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Re: BufferPainter::Clear() optimization [message #53975 is a reply to message #53972]

Mon, 18 May 2020 21:56

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

Tom1 wrote on Mon, 18 May 2020 20:57

Hi,

My CPU here is Intel(R) Core(TM) i7-4790K:

https://ark.intel.com/content/www/us/en/ark/products/80807/i ntel-core-i7-4790k-processor-8m-cache-up-to-4-40-ghz.html

Not surprisingly, they say it has an 8M 'smart cache'.

Please find attached two CSV files portraying execution time in ns for each call in average. The length is in dwords. Fill3a is there for reference and Fill3T is using 64 dword threshold for streaming in one and 2M dword (8MB) threshold in the other file. While not portrayed here, increasing the threshold above 32MB decreases the performance from 1.5 ms to 3.6 ms for a 32 MB buffer.

Best regards,

Tom

If I interpret these numbers correctly, it looks like around 4MB potential drop because of cache bypass starts to be diminish, right?

Thing is, I am afraid that making this dynamic will cause a lot of problems, starting with perfromance - it is after all another read from the memory. I would settle for some compromise constant there. Like 4MB... Smile

Mirek

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[Message index]

		SSE2 and SVO optimization (Painter, memcpy....) By: Tom1 on Mon, 27 April 2020 19:19
		Re: BufferPainter::Clear() optimization By: mirek on Tue, 28 April 2020 10:12
		Re: BufferPainter::Clear() optimization By: mirek on Tue, 28 April 2020 10:20
		Re: BufferPainter::Clear() optimization By: Tom1 on Tue, 28 April 2020 10:27
		Re: BufferPainter::Clear() optimization By: mirek on Tue, 28 April 2020 10:33
		Re: BufferPainter::Clear() optimization By: mirek on Tue, 28 April 2020 11:10
		Re: BufferPainter::Clear() optimization By: Oblivion on Tue, 28 April 2020 11:27
		Re: BufferPainter::Clear() optimization By: Tom1 on Tue, 28 April 2020 11:17
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 15 May 2020 09:04
		Re: BufferPainter::Clear() optimization By: Tom1 on Fri, 15 May 2020 10:18
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 15 May 2020 11:33
		Re: BufferPainter::Clear() optimization By: Tom1 on Fri, 15 May 2020 11:41
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 15 May 2020 11:47
		Re: BufferPainter::Clear() optimization By: Tom1 on Fri, 15 May 2020 12:08
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 15 May 2020 13:15
		Re: BufferPainter::Clear() optimization By: Tom1 on Fri, 15 May 2020 13:36
		Re: BufferPainter::Clear() optimization By: Tom1 on Fri, 15 May 2020 23:13
		Re: BufferPainter::Clear() optimization By: Didier on Fri, 15 May 2020 23:45
		Re: BufferPainter::Clear() optimization By: Tom1 on Sat, 16 May 2020 01:59
		Re: BufferPainter::Clear() optimization By: mirek on Sun, 17 May 2020 08:47
		Re: BufferPainter::Clear() optimization By: Tom1 on Sun, 17 May 2020 10:01
		Re: BufferPainter::Clear() optimization By: mirek on Sun, 17 May 2020 15:49
		Re: BufferPainter::Clear() optimization By: mirek on Sun, 17 May 2020 18:05
		Re: BufferPainter::Clear() optimization By: Tom1 on Sun, 17 May 2020 20:56
		Re: BufferPainter::Clear() optimization By: Tom1 on Sun, 17 May 2020 21:46
		Re: BufferPainter::Clear() optimization By: Tom1 on Sun, 17 May 2020 23:25
		Re: BufferPainter::Clear() optimization By: mirek on Mon, 18 May 2020 10:16
		Re: BufferPainter::Clear() optimization By: Tom1 on Mon, 18 May 2020 11:13
		Re: BufferPainter::Clear() optimization By: Tom1 on Mon, 18 May 2020 13:31
