitlab/issues_text/target_riscv/host_missing/accel_missing/1606 b/gitlab/issues_text/target_riscv/host_missing/accel_missing/1606 new file mode 100644 index 000000000..9cd0bd254 --- /dev/null +++ b/gitlab/issues_text/target_riscv/host_missing/accel_missing/1606 @@ -0,0 +1,29 @@ +riscv: fence.i is not functional +Description of problem: +The attached user-level test is designed to do the following (in iteration): + + - Thread P0 on CPU0 changes some text/code, while + + - Thread P1 on CPU1 checks/reads the code, fence.i, then executes the same code. + +Results (in stdout) indicates that CPU1 has read the new code (1:x5=a009) but executed the old one (1:x7=1) (against the specification). +Steps to reproduce: +1. echo 2 > /proc/sys/vm/nr_hugepages +2. ./CoRF+fence.i +Additional information: +Example output: +```[CoRF+fence.i.c](/uploads/c150ca0910783cc4bfc3886789b64c28/CoRF+fence.i.c) +Test CoRF+fence.i Allowed +Histogram (4 states) +25784 :>1:x5=0xa009; 1:x7=2; +24207 *>1:x5=0xa009; 1:x7=1; <-- THIS LINE +8 :>1:x5=0xa019; 1:x7=1; +1 :>1:x5=0xa019; 1:x7=2; +Ok +Witnesses +Positive: 24207 Negative 25793 +Condition exists (1:x5=0xa009 /\ 1:x7=1) is validated +Observation CoRF+fence.i Sometimes 24207 25793 +Time CoRF+fence.i 0.85 +Hash= +``` |