Why does cuobjdump -sass show NOPs at the end of a cubin file?

Accelerated Computing CUDA CUDA NVCC Compiler
#1

I’m curious why cuobjdump -sass my.cubin shows a bunch of NOPs at the end of the code.

<snip>
        /*00d0*/                   FADD R9, R4, R3 ;                             /* 0x0000000304097221 */
                                                                                 /* 0x004fd00000000000 */
        /*00e0*/                   STG.E.SYS [R6], R9 ;                          /* 0x0000000906007386 */
                                                                                 /* 0x000fe2000010e900 */
        /*00f0*/                   EXIT ;                                        /* 0x000000000000794d */
                                                                                 /* 0x000fea0003800000 */
        /*0100*/                   BRA 0x100;                                    /* 0xfffffff000007947 */
                                                                                 /* 0x000fc0000383ffff */
        /*0110*/                   NOP;                                          /* 0x0000000000007918 */
                                                                                 /* 0x000fc00000000000 */
        /*0120*/                   NOP;                                          /* 0x0000000000007918 */
                                                                                 /* 0x000fc00000000000 */
        /*0130*/                   NOP;                                          /* 0x0000000000007918 */
                                                                                 /* 0x000fc00000000000 */
        /*0140*/                   NOP;                                          /* 0x0000000000007918 */
                                                                                 /* 0x000fc00000000000 */
        /*0150*/                   NOP;                                          /* 0x0000000000007918 */
                                                                                 /* 0x000fc00000000000 */
        /*0160*/                   NOP;                                          /* 0x0000000000007918 */
                                                                                 /* 0x000fc00000000000 */
        /*0170*/                   NOP;                                          /* 0x0000000000007918 */
                                                                                 /* 0x000fc00000000000 */
                ..........

This matches the documentation for the example of cuobjdump: CUDA Binary Utilities :: CUDA Toolkit Documentation

However disassembling with nvdisasm my.cubin appears to end exactly at the final break instruction.

<snip>
        /*00d0*/                   FADD R9, R4, R3 ;
        /*00e0*/                   STG.E.SYS [R6], R9 ;
        /*00f0*/                   EXIT ;
.L_1:
        /*0100*/                   BRA `(.L_1);
.L_28:

For reference I’m trying this all using the simple “vectorAdd” sample included with the CUDA examples.

#2

Hi dear customer ,
Could you please file us a ticket following the instruction here Getting Help with CUDA NVCC Compiler - #3 we will take a further look .Thanks .