linux-kernel - Re : Re: [PATCH RESEND v3] bitmap: speed up bitmap_find_free

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Message-ID: <OF9884F33D.464250EE-ON49257B65.00056B4D-49257B65.00056B4F@lge.com>
Date:	Wed, 8 May 2013 09:59:11 +0900
From:	"Chanho Min" <chanho.min@....com>
To:	anish singh <anish198519851985@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Nadia Yvette Chambers <nyc@...omorphy.com>,
	Jiri Kosina <jkosina@...e.cz>, Joe Perches <joe@...ches.com>,
	linux-kernel-mail <linux-kernel@...r.kernel.org>
Subject: Re : Re: [PATCH RESEND v3] bitmap: speed up bitmap_find_free_region


>> Test case 1: order is 0. all bits are one except that last one bit is zero.
>>  before patch: 29727 ns
>>  after patch: 2349 ns
>How did you find out this time?Can  you please post your code
>for that?
I used local_clock(), But, It may be more proper way for each system.

 before = local_clock();
 bitmap_find_free_region(bitmap, 1024,0);
 after = local_clock();

Chanho Min,

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