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+id = 1606
+title = "riscv: fence.i is not functional"
+state = "opened"
+created_at = "2023-04-17T17:03:39.906Z"
+closed_at = "n/a"
+labels = ["target: riscv"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/1606"
+host-os = "Ubuntu 22.04.2 LTS"
+host-arch = "x86"
+qemu-version = "7.2.94 (v8.0.0-rc4)"
+guest-os = "Ubuntu 22.04.2 LTS"
+guest-arch = "RISC-V (riscv64-softmmu)"
+description = """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)."""
+reproduce = """1. echo 2 > /proc/sys/vm/nr_hugepages
+2. ./CoRF+fence.i"""
+additional = """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=
+```"""