hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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>
This commit is contained in:
Tim Blechmann 2009-12-27 14:43:06 +01:00 committed by Ingo Molnar
parent 049ae80b87
commit 0b413e44d6
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
tools/perf/design.txt
View File

@ -21,7 +21,7 @@ There's one file descriptor per virtual counter used.
The special file descriptor is opened via the perf_event_open() The special file descriptor is opened via the perf_event_open()
system call: 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, pid_t pid, int cpu, int group_fd,
unsigned long flags); 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 Multiple counters can be kept open at a time, and the counters
can be poll()ed. 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 * The MSB of the config word signifies if the rest contains cpu
* specific (raw) counter configuration data, if unset, the next * 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. fcntl() managing signals.
Normally a notification is generated for every page filled, however one can 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. so many counter overflow events.
Future work will include a splice() interface to the ring-buffer. Future work will include a splice() interface to the ring-buffer.