perf: Rename perf_event_hw_event in design document
perf_event_hw_event has been renamed to perf_event_attr. The design document was still using the old name, though. Signed-off-by: Tim Blechmann <tim@klingt.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4B37646A.90108@klingt.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -21,7 +21,7 @@ There's one file descriptor per virtual counter used.
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The special file descriptor is opened via the perf_event_open()
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The special file descriptor is opened via the perf_event_open()
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system call:
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system call:
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int sys_perf_event_open(struct perf_event_hw_event *hw_event_uptr,
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int sys_perf_event_open(struct perf_event_attr *hw_event_uptr,
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pid_t pid, int cpu, int group_fd,
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pid_t pid, int cpu, int group_fd,
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unsigned long flags);
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unsigned long flags);
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@ -32,9 +32,9 @@ can be used to set the blocking mode, etc.
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Multiple counters can be kept open at a time, and the counters
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Multiple counters can be kept open at a time, and the counters
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can be poll()ed.
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can be poll()ed.
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When creating a new counter fd, 'perf_event_hw_event' is:
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When creating a new counter fd, 'perf_event_attr' is:
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struct perf_event_hw_event {
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struct perf_event_attr {
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/*
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/*
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* The MSB of the config word signifies if the rest contains cpu
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* The MSB of the config word signifies if the rest contains cpu
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* specific (raw) counter configuration data, if unset, the next
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* specific (raw) counter configuration data, if unset, the next
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@ -399,7 +399,7 @@ Notification of new events is possible through poll()/select()/epoll() and
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fcntl() managing signals.
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fcntl() managing signals.
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Normally a notification is generated for every page filled, however one can
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Normally a notification is generated for every page filled, however one can
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additionally set perf_event_hw_event.wakeup_events to generate one every
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additionally set perf_event_attr.wakeup_events to generate one every
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so many counter overflow events.
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so many counter overflow events.
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Future work will include a splice() interface to the ring-buffer.
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Future work will include a splice() interface to the ring-buffer.
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