From: Derrick Stolee <stolee@gmail.com>
Date: Thu, 11 Oct 2018 11:00:29 GMT
Subject: Re: [RFC PATCH 6/6] commit-reach: fix first-parent heuristic
Message-ID: <58d2959a-ffb1-13ba-26f1-84fc2953fcc3@gmail.com>
In-Reply-To: <20181011015007.GA40329@aiede.svl.corp.google.com>

On 10/10/2018 9:50 PM, Jonathan Nieder wrote:
> Hi,
>
> Derrick Stolee wrote:
>
>>   commit-reach.c        | 4 +++-
>>   t/t6600-test-reach.sh | 2 +-
>>   2 files changed, 4 insertions(+), 2 deletions(-)
> I like this testing technique, and the test passes for me.
>
> Except: if I put
>
> 	CC = cc -m32
> 	NO_OPENSSL = YesPlease
> 	NO_CURL = YesPlease
>
> in config.mak (the first line to force 32-bit pointers, the others
> to avoid some dependencies on libs that I don't have 32-bit versions
> of), then the test fails for me:
>
>   $ ./t6600-test-reach.sh -v -x -i
>   [...]
>   expecting success:
>           cp commit-graph-full .git/objects/info/commit-graph &&
>           run_and_check_trace2 can_all_from_reach_with_flag num_walked 19 input \
>                   "test-tool reach can_all_from_reach"
>
>   ++ cp commit-graph-full .git/objects/info/commit-graph
>   ++ run_and_check_trace2 can_all_from_reach_with_flag num_walked 19 input 'test-tool reach can_all_from_r
>   each'
>   ++ CATEGORY=can_all_from_reach_with_flag
>   ++ KEY=num_walked
>   ++ VALUE=19
>   ++ INPUT=input
>   ++ COMMAND='test-tool reach can_all_from_reach'
>   +++ pwd
>   ++ GIT_TR2_PERFORMANCE='/usr/local/google/home/jrn/src/git/t/trash directory.t6600-test-reach/perf-log.t
>   xt'
>   ++ test-tool reach can_all_from_reach
>   can_all_from_reach(X,Y):1
>   ++ cat perf-log.txt
>   ++ grep 'category:can_all_from_reach_with_flag key:num_walked value:19'
>   error: last command exited with $?=1
>   not ok 11 - can_all_from_reach:perf
>   #
>   #               cp commit-graph-full .git/objects/info/commit-graph &&
>   #               run_and_check_trace2 can_all_from_reach_with_flag num_walked 19 input \
>   #                       "test-tool reach can_all_from_reach"
>   #
>
> When I cat perf-log.txt, I see
>
>    ..category:can_all_from_reach_with_flag key:num_walked value:20
>
> instead of the expected 19.
It is possible this is related to the sort-order problem reported and 
fixed by Rene [1]. I'll look into it in any case.

[1] 
https://public-inbox.org/git/dca35e44-a763-bcf0-f457-b8dab53815cf@web.de/