forked from Imagelibrary/rtems
86ef0df976
The fat_file_datasync() read every cluster of the file into the cache and then synchronized it step-by-step. For unmodified buffers this is a non-operation. For modified buffers this will wake-up the swapout task which performs then a single buffer write operation. This is usually quite inefficient. Firstly we do single buffer writes, secondly we may perform a lot of unnecessary read operations (for huge files this is really bad), and thirdly this leads likely to cache evictions. The synchronization procedure is replaced by a simple rtems_bdbuf_sync_dev(). This has the side-effect that also buffers not related to the file are synchronized, but since the modified list is normally short this should be acceptable.
20 lines
560 B
Makefile
20 lines
560 B
Makefile
rtems_tests_PROGRAMS = fsdosfssync01
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fsdosfssync01_SOURCES = init.c
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dist_rtems_tests_DATA = fsdosfssync01.scn fsdosfssync01.doc
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include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP@.cfg
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include $(top_srcdir)/../automake/compile.am
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include $(top_srcdir)/../automake/leaf.am
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AM_CPPFLAGS += -I$(top_srcdir)/../support/include
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LINK_OBJS = $(fsdosfssync01_OBJECTS)
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LINK_LIBS = $(fsdosfssync01_LDLIBS)
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fsdosfssync01$(EXEEXT): $(fsdosfssync01_OBJECTS) $(fsdosfssync01_DEPENDENCIES)
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@rm -f fsdosfssync01$(EXEEXT)
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$(make-exe)
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include $(top_srcdir)/../automake/local.am
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