		Re: BufferPainter::Clear() optimization By: mirek on Mon, 18 May 2020 13:53
		Re: BufferPainter::Clear() optimization By: Tom1 on Mon, 18 May 2020 16:06
		Re: BufferPainter::Clear() optimization By: Tom1 on Mon, 18 May 2020 17:08
		Re: BufferPainter::Clear() optimization By: mirek on Mon, 18 May 2020 18:12
		Re: BufferPainter::Clear() optimization By: mirek on Mon, 18 May 2020 18:28
		Re: BufferPainter::Clear() optimization By: Tom1 on Mon, 18 May 2020 20:57
		Re: BufferPainter::Clear() optimization By: Tom1 on Mon, 18 May 2020 21:20
		Re: BufferPainter::Clear() optimization By: Tom1 on Mon, 18 May 2020 21:40
		Re: BufferPainter::Clear() optimization By: mirek on Mon, 18 May 2020 21:56
		Re: BufferPainter::Clear() optimization By: mirek on Mon, 18 May 2020 13:33
		Re: BufferPainter::Clear() optimization By: Tom1 on Sun, 17 May 2020 00:10
		Re: BufferPainter::Clear() optimization By: Oblivion on Fri, 15 May 2020 12:16
		Re: BufferPainter::Clear() optimization By: Tom1 on Fri, 15 May 2020 12:28
		Re: BufferPainter::Clear() optimization By: Oblivion on Sun, 17 May 2020 22:00
		Re: BufferPainter::Clear() optimization By: mirek on Mon, 18 May 2020 13:43
		Re: BufferPainter::Clear() optimization By: mirek on Tue, 19 May 2020 00:02
		Re: BufferPainter::Clear() optimization By: Tom1 on Tue, 19 May 2020 08:59
		Re: BufferPainter::Clear() optimization By: mirek on Tue, 19 May 2020 09:14
		Re: BufferPainter::Clear() optimization By: mirek on Tue, 19 May 2020 09:49
		Re: BufferPainter::Clear() optimization By: Tom1 on Tue, 19 May 2020 12:35
		Re: BufferPainter::Clear() optimization By: mirek on Tue, 19 May 2020 12:45
		Re: BufferPainter::Clear() optimization By: Tom1 on Tue, 19 May 2020 13:18
		Re: BufferPainter::Clear() optimization By: Tom1 on Tue, 19 May 2020 16:22
		Re: BufferPainter::Clear() optimization By: Tom1 on Wed, 20 May 2020 01:34
		Re: BufferPainter::Clear() optimization By: mirek on Wed, 20 May 2020 01:52
		Re: BufferPainter::Clear() optimization By: Tom1 on Wed, 20 May 2020 08:22
		Re: BufferPainter::Clear() optimization By: Tom1 on Wed, 20 May 2020 10:04
		Re: BufferPainter::Clear() optimization By: mirek on Wed, 20 May 2020 10:20
		Re: BufferPainter::Clear() optimization By: Tom1 on Wed, 20 May 2020 10:55
		Re: BufferPainter::Clear() optimization By: mirek on Wed, 20 May 2020 11:56
		Re: BufferPainter::Clear() optimization By: mirek on Wed, 20 May 2020 12:23
		Re: BufferPainter::Clear() optimization By: Tom1 on Wed, 20 May 2020 12:41
		Re: BufferPainter::Clear() optimization By: mirek on Wed, 20 May 2020 12:53
		Re: BufferPainter::Clear() optimization By: Tom1 on Wed, 20 May 2020 13:01
		Re: BufferPainter::Clear() optimization By: mirek on Wed, 20 May 2020 15:18
		Re: BufferPainter::Clear() optimization By: Tom1 on Thu, 21 May 2020 16:21
		Re: BufferPainter::Clear() optimization By: mirek on Wed, 20 May 2020 15:58
		Re: BufferPainter::Clear() optimization By: Tom1 on Wed, 20 May 2020 16:15
		Re: BufferPainter::Clear() optimization By: mirek on Wed, 20 May 2020 17:16
		Re: BufferPainter::Clear() optimization By: mirek on Wed, 20 May 2020 17:31
		Re: BufferPainter::Clear() optimization By: mirek on Wed, 20 May 2020 17:37
		Re: BufferPainter::Clear() optimization By: Tom1 on Wed, 20 May 2020 19:51
		Re: BufferPainter::Clear() optimization By: mirek on Thu, 21 May 2020 09:04
		Re: BufferPainter::Clear() optimization By: mirek on Thu, 21 May 2020 13:28
		Re: BufferPainter::Clear() optimization By: Tom1 on Thu, 21 May 2020 16:38
		Re: BufferPainter::Clear() optimization By: koldo on Thu, 21 May 2020 17:51
