On 6/19/23 19:34, Alex Bennée wrote:

Richard Henderson <richard.hender...@linaro.org> writes:

On 6/12/23 04:50, Richard Henderson wrote:
On 6/11/23 02:14, Alex Bennée wrote:

Richard Henderson <richard.hender...@linaro.org> writes:

This is a perfectly natural occurrence for x86 "rep movb",
where the "rep" prefix forms a counted loop of the one insn.

During the tests/tcg/multiarch/memory test, this logging is
triggered over 350000 times.  Within the context of cross-i386-tci
build, which is already slow by nature, the logging is sufficient
to push the test into timeout.

How does this get triggered because I added these:

# non-inline runs will trigger the duplicate instruction heuristics in 
libinsn.so
run-plugin-%-with-libinsn.so:
     $(call run-test, $@, \
       $(QEMU) -monitor none -display none \
           -chardev file$(COMMA)path=$@.out$(COMMA)id=output \
                    -plugin ../../plugin/libinsn.so$(COMMA)inline=on \
               -d plugin -D $*-with-libinsn.so.pout \
           $(QEMU_OPTS) $*)

to prevent the callback versions from being called for x86. The original
intent of the check was to detect failures due to cpu_io_recompile, see
e025d799af (tests/plugin: expand insn test to detect duplicate instructions)
I have no idea how, but it's happening.

Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
Irritatingly, it doesn't timeout locally, so I used staging to double-check:

Fail: https://gitlab.com/qemu-project/qemu/-/jobs/4450754282#L5062
Pass: https://gitlab.com/qemu-project/qemu/-/jobs/4450927108
Note that in the pass case, we don't even log that the test ran.

Any further thoughts on this?  Otherwise I'll merge it to get rid of
the cross-i386-tci failure...


r~

I'm happy to drop the feature from the plugin but the clean-up also
needs to be applied to the run-plugin-%-with-libinsn.so: rules for i386
and x86_64.

Pardon?  I don't know what you mean wrt changing the makefile.


r~

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