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authorDavid Howells <dhowells@redhat.com>2017-11-02 15:27:51 +0000
committerDavid Howells <dhowells@redhat.com>2017-11-13 15:38:19 +0000
commit2c099014a0a456012c1778e80adce839bf956b77 (patch)
tree1ea2a00f106f02853bdff8309fdb83c59c17377d
parent025db80c9e421efef11f2b83b7f78a11476f06db (diff)
downloadop-kernel-dev-2c099014a0a456012c1778e80adce839bf956b77.zip
op-kernel-dev-2c099014a0a456012c1778e80adce839bf956b77.tar.gz
afs: Trace the sending of pages
Add a pair of tracepoints to log the sending of pages for an FS.StoreData or FS.StoreData64 operation. Tracepoint afs_send_pages notes each set of pages added to the operation. There may be several of these per operation as we get up at most 8 contiguous pages in one go because the bvec we're using is on the stack. Tracepoint afs_sent_pages notes the end of adding data from a whole run of pages to the operation and the completion of the request phase. Signed-off-by: David Howells <dhowells@redhat.com>
-rw-r--r--fs/afs/rxrpc.c3
-rw-r--r--include/trace/events/afs.h61
2 files changed, 64 insertions, 0 deletions
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 59cc580..06a51d7 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -303,6 +303,8 @@ static int afs_send_pages(struct afs_call *call, struct msghdr *msg)
do {
afs_load_bvec(call, msg, bv, first, last, offset);
+ trace_afs_send_pages(call, msg, first, last, offset);
+
offset = 0;
bytes = msg->msg_iter.count;
nr = msg->msg_iter.nr_segs;
@@ -317,6 +319,7 @@ static int afs_send_pages(struct afs_call *call, struct msghdr *msg)
first += nr;
} while (first <= last);
+ trace_afs_sent_pages(call, call->first, last, first, ret);
return ret;
}
diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h
index dd9d260..c780f4c 100644
--- a/include/trace/events/afs.h
+++ b/include/trace/events/afs.h
@@ -320,6 +320,67 @@ TRACE_EVENT(afs_call_done,
__entry->rx_call)
);
+TRACE_EVENT(afs_send_pages,
+ TP_PROTO(struct afs_call *call, struct msghdr *msg,
+ pgoff_t first, pgoff_t last, unsigned int offset),
+
+ TP_ARGS(call, msg, first, last, offset),
+
+ TP_STRUCT__entry(
+ __field(struct afs_call *, call )
+ __field(pgoff_t, first )
+ __field(pgoff_t, last )
+ __field(unsigned int, nr )
+ __field(unsigned int, bytes )
+ __field(unsigned int, offset )
+ __field(unsigned int, flags )
+ ),
+
+ TP_fast_assign(
+ __entry->call = call;
+ __entry->first = first;
+ __entry->last = last;
+ __entry->nr = msg->msg_iter.nr_segs;
+ __entry->bytes = msg->msg_iter.count;
+ __entry->offset = offset;
+ __entry->flags = msg->msg_flags;
+ ),
+
+ TP_printk(" c=%p %lx-%lx-%lx b=%x o=%x f=%x",
+ __entry->call,
+ __entry->first, __entry->first + __entry->nr - 1, __entry->last,
+ __entry->bytes, __entry->offset,
+ __entry->flags)
+ );
+
+TRACE_EVENT(afs_sent_pages,
+ TP_PROTO(struct afs_call *call, pgoff_t first, pgoff_t last,
+ pgoff_t cursor, int ret),
+
+ TP_ARGS(call, first, last, cursor, ret),
+
+ TP_STRUCT__entry(
+ __field(struct afs_call *, call )
+ __field(pgoff_t, first )
+ __field(pgoff_t, last )
+ __field(pgoff_t, cursor )
+ __field(int, ret )
+ ),
+
+ TP_fast_assign(
+ __entry->call = call;
+ __entry->first = first;
+ __entry->last = last;
+ __entry->cursor = cursor;
+ __entry->ret = ret;
+ ),
+
+ TP_printk(" c=%p %lx-%lx c=%lx r=%d",
+ __entry->call,
+ __entry->first, __entry->last,
+ __entry->cursor, __entry->ret)
+ );
+
#endif /* _TRACE_AFS_H */
/* This part must be outside protection */
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