/* * Copyright 2014, Michael Ellerman, IBM Corp. * Licensed under GPLv2. */ #define _GNU_SOURCE #include #include #include #include #include #include #include "event.h" #include "lib.h" #include "utils.h" /* * Test that per-event excludes work. */ static int per_event_excludes(void) { struct event *e, events[4]; char *platform; int i; platform = (char *)get_auxv_entry(AT_BASE_PLATFORM); FAIL_IF(!platform); SKIP_IF(strcmp(platform, "power8") != 0); /* * We need to create the events disabled, otherwise the running/enabled * counts don't match up. */ e = &events[0]; event_init_opts(e, PERF_COUNT_HW_INSTRUCTIONS, PERF_TYPE_HARDWARE, "instructions"); e->attr.disabled = 1; e = &events[1]; event_init_opts(e, PERF_COUNT_HW_INSTRUCTIONS, PERF_TYPE_HARDWARE, "instructions(k)"); e->attr.disabled = 1; e->attr.exclude_user = 1; e->attr.exclude_hv = 1; e = &events[2]; event_init_opts(e, PERF_COUNT_HW_INSTRUCTIONS, PERF_TYPE_HARDWARE, "instructions(h)"); e->attr.disabled = 1; e->attr.exclude_user = 1; e->attr.exclude_kernel = 1; e = &events[3]; event_init_opts(e, PERF_COUNT_HW_INSTRUCTIONS, PERF_TYPE_HARDWARE, "instructions(u)"); e->attr.disabled = 1; e->attr.exclude_hv = 1; e->attr.exclude_kernel = 1; FAIL_IF(event_open(&events[0])); /* * The open here will fail if we don't have per event exclude support, * because the second event has an incompatible set of exclude settings * and we're asking for the events to be in a group. */ for (i = 1; i < 4; i++) FAIL_IF(event_open_with_group(&events[i], events[0].fd)); /* * Even though the above will fail without per-event excludes we keep * testing in order to be thorough. */ prctl(PR_TASK_PERF_EVENTS_ENABLE); /* Spin for a while */ for (i = 0; i < INT_MAX; i++) asm volatile("" : : : "memory"); prctl(PR_TASK_PERF_EVENTS_DISABLE); for (i = 0; i < 4; i++) { FAIL_IF(event_read(&events[i])); event_report(&events[i]); } /* * We should see that all events have enabled == running. That * shows that they were all on the PMU at once. */ for (i = 0; i < 4; i++) FAIL_IF(events[i].result.running != events[i].result.enabled); /* * We can also check that the result for instructions is >= all the * other counts. That's because it is counting all instructions while * the others are counting a subset. */ for (i = 1; i < 4; i++) FAIL_IF(events[0].result.value < events[i].result.value); for (i = 0; i < 4; i++) event_close(&events[i]); return 0; } int main(void) { return test_harness(per_event_excludes, "per_event_excludes"); } lue='search'/>
path: root/tools/lib/traceevent/plugin_cfg80211.c
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authorDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-12 17:15:56 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-30 10:17:32 +0100
commite6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0 (patch)
tree77cadb6d8aad1b52c34e4afa8c9deef603bbe2ed /tools/lib/traceevent/plugin_cfg80211.c
parent4e5b54f127426c82dc2816340c26d951a5bb3429 (diff)
drm: Don't race connector registration
I was under the misconception that the sysfs dev stuff can be fully set up, and then registered all in one step with device_add. That's true for properties and property groups, but not for parents and child devices. Those must be fully registered before you can register a child. Add a bit of tracking to make sure that asynchronous mst connector hotplugging gets this right. For consistency we rely upon the implicit barriers of the connector->mutex, which is taken anyway, to ensure that at least either the connector or device registration call will work out. Mildly tested since I can't reliably reproduce this on my mst box here. Reported-by: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'tools/lib/traceevent/plugin_cfg80211.c')