[OE-core] [PATCH 1/1] oeqa/concurrencytest: fix for locating meta-selftest

[Yang, Liezhi]

Hi RP,

Sorry, I am on vacation today, will do more investigations next week.

// Robert

Sent from mobile phone

> 在 2018年12月20日，23:06，Richard Purdie <richard.purdie at linuxfoundation.org> 写道：
> 
> On Thu, 2018-12-20 at 12:19 +0000, richard.purdie at linuxfoundation.org
> wrote:
>> On Thu, 2018-12-20 at 18:43 +0800, Robert Yang
>> wrote:                    bb.utils.mkdirhier(newbuilddir)
>> 
>> This broke on our autobuilder:
>> 
>> https://autobuilder.yoctoproject.org/typhoon/#/builders/56/builds/61
>> 
>> It basically creates a "stampeding herd" of bitbake startups as if
>> you
>> specify -j 40, it would do this 40 times nearly all at once and that
>> causes retry problems.
>> 
>> We need to move the call outside the for loop as the value doesn't
>> change.
> 
> I fixed the patch but it raises some questions about the way bitbake is
> behaving. I wrote a test script:
> 
> #!/usr/bin/env python3
> 
> import os
> import sys
> import subprocess
> 
> for i in range(50):
>    sys.stdout.flush()
>    sys.stderr.flush()
>    pid = os.fork()
>    if pid == 0:
>        ourpid = os.getpid()
>        print("Starting %s" % ourpid)
>        sys.stdout.flush()
>        newsi = os.open(os.devnull, os.O_RDWR)
>        os.dup2(newsi, sys.stdin.fileno())
>        try:
>            output = subprocess.check_output("bitbake -e bash | grep PN=", shell=True, stderr=subprocess.STDOUT).decode("utf-8")
>        except subprocess.CalledProcessError as e:
>            print("output: %s" % e.output.decode("utf-8"))
>            os._exit(e.returncode)
>        print("output: %s" % output)
>        os._exit(0)
> 
> which is a bit crazy shows some errors both on the console and in the
> bitbake-cookerdaemon log and shows that closing the UI connections when
> we have a client is not the right thing to be doing.
> 
> This may give some insight into some of the oe-selftest failures and
> I'm looking at how to improve this behaviour...
> 
> (added Chen Qi+Randy to cc as well)
> 
> Cheers,
> 
> Richard
> 
> 
> 
>