sprof(1) General Commands Manual sprof(1) sprof - sprof [option ...] shared-object-path [profile-data-path] sprof ( ) . () . sprof <->.profile . : --call-pairs -c . --flat-profile -p . --graph -q . . : --help -? . --usage . --version -V . GNU. sprof. . : $ cat prog.c; #include void x1(void); void x2(void); int main(int argc, char *argv[]) { x1(); x2(); exit(EXIT_SUCCESS); } x1() x2() : $ cat libdemo.c; #include void consumeCpu1(int lim) { for (unsigned int j = 0; j < lim; j++) getppid(); } void x1(void) { for (unsigned int j = 0; j < 100; j++) consumeCpu1(200000); } void consumeCpu2(int lim) { for (unsigned int j = 0; j < lim; j++) getppid(); } void x2(void) { for (unsigned int j = 0; j < 1000; j++) consumeCpu2(10000); } libdemo.so.1.0.1 libdemo.so.1: $ cc -g -fPIC -shared -Wl,-soname,libdemo.so.1 \ -o libdemo.so.1.0.1 libdemo.c; : $ ln -sf libdemo.so.1.0.1 libdemo.so.1; $ ln -sf libdemo.so.1 libdemo.so; : $ cc -g -o prog prog.c -L. -ldemo; $ ldd prog; linux-vdso.so.1 => (0x00007fff86d66000) libdemo.so.1 => not found libc.so.6 => /lib64/libc.so.6 (0x00007fd4dc138000) /lib64/ld-linux-x86-64.so.2 (0x00007fd4dc51f000) LD_PROFILE : $ export LD_PROFILE=libdemo.so.1; LD_PROFILE_OUTPUT : $ export LD_PROFILE_OUTPUT=$(pwd)/prof_data; $ mkdir -p $LD_PROFILE_OUTPUT; LD_PROFILE : $ rm -f $LD_PROFILE_OUTPUT/$LD_PROFILE.profile; LD_PROFILE_OUTPUT: $ LD_LIBRARY_PATH=. ./prog; $ ls prof_data; libdemo.so.1.profile sprof -p : $ sprof -p libdemo.so.1 $LD_PROFILE_OUTPUT/libdemo.so.1.profile; Flat profile: Each sample counts as 0.01 seconds. % cumulative self self total time seconds seconds calls us/call us/call name 60.00 0.06 0.06 100 600.00 consumeCpu1 40.00 0.10 0.04 1000 40.00 consumeCpu2 0.00 0.10 0.00 1 0.00 x1 0.00 0.10 0.00 1 0.00 x2 sprof -q : $ sprof -q libdemo.so.1 $LD_PROFILE_OUTPUT/libdemo.so.1.profile; index % time self children called name 0.00 0.00 100/100 x1 [1] [0] 100.0 0.00 0.00 100 consumeCpu1 [0] ----------------------------------------------- 0.00 0.00 1/1 [1] 0.0 0.00 0.00 1 x1 [1] 0.00 0.00 100/100 consumeCpu1 [0] ----------------------------------------------- 0.00 0.00 1000/1000 x2 [3] [2] 0.0 0.00 0.00 1000 consumeCpu2 [2] ----------------------------------------------- 0.00 0.00 1/1 [3] 0.0 0.00 0.00 1 x2 [3] 0.00 0.00 1000/1000 consumeCpu2 [2] ----------------------------------------------- "" ( main()). sprof -c : $ sprof -c libdemo.so.1 $LD_PROFILE_OUTPUT/libdemo.so.1.profile; x1 1 x1 consumeCpu1 100 x2 1 x2 consumeCpu2 1000 gprof(1), ldd(1), ld.so(8) 3 . . : . 6.18 8 2026 sprof(1)