+   79.67%     6.25%  [kernel]                 [k] alloc_iova
+   79.46%     0.01%  [kernel]                 [k] do_vfs_ioctl
+   74.36%    74.36%  [kernel]                 [k] rb_prev
+   64.77%     0.00%  [kernel]                 [k] entry_SYSCALL_64_fastpath
+   45.05%     0.00%  [kernel]                 [k] sys_ioctl
+   23.77%     0.00%  [kernel]                 [k] intel_alloc_iova
+   23.77%     0.00%  [kernel]                 [k] intel_map_page
+   23.77%     0.00%  [kernel]                 [k] __intel_map_single
+   23.77%     0.00%  [unknown]                [k] 0x00007fb9b70ac847
+   23.77%     0.00%  [kernel]                 [k] radeon_drm_ioctl
+   23.77%     0.00%  [kernel]                 [k] drm_ioctl
+   23.77%     0.00%  [kernel]                 [k] radeon_cs_ioctl
+   23.77%     0.00%  [kernel]                 [k] radeon_cs_parser_relocs
+   23.77%     0.00%  [kernel]                 [k] radeon_bo_list_validate
+   23.77%     0.00%  [kernel]                 [k] ttm_bo_validate
+   23.77%     0.00%  [kernel]                 [k] ttm_bo_mem_space
+   23.77%     0.00%  [kernel]                 [k] ttm_mem_evict_first
+   23.77%     0.00%  [kernel]                 [k] ttm_bo_evict
+   23.77%     0.00%  [kernel]                 [k] ttm_bo_handle_move_mem
+   23.77%     0.00%  [kernel]                 [k] ttm_tt_bind
+   23.77%     0.00%  [kernel]                 [k] radeon_ttm_tt_populate
+    3.93%     0.01%  perf                     [.] hist_entry_iter__add
+    3.43%     0.01%  [kernel]                 [k] call_cpuidle
+    3.04%     0.01%  [kernel]                 [k] task_numa_work
+    3.02%     0.04%  [kernel]                 [k] change_protection
+    2.91%     0.00%  [kernel]                 [k] prepare_exit_to_usermode
+    2.85%     0.53%  [kernel]                 [k] smp_call_function_many
+    2.43%     2.43%  [kernel]                 [k] smp_call_function_single
+    2.25%     0.01%  [kernel]                 [k] ret_from_intr
+    2.24%     0.00%  [kernel]                 [k] do_IRQ
+    1.98%     1.42%  [kernel]                 [k] xhci_irq
+    1.67%     0.00%  [kernel]                 [k] handle_edge_irq
+    1.57%     0.02%  [kernel]                 [k] schedule
+    1.54%     0.15%  [kernel]                 [k] __schedule
+    1.34%     0.00%  [kernel]                 [k] cpu_startup_entry
+    1.26%     0.00%  perf                     [.] cmd_top