validation-output.txt

Recorded output, shown exactly as saved. It describes the environment stated in the lesson, not a live run. Learn

Platform: Linux-6.18.44-x86_64-with-glibc2.39
Compiler: gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0

Assembly O0 (compiler-generated, architecture-specific):
	.file	"work.c"
	.text
	.globl	count_steps
	.type	count_steps, @function
count_steps:
.LFB0:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	movq	%rdi, -24(%rbp)
	movq	$0, -16(%rbp)
	movq	$0, -8(%rbp)
	jmp	.L2
.L3:
	addq	$1, -16(%rbp)
	addq	$1, -8(%rbp)
.L2:
	movq	-8(%rbp), %rax
	cmpq	-24(%rbp), %rax
	jb	.L3
	movq	-16(%rbp), %rax
	popq	%rbp
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE0:
	.size	count_steps, .-count_steps
	.ident	"GCC: (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:


Assembly O2 (compiler-generated, architecture-specific):
	.file	"work.c"
	.text
	.p2align 4
	.globl	count_steps
	.type	count_steps, @function
count_steps:
.LFB0:
	.cfi_startproc
	endbr64
	movq	%rdi, %rax
	ret
	.cfi_endproc
.LFE0:
	.size	count_steps, .-count_steps
	.ident	"GCC: (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:

Correctness and input checks: PASS
n=1000000 O0: samples=[0.000780211, 0.000759941, 0.000760522, 0.000975309, 0.000960637]; median=0.000780211s
n=1000000 O2: samples=[5.81e-07, 5.91e-07, 6.31e-07, 5.61e-07, 5.51e-07]; median=0.000000581s
n=10000000 O0: samples=[0.008073062, 0.008593068, 0.009258841, 0.012643219, 0.018248615]; median=0.009258841s
n=10000000 O2: samples=[5.51e-07, 5.21e-07, 6.71e-07, 5.41e-07, 6.91e-07]; median=0.000000551s
n=50000000 O0: samples=[0.043461666, 0.056457134, 0.046039398, 0.046196169, 0.048251973]; median=0.046196169s
n=50000000 O2: samples=[6.71e-07, 5.51e-07, 7.41e-07, 8.92e-07, 6.71e-07]; median=0.000000671s
No speed threshold is a pass condition; inspect assembly before explaining timing.