opensnoop: Refactor initial timestamp calculation
Signed-off-by: KarimAllah Ahmed <[email protected]>
diff --git a/tools/opensnoop.py b/tools/opensnoop.py
index 6b45885..78c3fea 100755
--- a/tools/opensnoop.py
+++ b/tools/opensnoop.py
@@ -129,9 +129,7 @@
("fname", ct.c_char * NAME_MAX)
]
-start_ts = 0
-prev_ts = 0
-delta = 0
+initial_ts = 0
# header
if args.timestamp:
@@ -141,9 +139,7 @@
# process event
def print_event(cpu, data, size):
event = ct.cast(data, ct.POINTER(Data)).contents
- global start_ts
- global prev_ts
- global delta
+ global initial_ts
# split return value into FD and errno columns
if event.ret >= 0:
@@ -153,25 +149,18 @@
fd_s = -1
err = - event.ret
- if start_ts == 0:
- prev_ts = start_ts
+ if not initial_ts:
+ initial_ts = event.ts
- if start_ts == 1:
- delta = float(delta) + (event.ts - prev_ts)
-
- if (args.failed and (event.ret >= 0)):
- start_ts = 1
- prev_ts = event.ts
+ if args.failed and (event.ret >= 0):
return
if args.timestamp:
- print("%-14.9f" % (delta / 1000000), end="")
+ delta = event.ts - initial_ts
+ print("%-14.9f" % (float(delta) / 1000000), end="")
print("%-6d %-16s %4d %3d %s" % (event.pid, event.comm,
- fd_s, err, event.fname))
-
- prev_ts = event.ts
- start_ts = 1
+ fd_s, err, event.fname))
# loop with callback to print_event
b["events"].open_perf_buffer(print_event)
