Merge pull request #895 from brendangregg/master

gethostlatency: remove unused code

tools/gethostlatency.py

@@ -34,7 +34,6 @@ struct val_t {
 
 struct data_t {
     u32 pid;
-    u64 ts;
     u64 delta;
     char comm[TASK_COMM_LEN];
     char host[80];
@@ -77,7 +76,6 @@ int do_return(struct pt_regs *ctx) {
     bpf_probe_read(&data.host, sizeof(data.host), (void *)valp->host);
     data.pid = valp->pid;
     data.delta = tsp - valp->ts;
-    data.ts = tsp / 1000;
     events.perf_submit(ctx, &data, sizeof(data));
     start.delete(&pid);
     return 0;
@@ -96,37 +94,19 @@ TASK_COMM_LEN = 16    # linux/sched.h
 class Data(ct.Structure):
     _fields_ = [
         ("pid", ct.c_ulonglong),
-        ("ts", ct.c_ulonglong),
         ("delta", ct.c_ulonglong),
         ("comm", ct.c_char * TASK_COMM_LEN),
         ("host", ct.c_char * 80)
     ]
 
-start_ts = 0
-prev_ts = 0
-delta = 0
-
 # header
 print("%-9s %-6s %-16s %10s %s" % ("TIME", "PID", "COMM", "LATms", "HOST"))
 
 def print_event(cpu, data, size):
     event = ct.cast(data, ct.POINTER(Data)).contents
-    global start_ts
-    global prev_ts
-    global delta
-
-    if start_ts == 0:
-        prev_ts = start_ts
-
-    if start_ts == 1:
-        delta = float(delta) + (event.ts - prev_ts)
-
     print("%-9s %-6d %-16s %10.2f %s" % (strftime("%H:%M:%S"), event.pid,
         event.comm, (event.delta / 1000000), event.host))
 
-    prev_ts = event.ts
-    start_ts = 1
-
 # loop with callback to print_event
 b["events"].open_perf_buffer(print_event)
 while 1: