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From: Aaron Conole <aconole@redhat.com>
To: Thomas Monjalon <thomas@monjalon.net>
Cc: dev@dpdk.org, David Marchand <david.marchand@redhat.com>,
	anatoly.burakov@intel.com,
	Bruce Richardson <bruce.richardson@intel.com>
Subject: Re: [dpdk-dev] [PATCH] test: make hugepage check more robust under Linux
Date: Tue, 06 Apr 2021 08:33:07 -0400
Message-ID: <f7ta6qbr3ss.fsf@dhcp-25.97.bos.redhat.com> (raw)
In-Reply-To: <2080877.JXBMkDg2Jp@thomas> (Thomas Monjalon's message of "Wed, 17 Mar 2021 15:57:31 +0100")

Thomas Monjalon <thomas@monjalon.net> writes:

> 17/03/2021 15:44, Aaron Conole:
>> The hugepage test really needs to check multiple things on Linux:
>> 
>> 1. Are hugepages reserved in the system?
>> 
>> 2. Is the hugepage mountpoint available so that we can allocate them?
>> 
>> 3. Do we have permissions to write into the hugepage mountpoint?
>> 
>> The existing hugepage check only verifies the first.  On some setups,
>> a non-root user won't have access to the mountpoint for hugepages to
>> be allocated and that needs to be reflected in the test as well.  Add
>> such checks for Linux OS to give a more check when running test suites.
>
> Requirements 2 & 3 are optional.
> You don't need a mount point if using the option --in-memory.

That's true, but it seems to break a few of the unit tests without.
I'll clarify the commit message.

Additionally, I thought it would be simple to just incorporate your
suggestions - but it seems that meson / ninja doesn't have cascading
dependencies the way 'make' does (or, I haven't figured out from the
syntax how to do that) - a 'run_command' gets resolved at configure
time and it doesn't seem that we can make a run_target depend on another
run_target since dependencies are on file outputs.  Maybe we do some
kind of trickery here where we write a file that the build script reads?

I am trying to figure out how best to accomplish this - suggestions
welcome.

> [...]
>> +	perm=""
>
> perm= should do the same.
>
>> +	for mount in `mount | grep hugetlbfs | awk '{ print $3; }'`; do
>
> Please prefer $() syntax.

Okay

> Are spaces in awk required?

I'm not sure - I don't think so.

>> +		test ! -w $mount/. || perm="$mount"
>
> Why /. ?

Habit.  I will remove it.

>> +	done
>> +	if [ "$perm" = "" -o "$nr_hugepages" = "0" ]; then
>
> = "" can be replaced with -z
> "0" can be simply 0

Done.

>> +		echo 0
>> +	else
>> +		echo $nr_hugepages
>> +	fi


  reply	other threads:[~2021-04-06 12:33 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-17 14:44 Aaron Conole
2021-03-17 14:57 ` Thomas Monjalon
2021-04-06 12:33   ` Aaron Conole [this message]
2021-04-06 12:58     ` Bruce Richardson
2021-04-06 14:20       ` Aaron Conole
2021-04-06 14:50         ` Bruce Richardson
2021-04-09 15:06           ` Aaron Conole
2021-04-09 15:33             ` Thomas Monjalon
2021-04-12 11:33               ` David Marchand
2021-04-09 15:40             ` Bruce Richardson
2021-03-19 13:41 ` David Marchand
2021-03-19 14:34   ` Aaron Conole

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