diff options
Diffstat (limited to 'results/classifier/accel-gemma3:12b/vmm/1783422')
| -rw-r--r-- | results/classifier/accel-gemma3:12b/vmm/1783422 | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/vmm/1783422 b/results/classifier/accel-gemma3:12b/vmm/1783422 new file mode 100644 index 000000000..8d2d75d54 --- /dev/null +++ b/results/classifier/accel-gemma3:12b/vmm/1783422 @@ -0,0 +1,30 @@ + +qemu_clock_get_ns does not take into account icount_time_shift + +Hello, + +If you check the qemu/util/qemu-timer.c you will find the following function: + +597: int64_t qemu_clock_get_ns(QEMUClockType type) +598: { +.... +602: switch (type) { +.... +606: case QEMU_CLOCK_VIRTUAL: +607: if (use_icount) { +608: return cpu_get_icount(); + + +Now on line 606, in case we requested QEMU_CLOCK_VIRTUAL, and we are using icount, the value of cpu_get_icount(); will be returned. + +However if I understand correctly, in order to convert icount to ns, you must use take into account the icount shift -- as defined in the documentation: "The virtual cpu will execute one instruction every 2^N ns of virtual time.". + +Therefor, the correct value to return would be cpu_icount_to_ns(cpu_get_icount()), where cpu_icount_to_ns is defined in cpus.c: + +296: int64_t cpu_icount_to_ns(int64_t icount) +297: { +298: return icount << icount_time_shift; +299: } + +Best Regards, +Humberto "SilverOne" Carvalho \ No newline at end of file |