[oe-commits] [bitbake] 04/08: monitordisk: add event

[git at git.openembedded.org]

rpurdie pushed a commit to branch master
in repository bitbake.

commit f065ac17d0031dca6309ddbff18c8792630de865
Author: Patrick Ohly <patrick.ohly at intel.com>
AuthorDate: Tue Nov 29 17:47:45 2016 +0100

    monitordisk: add event
    
    The current disk usage is interesting and may be worth logging over
    time as part of the build statistics. Instead of re-implementing the
    code and the configuration option (BB_DISKMON_DIRS), the information
    gathered by monitordisk.py is made available to buildstats.bbclass via
    a new event.
    
    This has pros and cons:
    - there is already a useful default configuration for "interesting" directories
    - no code duplication
    - on the other hand, users cannot configure recording separately from
      monitoring (probably not that important)
    
    Signed-off-by: Patrick Ohly <patrick.ohly at intel.com>
    Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 lib/bb/event.py       | 17 +++++++++++++++++
 lib/bb/monitordisk.py |  8 ++++++++
 2 files changed, 25 insertions(+)

diff --git a/lib/bb/event.py b/lib/bb/event.py
index cacbac8..5491914 100644
--- a/lib/bb/event.py
+++ b/lib/bb/event.py
@@ -451,6 +451,23 @@ class DiskFull(Event):
         self._free = freespace
         self._mountpoint = mountpoint
 
+class DiskUsageSample:
+    def __init__(self, available_bytes, free_bytes, total_bytes):
+        # Number of bytes available to non-root processes.
+        self.available_bytes = available_bytes
+        # Number of bytes available to root processes.
+        self.free_bytes = free_bytes
+        # Total capacity of the volume.
+        self.total_bytes = total_bytes
+
+class MonitorDiskEvent(Event):
+    """If BB_DISKMON_DIRS is set, then this event gets triggered each time disk space is checked.
+       Provides information about devices that are getting monitored."""
+    def __init__(self, disk_usage):
+        Event.__init__(self)
+        # hash of device root path -> DiskUsageSample
+        self.disk_usage = disk_usage
+
 class NoProvider(Event):
     """No Provider for an Event"""
 
diff --git a/lib/bb/monitordisk.py b/lib/bb/monitordisk.py
index d3d2106..833cd3d 100644
--- a/lib/bb/monitordisk.py
+++ b/lib/bb/monitordisk.py
@@ -205,6 +205,7 @@ class diskMonitor:
         """ Take action for the monitor """
 
         if self.enableMonitor:
+            diskUsage = {}
             for k, attributes in self.devDict.items():
                 path, action = k
                 dev, minSpace, minInode = attributes
@@ -214,6 +215,11 @@ class diskMonitor:
                 # The available free space, integer number
                 freeSpace = st.f_bavail * st.f_frsize
 
+                # Send all relevant information in the event.
+                freeSpaceRoot = st.f_bfree * st.f_frsize
+                totalSpace = st.f_blocks * st.f_frsize
+                diskUsage[dev] = bb.event.DiskUsageSample(freeSpace, freeSpaceRoot, totalSpace)
+
                 if minSpace and freeSpace < minSpace:
                     # Always show warning, the self.checked would always be False if the action is WARN
                     if self.preFreeS[k] == 0 or self.preFreeS[k] - freeSpace > self.spaceInterval and not self.checked[k]:
@@ -257,4 +263,6 @@ class diskMonitor:
                         self.checked[k] = True
                         rq.finish_runqueue(True)
                         bb.event.fire(bb.event.DiskFull(dev, 'inode', freeInode, path), self.configuration)
+
+            bb.event.fire(bb.event.MonitorDiskEvent(diskUsage), self.configuration)
         return

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