1 The following are examples of j_calltime.d. 2 3 This script traces the elapsed time of Java methods and prints a report of the 4 top ten in each category. This number is configurable with simple edit of 5 the DTrace script 6 7 Here it traces the example program, Code/Java/Func_abc 8 9 # j_calltime.d 10 Tracing... Hit Ctrl-C to end. 11 ^C 12 13 Top 10 counts, 14 PID TYPE NAME COUNT 15 311358 method java/lang/String.equals 202 16 311358 method java/lang/Math.min 208 17 311358 method java/lang/String.hashCode 213 18 311358 method java/lang/String.indexOf 302 19 311358 method java/lang/System.arraycopy 360 20 311358 method java/lang/StringBuilder.append 533 21 311358 method java/lang/AbstractStringBuilder.append 549 22 311358 method java/lang/Object.<init> 823 23 311358 method java/lang/String.charAt 1960 24 0 total - 12020 25 26 Top 10 elapsed times (us), 27 PID TYPE NAME TOTAL 28 29 Top 10 exclusive method elapsed times (us), 30 PID TYPE NAME TOTAL 31 311358 method java/nio/ByteBuffer.<init> 5430 32 311358 method java/lang/String.charAt 6079 33 311358 method java/lang/String.<init> 7306 34 311358 method java/lang/StringBuilder.append 10240 35 311358 method java/util/StringTokenizer.scanToken 11075 36 311358 method java/net/URL.<clinit> 12519 37 311358 method java/io/UnixFileSystem.normalize 13218 38 311358 method sun/net/www/ParseUtil.decode 14208 39 311358 method java/lang/Thread.sleep 3016374 40 0 total - 3344993 41 42 Top 10 inclusive method elapsed times (us), 43 PID TYPE NAME TOTAL 44 311358 method sun/misc/Launcher.<clinit> 129120 45 311358 method java/lang/ClassLoader.initSystemClassLoader 129851 46 311358 method java/lang/ClassLoader.getSystemClassLoader 129897 47 311358 method java/lang/ClassLoader.loadClass 267404 48 311358 method java/security/AccessController.doPrivileged 278364 49 311358 method Func_abc.func_c 1009971 50 311358 method Func_abc.func_b 2019995 51 311358 method java/lang/Thread.sleep 3016374 52 311358 method Func_abc.func_a 3027043 53 311358 method Func_abc.main 3027068 54 55 Counts shows us how many times each different method was called, and how 56 many methods were called in total. 57 58 The exclusive method elapsed times show the time that each method spent 59 processing code - while not in other method. 60 61 The inclusive method elapsed times show the time that each method spent 62 processing code, including the time spent in other calls. 63 64 These elapsed times are the absolute time from when the method began to 65 when it completed - which includes off-CPU time due to other system events 66 such as I/O, scheduling, interrupts, etc. 67 68
Indexes created Sun Apr 26 00:22:38 UTC 2026