From faa02fd2b6bdfc7c41b71ef6635314e23b19d50f Mon Sep 17 00:00:00 2001
From: Guillaume Chazarain <guichaz@gmail.com>
Date: Sat, 29 Aug 2009 14:36:37 +0200
Subject: [PATCH] Optimization: call getpriority() instead of reading /proc

---
 iotop/ioprio.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/iotop/ioprio.py b/iotop/ioprio.py
index d1162a8..40a4dbf 100644
--- a/iotop/ioprio.py
+++ b/iotop/ioprio.py
@@ -50,9 +50,12 @@ def ioprio_data(ioprio):
 sched_getscheduler = ctypes_handle.sched_getscheduler
 SCHED_OTHER, SCHED_FIFO, SCHED_RR, SCHED_BATCH, SCHED_ISO, SCHED_IDLE = range(6)
 
+getpriority = ctypes_handle.getpriority
+PRIO_PROCESS = 0
+
 def get_ioprio_from_sched(pid):
     scheduler = sched_getscheduler(pid)
-    nice = int(open('/proc/%d/stat' % pid).read().split()[18])
+    nice = getpriority(PRIO_PROCESS, pid)
     ioprio_nice = (nice + 20) / 5
 
     if scheduler in (SCHED_FIFO, SCHED_RR):
-- 
2.11.4.GIT