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| author | Bryan O'Donoghue <bryan.odonoghue@linaro.org> | 2015-09-18 16:38:45 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2015-09-18 14:07:28 -0700 |
| commit | 5c8ad599b942a9a027045e69fc76c84f23c0acf0 (patch) | |
| tree | 349c5dabf6cfe89e0869f031d4585654fc1747bd /drivers/staging/greybus/core.c | |
| parent | bb03ed920166a1fa2df77d5ef96ff1d749fa2967 (diff) | |
greybus: operation, core: hook tracepoints into message opertions
This patch hooks tracepoints for greybus messages
- trace_gb_message_send
- trace_gb_message_recv_request
- trace_gb_message_recv_response
- trace_gb_message_cancel_outgoing
- trace_gb_message_cancel_incoming
It provides standard tracepoints at
/sys/kernel/debug/tracing/events/greybus/gb_message_send
/sys/kernel/debug/tracing/events/greybus/gb_message_recv_response
/sys/kernel/debug/tracing/events/greybus/gb_message_recv_request
/sys/kernel/debug/tracing/events/greybus/gb_message_cancel_outgoing
/sys/kernel/debug/tracing/events/greybus/gb_message_cancel_incoming
Giving outputs like
gb_message_recv_request: greybus:1-1.1:0 op=0001 if_id=0000 hd_id=0000 l=2
gb_message_send: greybus:1-1.1:0 op=0001 if_id=0000 hd_id=0000 l=2
Similarly perf events can be viewed with standard perf tools e.g.
root@beaglebone:~# perf list 'greybus:*'
greybus:gb_message_send [Tracepoint event]
greybus:gb_message_recv_request [Tracepoint event]
greybus:gb_message_recv_response [Tracepoint event]
greybus:gb_message_cancel_outgoing [Tracepoint event]
greybus:gb_message_cancel_incoming [Tracepoint event]
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'drivers/staging/greybus/core.c')
| -rw-r--r-- | drivers/staging/greybus/core.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/staging/greybus/core.c b/drivers/staging/greybus/core.c index 3c89cb368f6d..765e0db844f1 100644 --- a/drivers/staging/greybus/core.c +++ b/drivers/staging/greybus/core.c @@ -9,7 +9,9 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#define CREATE_TRACE_POINTS #include "greybus.h" +#include "greybus_trace.h" /* Allow greybus to be disabled at boot if needed */ static bool nogreybus; @@ -347,6 +349,7 @@ static void __exit gb_exit(void) gb_operation_exit(); bus_unregister(&greybus_bus_type); gb_debugfs_cleanup(); + tracepoint_synchronize_unregister(); } module_exit(gb_exit); MODULE_LICENSE("GPL v2"); |