From 5db227b05ba316713d6793e728b21366e8337721 Mon Sep 17 00:00:00 2001
From: "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
Date: Sat, 4 Apr 2020 20:23:21 -0400
Subject: Initial commit

---
 nureadahead-collect | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100755 nureadahead-collect

(limited to 'nureadahead-collect')

diff --git a/nureadahead-collect b/nureadahead-collect
new file mode 100755
index 0000000..9cf17fe
--- /dev/null
+++ b/nureadahead-collect
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+usage() {
+    echo "usage: nureadahead-collect DEVICE TIMEOUT > file" >&2
+}
+
+case "$1" in
+    -*) usage; exit 1
+esac
+
+case "$#" in
+    2) device=$1 timeout=$2;;
+    *) usage; exit 1
+esac
+
+awk_prog2='
+$1 <= end && $2 > end {
+    end = $2
+}
+$1 > end && NR != 1 {
+    print start " " end
+}
+$1 > end {
+    start = $1
+    end = $2
+}
+END {
+    print start " " end
+}
+'
+
+blktrace -a read -d "$1" -w "$timeout" -o - \
+    | blkparse -f "%a %d %e %n %S\n" -i - \
+    | awk '$1 == "C" && $2 ~ /R/ && $2 !~ /A/ && $3 == 0 { print $5 " " $5 + $4 - 1 }' \
+    | sort -n -k1,1 -k2,2 \
+    | awk "$awk_prog2"
-- 
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