igt@perf_pmu@cpu-hotplug - skip - Test requirement not met in function cpu_hotplug, Test requirement: cpu0_hotplug_support(), Last errno: 2

http://gfx-ci.igk.intel.com/cibuglog-ng/testresult/1492024924?query_key=0f0365a17ac4ea299275663259972f9ab4563d67

Stdout	
Opened device: /dev/dri/card0
Starting subtest: cpu-hotplug
Test requirement not met in function cpu_hotplug, file ../../../usr/src/igt-gpu-tools/tests/i915/perf_pmu.c:1493:
Test requirement: cpu0_hotplug_support()
Last errno: 2, No such file or directory
Subtest cpu-hotplug: SKIP (0.012s)
Opened device: /dev/dri/renderD128

Stderr	
Starting subtest: cpu-hotplug
Subtest cpu-hotplug: SKIP (0.012s)

Dmesg	
<6> [650.736881] Console: switching to colour dummy device 80x25
<6> [650.739065] [IGT] perf_pmu: executing
<7> [650.752347] i915 0000:00:02.0: [drm:i915_gem_open [i915]]
<7> [650.755833] i915 0000:00:02.0: [drm:i915_gem_open [i915]]
<6> [650.781897] [IGT] perf_pmu: starting subtest cpu-hotplug
<7> [650.783923] [drm:eb_lookup_vmas [i915]] EINVAL at eb_validate_vma:508
<6> [650.796215] [IGT] perf_pmu: finished subtest cpu-hotplug, SKIP
<7> [650.796555] i915 0000:00:02.0: [drm:i915_gem_open [i915]]
<7> [650.799808] i915 0000:00:02.0: [drm:i915_gem_open [i915]]
<7> [650.806655] i915 0000:00:02.0: [drm:i915_drop_caches_set [i915]] Dropping caches: 0x0000005c [0x0000005c]
<6> [650.864055] [IGT] perf_pmu: exiting, ret=77
<6> [650.873621] Console: switching to colour frame buffer device 360x112