Gprof and g++ on Sparc 10

Question

Hello all,
I would like to ask a question regarding profiling with gprof on Sparc Solaris 10 using g++ as a compiler. I have written a small test program which compiles and runs fine, but when I look at the gprof output it reports "no time accumulated". When I run the same program with the same build commands on Linux Red Hat 4 gprof works just fine. Note that in both cases the program runs for at least a couple of seconds so I do not believe I hit the sub second threshold. Perhaps someone has an idea of what went wrong on Solaris?
Details follow:
My machine: [ sparcv9 1280 MHz ] x 2 running Solaris 10.
Compiler: g++ version 4.1.2
Profiling tool: gprof version 2.18
Building commands:
g++ -c -g -pg -m64 gprof_tester.cpp;
g++ -pg -m64 -o gprof_tester gprof_tester.o;
The program:
void a(){
for (long long i=0; i<1000; i++){
for (long long j=0; j<1000; j++) {
int x = 5;
int y = 3;
int z = x*y;
void b(){
for (long long i=0; i<1000; i++){
int x = 5;
int y = 3;
int z = x*y;
a();
int main(){
a();
b();
return 0;
On Sparc Solaris I get the following output from gprof:
Flat profile:
Each sample counts as 0.01 seconds.
no time accumulated
% cumulative self self total
time seconds seconds calls Ts/call Ts/call name
0.00 0.00 0.00 1001 0.00 0.00 a()
0.00 0.00 0.00 1 0.00 0.00 b()
0.00 0.00 0.00 1 0.00 0.00 main
On Red Hat Linux 4 I get the following output from gprof:
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls s/call s/call name
101.15 2.21 2.21 1001 0.00 0.00 a()
0.00 2.21 0.00 1 0.00 2.20 b()
Thanks in advance,
Shiry Ginosar
Software Engineer
Endeca

Answer 1

shiry wrote:
Hello all,
I would like to ask a question regarding profiling with gprof on Sparc Solaris 10 using g++ as a compiler.Then I'm afraid that this is the wrong place. This is for Sun Studio, not GCC. Try a GCC forum.
I get reasonable results:
gprof ./gprof_tester
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls s/call s/call name
100.15 12.09 12.09 1001 0.01 0.01 a()
0.00 12.09 0.00 1 0.00 12.08 b()
0.00 12.09 0.00 1 0.00 12.09 main
That's with GCC 4.0.2 and gprof 2.17 (both compiled inhouse).
Paul