From: mcaleavya <allan.mcaleavy@gmail.com>
Date: Fri, 12 Feb 2016 23:43:14 +0000 (+0000)
Subject: style updates
X-Git-Tag: v0.1.8~26^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=62c6152c69910609f61a74e2567baa628615178b;p=platform%2Fupstream%2Fbcc.git

style updates
---

diff --git a/man/man8/biosnoop.8 b/man/man8/biosnoop.8
index f563b9f..e5dbeaa 100644
--- a/man/man8/biosnoop.8
+++ b/man/man8/biosnoop.8
@@ -12,6 +12,9 @@ the I/O was first created (which usually identifies the responsible process).
 This uses in-kernel eBPF maps to cache process details (PID and comm) by I/O
 request, as well as a starting timestamp for calculating I/O latency.
 
+This works by tracing various kernel blk_*() functions using dynamic tracing,
+and will need updating to match any changes to these functions.
+
 This makes use of a Linux 4.5 feature (bpf_perf_event_output());
 for kernels older than 4.5, see the version under tools/old,
 which uses an older mechanism
diff --git a/tools/biosnoop.py b/tools/biosnoop.py
index fb77763..702c97b 100755
--- a/tools/biosnoop.py
+++ b/tools/biosnoop.py
@@ -138,6 +138,7 @@ rwflg = ""
 start_ts = 0
 prev_ts = 0
 delta = 0
+
 # process event
 def print_event(cpu, data, size):
     event = ct.cast(data, ct.POINTER(Data)).contents
@@ -169,6 +170,7 @@ def print_event(cpu, data, size):
     prev_ts = event.ts
     start_ts = 1
 
+# loop with callback to print_event
 b["events"].open_perf_buffer(print_event)
 while 1:
     b.kprobe_poll()