Talk:Accelerometers - Revision history

sharpneli at 16:08, 18 January 2010

sharpneli — Mon, 18 Jan 2010 16:08:52 GMT

← Older revision		Revision as of 16:08, 18 January 2010
Line 2:		Line 2:

	1000 reads of values, parsing with scanf and writing to a file using repeated opening and closing of said file.		1000 reads of values, parsing with scanf and writing to a file using repeated opening and closing of said file.
		+
	real 0m 1.74s		real 0m 1.74s
	user 0m 0.09s		user 0m 0.09s
Line 8:		Line 9:

	1000 reads, parsing and writing by using rewind.		1000 reads, parsing and writing by using rewind.
		+
	real 0m 1.19s		real 0m 1.19s
	user 0m 0.02s		user 0m 0.02s
	sys 0m 0.10s		sys 0m 0.10s

-	This indicates that processor usage on applications with high fps and accelerometer usage could be lowered by using rewind instead of repeated fopen. Should this method of accessing the file be mentioned on the article? [[User:sharpneli\|sharpneli]] 15:45, 18 January 2010 (UTC)	+
		+	This indicates that processor usage on applications with high fps and accelerometer usage could be lowered by using rewind instead of repeated fopen. Should this method of accessing the file be mentioned on the article?
		+
		+	[[User:sharpneli\|sharpneli]] 15:45, 18 January 2010 (UTC)

sharpneli at 15:45, 18 January 2010

sharpneli — Mon, 18 Jan 2010 15:45:28 GMT

← Older revision		Revision as of 15:45, 18 January 2010
Line 12:		Line 12:
	sys 0m 0.10s		sys 0m 0.10s

-	This indicates that processor usage on applications with high fps and accelerometer usage could be lowered by using rewind instead of repeated fopen. Should this method of accessing the file be mentioned on the article?	+	This indicates that processor usage on applications with high fps and accelerometer usage could be lowered by using rewind instead of repeated fopen. Should this method of accessing the file be mentioned on the article? [[User:sharpneli\|sharpneli]] 15:45, 18 January 2010 (UTC)

sharpneli: New page: I performed simple timing measurements for using the repeated fopen compated to using rewind on the sysfs file (as sysfs files must be seeked to start or reopened to get new information) a...

sharpneli — Mon, 18 Jan 2010 15:44:51 GMT

New page: I performed simple timing measurements for using the repeated fopen compated to using rewind on the sysfs file (as sysfs files must be seeked to start or reopened to get new information) a...

New page

I performed simple timing measurements for using the repeated fopen compated to using rewind on the sysfs file (as sysfs files must be seeked to start or reopened to get new information) and they are as follows:

1000 reads of values, parsing with scanf and writing to a file using repeated opening and closing of said file.
real 0m 1.74s
user 0m 0.09s
sys 0m 0.57s

1000 reads, parsing and writing by using rewind.
real 0m 1.19s
user 0m 0.02s
sys 0m 0.10s

This indicates that processor usage on applications with high fps and accelerometer usage could be lowered by using rewind instead of repeated fopen. Should this method of accessing the file be mentioned on the article?