Mobile/Fennec/Android/Profiling: Difference between revisions

Mobile/Fennec/Android/Profiling (view source)

Revision as of 17:35, 7 March 2012

3,137 bytes added , 7 March 2012

→‎Using oprofile on Galaxy Nexus

Gbrown

Confirmed users

1,759

edits

@@ Line 442: / Line 442: @@
 mylinux$ adb shell dmesg | grep oprofile
 <6>[    2.772705] oprofile: using arm/armv7-ca9
+ </nowiki>
+Now everything appears to be working, but I cannot seem to collect samples!
+ <nowiki>
+    root@android:/data/local # opcontrol --reset --kernel-range=0xc004d000,0xc0752000 --event=CPU_CYCLES:1 --setup --status --verbose-log=all --verbose
+    list_events = 0
+    setup = 1
+    Configure /dev/oprofile/0/user (1)
+    Configure /dev/oprofile/0/kernel (1)
+    Configure /dev/oprofile/0/unit_mask (0)
+    Configure /dev/oprofile/0/enabled (1)
+    Configure /dev/oprofile/0/count (1)
+    Configure /dev/oprofile/0/event (255)
+    Configure /dev/oprofile/1/enabled (0)
+    Configure /dev/oprofile/2/enabled (0)
+    Configure /dev/oprofile/3/enabled (0)
+    Configure /dev/oprofile/4/enabled (0)
+    Starting oprofiled...
+    command: oprofiled --session-dir=/data/oprofile --events=CPU_CYCLES:255:0:1:0:1:1 --no-vmlinux -r 0xc004d000,0xc0752000 --verbose=all
+    Events: CPU_CYCLES:255:0:1:0:1:1
+    Using 2.6+ OProfile kernel interface.
+    Using log file /data/oprofile/samples/oprofiled.log
+    Ready
+    Driver directory: /dev/oprofile
+    Session directory: /data/oprofile
+    Counter 0:
+        name: CPU_CYCLES
+        count: 1
+    Counter 1 disabled
+    Counter 2 disabled
+    Counter 3 disabled
+    Counter 4 disabled
+    oprofiled pid: 1528
+    profiler is not running
+      cpu1         0 samples received
+      cpu1         0 samples lost overflow
+      cpu1         0 samples invalid eip
+      cpu1         0 backtrace aborted
+      cpu0         0 samples received
+      cpu0         0 samples lost overflow
+      cpu0         0 samples invalid eip
+      cpu0         0 backtrace aborted
+    root@android:/data/local #
+    root@android:/data/local # opcontrol --start
+    root@android:/data/local # opcontrol --status --verbose
+    list_events = 0
+    setup = 0
+    Driver directory: /dev/oprofile
+    Session directory: /data/oprofile
+    Counter 0:
+        name: CPU_CYCLES
+        count: 1
+    Counter 1 disabled
+    Counter 2 disabled
+    Counter 3 disabled
+    Counter 4 disabled
+    oprofiled pid: 1528
+    profiler is running
+      cpu1         0 samples received
+      cpu1         0 samples lost overflow
+      cpu1         0 samples invalid eip
+      cpu1         0 backtrace aborted
+      cpu0         0 samples received
+      cpu0         0 samples lost overflow
+      cpu0         0 samples invalid eip
+      cpu0         0 backtrace aborted
+    root@android:/data/local # opcontrol --stop
+    root@android:/data/local # ls -lR /data/oprofile
+    /data/oprofile:
+    -rw-rw-rw- root     root          724 2012-03-07 16:43 abi
+    -rw-rw-rw- root     root            2 2012-03-07 16:46 complete_dump
+    -rw-rw-rw- root     root            4 2012-03-07 16:43 lock
+    prw-rw-rw- root     root              2012-03-07 16:43 opd_pipe
+    drwxr-xr-x root     root              2012-03-07 16:43 samples
+    /data/oprofile/samples:
+    -rw-r--r-- root     root        57424 2012-03-07 16:46 oprofiled.log
+    root@android:/data/local # tail /data/oprofile/samples/oprofiled.log
+    ...
+    CPU_SWITCH to 1
+    CPU_SWITCH to 0
+    CPU_SWITCH to 1
+    CPU_SWITCH to 0
+    CPU_SWITCH to 1
   </nowiki>