1 files changed, 91 insertions, 0 deletions
diff --git a/results/classifier/105/graphic/1783422 b/results/classifier/105/graphic/1783422
new file mode 100644
index 00000000..aeca82d3
--- /dev/null
+++ b/results/classifier/105/graphic/1783422
@@ -0,0 +1,91 @@
+graphic: 0.771
+device: 0.760
+boot: 0.747
+network: 0.743
+other: 0.729
+mistranslation: 0.675
+vnc: 0.644
+assembly: 0.633
+instruction: 0.631
+semantic: 0.624
+KVM: 0.615
+socket: 0.606
+
+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
+
+Actually implementing this fix causes a linux boot to crash. So there may be something more to this. I will investigate more. 
+
+[  892.294463] BUG: soft lockup - CPU#0 stuck for 347s! [swapper/0:1]
+[  892.490416] Modules linked in:
+[  892.635725] 
+[  892.790816] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.16.0-6-armmp-lpae #1 Debian 3.16.56-1+deb8u1
+[  893.098786] task: ee059640 ti: ee05a000 task.ti: ee05a000
+[  893.322395] PC is at vprintk_emit+0x2c8/0x650
+[  893.525852] LR is at console_unlock+0x234/0x4dc
+[  893.749395] pc : [<c00bdd18>]    lr : [<c00bd7a8>]    psr: 60000153
+[  893.749395] sp : ee05bdc8  ip : ee05bd70  fp : ee05be2c
+[  894.117789] r10: 00000001  r9 : 00000000  r8 : 00000006
+[  894.329454] r7 : 00000000  r6 : 00000028  r5 : c0a3dd98  r4 : c0a3dd98
+[  894.571266] r3 : c09b44cc  r2 : 60000153  r1 : 60000153  r0 : c0a3dd98
+[  894.807621] Flags: nZCv  IRQs on  FIQs off  Mode SVC_32  ISA ARM  Segment kernel
+[  895.089213] Control: 30c7387d  Table: 40003000  DAC: fffffffd
+[  895.329468] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.16.0-6-armmp-lpae #1 Debian 3.16.56-1+deb8u1
+[  895.720505] [<c002cf60>] (unwind_backtrace) from [<c002764c>] (show_stack+0x20/0x24)
+[  896.065798] [<c002764c>] (show_stack) from [<c05ed770>] (dump_stack+0x9c/0xb0)
+[  896.393691] [<c05ed770>] (dump_stack) from [<c0024370>] (show_regs+0x30/0x34)
+[  896.713637] [<c0024370>] (show_regs) from [<c0103084>] (watchdog_timer_fn+0x18c/0x1e4)
+[  897.062977] [<c0103084>] (watchdog_timer_fn) from [<c008d9c0>] (__run_hrtimer+0x88/0x2a8)
+[  897.412317] [<c008d9c0>] (__run_hrtimer) from [<c008ecf0>] (hrtimer_run_queues+0xc0/0x1a4)
+[  897.785790] [<c008ecf0>] (hrtimer_run_queues) from [<c0076ef0>] (update_process_times+0x3c/0x70)
+[  898.169815] [<c0076ef0>] (update_process_times) from [<c00d5ed4>] (tick_periodic+0x4c/0xcc)
+[  898.532622] [<c00d5ed4>] (tick_periodic) from [<c00d61b0>] (tick_handle_periodic+0x94/0x98)
+[  898.895806] [<c00d61b0>] (tick_handle_periodic) from [<c04ad8fc>] (arch_timer_handler_virt+0x38/0x40)
+[  899.292479] [<c04ad8fc>] (arch_timer_handler_virt) from [<c00c3b48>] (handle_percpu_devid_irq+0x80/0x194)
+[  899.702210] [<c00c3b48>] (handle_percpu_devid_irq) from [<c00bf738>] (generic_handle_irq+0x3c/0x4c)
+[  900.082647] [<c00bf738>] (generic_handle_irq) from [<c0023ba4>] (handle_IRQ+0x50/0xa0)
+[  900.427431] [<c0023ba4>] (handle_IRQ) from [<c0008948>] (gic_handle_irq+0x3c/0x70)
+[  900.767678] [<c0008948>] (gic_handle_irq) from [<c05f4180>] (__irq_svc+0x40/0x54)
+[  901.037948] Exception stack(0xee05bd80 to 0xee05bdc8)
+[  901.317607] bd80: c0a3dd98 60000153 60000153 c09b44cc c0a3dd98 c0a3dd98 00000028 00000000
+[  901.677252] bda0: 00000006 00000000 00000001 ee05be2c ee05bd70 ee05bdc8 c00bd7a8 c00bdd18
+[  901.970690] bdc0: 60000153 ffffffff
+[  902.218760] [<c05f4180>] (__irq_svc) from [<c00bdd18>] (vprintk_emit+0x2c8/0x650)
+[  902.571360] [<c00bdd18>] (vprintk_emit) from [<c05eaeb8>] (printk+0x44/0x4c)
+[  902.916079] [<c05eaeb8>] (printk) from [<c00d14c0>] (__clocksource_select+0x12c/0x170)
+[  903.290503] [<c00d14c0>] (__clocksource_select) from [<c08da7d4>] (clocksource_done_booting+0x38/0x4c)
+[  903.671545] [<c08da7d4>] (clocksource_done_booting) from [<c0008d14>] (do_one_initcall+0xf0/0x234)
+[  904.050606] [<c0008d14>] (do_one_initcall) from [<c08b2ec0>] (kernel_init_freeable+0x1c8/0x268)
+[  904.433926] [<c08b2ec0>] (kernel_init_freeable) from [<c05e82ac>] (kernel_init+0x1c/0x100)
+[  904.797782] [<c05e82ac>] (kernel_init) from [<c0023280>] (ret_from_fork+0x14/0x20)
+
+
+
+