Pierrick Bouvier <[email protected]> writes:
> On 2/29/24 6:21 PM, Alex Bennée wrote:
>> Pierrick Bouvier <[email protected]> writes:
>>
>>> Signed-off-by: Pierrick Bouvier <[email protected]>
>> I did notice there is a discrepancy between what libisns and libb
>> report. The libb looks like an overcount so I wonder if there are some
>> instructions we are not picking up but I can't see where that would be.
>> ➜ ./qemu-hppa -plugin ./tests/plugin/libinsn.so -plugin
>> ./tests/plugin/libbb.so,inline=true -d plugin
>> ./tests/tcg/hppa-linux-user/sha512
>> 1..10
>> ok 1 - do_test(&tests[i])
>> ok 2 - do_test(&tests[i])
>> ok 3 - do_test(&tests[i])
>> ok 4 - do_test(&tests[i])
>> ok 5 - do_test(&tests[i])
>> ok 6 - do_test(&tests[i])
>> ok 7 - do_test(&tests[i])
>> ok 8 - do_test(&tests[i])
>> ok 9 - do_test(&tests[i])
>> ok 10 - do_test(&tests[i])
>> CPU0: bb's: 54282, insns: 775697
>> Total: bb's: 54282, insns: 775697
>> cpu 0 insns: 774827
>> total insns: 774827
>> Although weirdly maybe only an hppa thing. Richard?
>>
>
> Do you observe the exact same number if you run only one of the plugin?
>
> bb count number of instructions in an executed block, while insn
> effectively count every instructions ran.
> Maybe there is hppa specifity that makes some tb exit in the middle,
> thus executing less instructions than expected from bb count.
Almost certainly - I just wasn't sure what would do that on straight
line code. Probably some funky aspect of HPPA I'm not aware off ;-)
>
> I don't know how to reproduce this test. Did you run it from a
> specific docker env?
If you have docker enabled the "make check-tcg" will build and use a
container to build the test cases. If you are on debian you just need:
apt install gcc-hppa-linux-gnu libc6-dev-hppa-cross
and re-run configure.
>
>> ➜ ./qemu-aarch64 -plugin ./tests/plugin/libinsn.so -plugin
>> ./tests/plugin/libbb.so,inline=true -d plugin
>> ./tests/tcg/aarch64-linux-user/sha512
>> 1..10
>> ok 1 - do_test(&tests[i])
>> ok 2 - do_test(&tests[i])
>> ok 3 - do_test(&tests[i])
>> ok 4 - do_test(&tests[i])
>> ok 5 - do_test(&tests[i])
>> ok 6 - do_test(&tests[i])
>> ok 7 - do_test(&tests[i])
>> ok 8 - do_test(&tests[i])
>> ok 9 - do_test(&tests[i])
>> ok 10 - do_test(&tests[i])
>> CPU0: bb's: 41513, insns: 302671
>> Total: bb's: 41513, insns: 302671
>> cpu 0 insns: 302671
>> total insns: 302671
>> Anyway:
>> Reviewed-by: Alex Bennée <[email protected]>
>>
--
Alex Bennée
Virtualisation Tech Lead @ Linaro
