diff options
author | Ingo Molnar <mingo@elte.hu> | 2010-01-13 09:58:37 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2010-01-13 10:08:50 +0100 |
commit | 61405fea92c42d072d9b8bd189689f1502a838af (patch) | |
tree | 013ea3e7ed71f4114004d5852d40b6e89e128f76 /tools/perf/design.txt | |
parent | 9c443dfdd31eddea6cbe6ee0ca469fbcc4e1dc3b (diff) | |
parent | 1703f2c321a8a531c393e137a82602e16c6061cb (diff) |
Merge branch 'perf/urgent' into perf/core
Merge reason: queue up dependent patch, update to -rc4
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/design.txt')
-rw-r--r-- | tools/perf/design.txt | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/tools/perf/design.txt b/tools/perf/design.txt index f000c30877a..8d0de5130db 100644 --- a/tools/perf/design.txt +++ b/tools/perf/design.txt @@ -21,7 +21,7 @@ There's one file descriptor per virtual counter used. The special file descriptor is opened via the perf_event_open() system call: - int sys_perf_event_open(struct perf_event_hw_event *hw_event_uptr, + int sys_perf_event_open(struct perf_event_attr *hw_event_uptr, pid_t pid, int cpu, int group_fd, unsigned long flags); @@ -32,9 +32,9 @@ can be used to set the blocking mode, etc. Multiple counters can be kept open at a time, and the counters can be poll()ed. -When creating a new counter fd, 'perf_event_hw_event' is: +When creating a new counter fd, 'perf_event_attr' is: -struct perf_event_hw_event { +struct perf_event_attr { /* * The MSB of the config word signifies if the rest contains cpu * specific (raw) counter configuration data, if unset, the next @@ -399,7 +399,7 @@ Notification of new events is possible through poll()/select()/epoll() and fcntl() managing signals. Normally a notification is generated for every page filled, however one can -additionally set perf_event_hw_event.wakeup_events to generate one every +additionally set perf_event_attr.wakeup_events to generate one every so many counter overflow events. Future work will include a splice() interface to the ring-buffer. |