profile questions

[Anthony Green <green at redhat dot com>]

I just profiled tomcat's hello world servlet on i386 FC development.

To do this, I just installed the following two packages...
tomcat5-5.5.17-6jpp.1
tomcat5-webapps-5.5.17-6jpp.1
...ran "service tomcat5 start", and then oprofiled while running...
ab -n 20000 -c 160 http://172.31.0.50:8080/servlets-examples/servlet/HelloWorldExample
(ab is part of the httpd package)

I have all of appropriate gcc and tomcat debuginfo installed.

See below for the top of "opreport -l".

So, my questions...
1. What's with _dl_addr taking > 51% of the time?
2. What's with the messed up .so name for catalina?

AG

samples  %        image name               app name                 symbol name
163446   51.2100  libc-2.4.90.so           libc-2.4.90.so           _dl_addr
56530    17.7117  no-vmlinux               no-vmlinux               (no symbols)
9706      3.0410  libgcj.so.7rh.0.0        libgcj.so.7rh.0.0        GC_mark_from
6434      2.0159  catalina-5.5.17.jar.sorlq7aq.so catalina-5.5.17.jar.sorlq7aq.so (no symbols)
3099      0.9710  libgcc_s-4.1.1-20060825.so.1 libgcc_s-4.1.1-20060825.so.1 _Unwind_IteratePhdrCallback
2552      0.7996  libgcj.so.7rh.0.0        libgcj.so.7rh.0.0        bool java::lang::String::startsWith(java::lang::String*,
int)
2434      0.7626  libgcj.so.7rh.0.0        libgcj.so.7rh.0.0        GC_malloc_atomic
2316      0.7256  libgcj.so.7rh.0.0        libgcj.so.7rh.0.0        .plt
2269      0.7109  libgcj.so.7rh.0.0        libgcj.so.7rh.0.0        _Jv_LookupInterfaceMethodIdx
1920      0.6016  oprofiled                oprofiled                (no symbols)
1769      0.5543  libgcj.so.7rh.0.0        libgcj.so.7rh.0.0        _Jv_MonitorEnter
1689      0.5292  libgcj.so.7rh.0.0        libgcj.so.7rh.0.0        GC_gcj_malloc
1534      0.4806  libgcj.so.7rh.0.0        libgcj.so.7rh.0.0        _Jv_InterpMethod::run(void*, ffi_raw*, _Jv_InterpMethod*)1300      0.4073  libgcj.so.7rh.0.0        libgcj.so.7rh.0.0        _Jv_MonitorExit
1185      0.3713  libc-2.4.90.so           libc-2.4.90.so           memset
1073      0.3362  libgcj.so.7rh.0.0        libgcj.so.7rh.0.0        GC_add_to_black_list_normal
1036      0.3246  libc-2.4.90.so           libc-2.4.90.so           strlen
1008      0.3158  mx4j-3.0.1.jar.so        mx4j-3.0.1.jar.so        (no symbols)
989       0.3099  libc-2.4.90.so           libc-2.4.90.so           memcpy
984       0.3083  libpthread-2.4.90.so     libpthread-2.4.90.so     __pthread_mutex_unlock_usercnt
924       0.2895  libpthread-2.4.90.so     libpthread-2.4.90.so     pthread_mutex_lock
869       0.2723  libgcj.so.7rh.0.0        libgcj.so.7rh.0.0        _Jv_IsAssignableFrom(java::lang::Class*, java::lang::Class*)
850       0.2663  libgcj.so.7rh.0.0        libgcj.so.7rh.0.0        bool java::lang::String::equals(java::lang::Object*)