		Re: BufferPainter::Clear() optimization By: Tom1 on Thu, 21 May 2020 19:22
		Re: BufferPainter::Clear() optimization By: Tom1 on Thu, 21 May 2020 19:25
		Re: BufferPainter::Clear() optimization By: Didier on Fri, 22 May 2020 09:32
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 22 May 2020 10:04
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 22 May 2020 10:05
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 22 May 2020 10:28
		Re: BufferPainter::Clear() optimization By: Tom1 on Fri, 22 May 2020 11:13
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 22 May 2020 11:39
		Re: BufferPainter::Clear() optimization By: Tom1 on Fri, 22 May 2020 11:46
		Re: BufferPainter::Clear() optimization By: Tom1 on Fri, 22 May 2020 11:59
		Re: BufferPainter::Clear() optimization By: koldo on Fri, 22 May 2020 12:47
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 22 May 2020 13:01
		Re: BufferPainter::Clear() optimization By: Tom1 on Fri, 22 May 2020 13:06
		Re: BufferPainter::Clear() optimization By: koldo on Fri, 22 May 2020 16:58
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 22 May 2020 19:03
		Re: BufferPainter::Clear() optimization By: mirek on Sun, 24 May 2020 10:20
		Re: BufferPainter::Clear() optimization By: Oblivion on Sun, 24 May 2020 11:56
		Re: BufferPainter::Clear() optimization By: Tom1 on Tue, 26 May 2020 13:14
		Re: BufferPainter::Clear() optimization By: mirek on Tue, 26 May 2020 14:15
		Re: BufferPainter::Clear() optimization By: mirek on Mon, 01 June 2020 00:39
		Re: BufferPainter::Clear() optimization By: omari on Mon, 01 June 2020 11:24
		Re: BufferPainter::Clear() optimization By: mirek on Mon, 01 June 2020 15:47
		Re: BufferPainter::Clear() optimization By: Tom1 on Tue, 02 June 2020 13:59
		Re: BufferPainter::Clear() optimization By: mirek on Tue, 02 June 2020 17:43
		Re: BufferPainter::Clear() optimization By: Tom1 on Tue, 02 June 2020 18:31
		Re: BufferPainter::Clear() optimization By: mirek on Thu, 04 June 2020 17:23
		Re: BufferPainter::Clear() optimization By: mirek on Thu, 04 June 2020 17:45
		Re: BufferPainter::Clear() optimization By: Novo on Thu, 04 June 2020 18:07
		Re: BufferPainter::Clear() optimization By: mirek on Thu, 04 June 2020 20:20
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 12 June 2020 12:23
		Re: BufferPainter::Clear() optimization By: Tom1 on Fri, 12 June 2020 12:55
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 12 June 2020 16:28
		Re: BufferPainter::Clear() optimization By: Novo on Fri, 12 June 2020 18:45
		Re: BufferPainter::Clear() optimization By: mirek on Sat, 13 June 2020 10:15
		Re: BufferPainter::Clear() optimization By: coolman on Sat, 13 June 2020 10:33
		Re: BufferPainter::Clear() optimization By: Novo on Sat, 13 June 2020 13:07
		Re: BufferPainter::Clear() optimization By: coolman on Sat, 13 June 2020 14:45
		Re: BufferPainter::Clear() optimization By: Didier on Sun, 14 June 2020 12:45
		Re: BufferPainter::Clear() optimization By: mirek on Sun, 14 June 2020 14:09
		Re: BufferPainter::Clear() optimization By: Tom1 on Thu, 04 June 2020 18:48
		Re: BufferPainter::Clear() optimization By: koldo on Fri, 22 May 2020 10:29
		Re: BufferPainter::Clear() optimization By: mirek on Fri, 22 May 2020 11:32
		Re: BufferPainter::Clear() optimization By: Tom1 on Fri, 22 May 2020 11:32
		Re: BufferPainter::Clear() optimization By: Tom1 on Wed, 20 May 2020 12:52
		Re: BufferPainter::Clear() optimization By: mirek on Tue, 19 May 2020 11:32

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