nfs-utils: nfs-iostat.py autofs cleanup and option to sort by ops/s

Adds --sort option to display mount point stats sorted by ops/s
Adds --list=<n> option to only display stats for first <n> mount points
E.g. the use of "--sort --list=1" should be useful in seeing stats for
only the mountpoint with the highest ops/s.

Signed-off-by: Lans Carstensen <Lans.Carstensen@dreamworks.com>
Signed-off-by: Steve Dickson <steved@redhat.com>

1 files changed, 52 insertions, 13 deletions

diff --git a/tools/nfs-iostat/nfs-iostat.py b/tools/nfs-iostat/nfs-iostat.py
index 5c46f92..2d0b143 100644
--- a/tools/nfs-iostat/nfs-iostat.py
+++ b/tools/nfs-iostat/nfs-iostat.py
@@ -354,6 +354,12 @@ class DeviceData:
         print '\t%7.3f' % rtt_per_op,
         print '\t%7.3f' % exe_per_op
 
+    def ops(self, sample_time):
+        sends = float(self.__rpc_data['rpcsends'])
+        if sample_time == 0:
+            sample_time = float(self.__nfs_data['age'])
+        return (sends / sample_time)
+
     def display_iostats(self, sample_time, which):
         """Display NFS and RPC stats in an iostat-like way
         """
@@ -420,7 +426,10 @@ def parse_stats_file(filename):
 
     return ms_dict
 
-def print_iostat_summary(old, new, devices, time, ac):
+def print_iostat_summary(old, new, devices, time, options):
+    stats = {}
+    diff_stats = {}
+
     if old:
         # Trim device list to only include intersection of old and new data,
         # this addresses umounts due to autofs mountpoints
@@ -429,15 +438,33 @@ def print_iostat_summary(old, new, devices, time, ac):
         devicelist = devices
 
     for device in devicelist:
-        stats = DeviceData()
-        stats.parse_stats(new[device])
-        if not old:
-            stats.display_iostats(time, ac)
-        else:
+        stats[device] = DeviceData()
+        stats[device].parse_stats(new[device])
+        if old:
             old_stats = DeviceData()
             old_stats.parse_stats(old[device])
-            diff_stats = stats.compare_iostats(old_stats)
-            diff_stats.display_iostats(time, ac)
+            diff_stats[device] = stats[device].compare_iostats(old_stats)
+
+    if options.sort:
+        if old:
+            # We now have compared data and can print a comparison
+            # ordered by mountpoint ops per second
+            devicelist.sort(key=lambda x: diff_stats[x].ops(time), reverse=True)
+        else:
+            # First iteration, just sort by newly parsed ops/s
+            devicelist.sort(key=lambda x: stats[x].ops(time), reverse=True)
+
+    count = 1
+    for device in devicelist:
+        if old:
+            diff_stats[device].display_iostats(time, options.which)
+        else:
+            stats[device].display_iostats(time, options.which)
+
+        count += 1
+        if (count > options.list):
+            return
+
 
 def list_nfs_mounts(givenlist, mountstats):
     """return a list of NFS mounts given a list to validate or
@@ -485,10 +512,10 @@ client are listed.
         usage="usage: %prog [ <interval> [ <count> ] ] [ <options> ] [ <mount point> ]",
         description=mydescription,
         version='version %s' % Iostats_version)
-    parser.set_defaults(which=0)
+    parser.set_defaults(which=0, sort=False, list=sys.maxint)
 
     statgroup = OptionGroup(parser, "Statistics Options",
-                               'File I/O is displayed unless one of the following is specified:')
+                            'File I/O is displayed unless one of the following is specified:')
     statgroup.add_option('-a', '--attr',
                             action="store_const",
                             dest="which",
@@ -505,6 +532,18 @@ client are listed.
                             const=3,
                             help='displays statistics related to the page cache')
     parser.add_option_group(statgroup)
+    displaygroup = OptionGroup(parser, "Display Options",
+                               'Options affecting display format:')
+    displaygroup.add_option('-s', '--sort',
+                            action="store_true",
+                            dest="sort",
+                            help="Sort NFS mount points by ops/second")
+    displaygroup.add_option('-l','--list',
+                            action="store",
+                            type="int",
+                            dest="list",
+                            help="only print stats for first LIST mount points")
+    parser.add_option_group(displaygroup)
 
     (options, args) = parser.parse_args(sys.argv)
 
@@ -549,12 +588,12 @@ client are listed.
     sample_time = 0.0
 
     if not interval_seen:
-        print_iostat_summary(old_mountstats, mountstats, devices, sample_time, options.which)
+        print_iostat_summary(old_mountstats, mountstats, devices, sample_time, options)
         return
 
     if count_seen:
         while count != 0:
-            print_iostat_summary(old_mountstats, mountstats, devices, sample_time, options.which)
+            print_iostat_summary(old_mountstats, mountstats, devices, sample_time, options)
             old_mountstats = mountstats
             time.sleep(interval)
             sample_time = interval
@@ -568,7 +607,7 @@ client are listed.
             count -= 1
     else: 
         while True:
-            print_iostat_summary(old_mountstats, mountstats, devices, sample_time, options.which)
+            print_iostat_summary(old_mountstats, mountstats, devices, sample_time, options)
             old_mountstats = mountstats
             time.sleep(interval)
             sample_time = interval