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linux/tools/testing/radix-tree
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Matthew Wilcox 6ce711f275 idr: Make 1-based IDRs more efficient 
About 20% of the IDR users in the kernel want the allocated IDs to start
at 1.  The implementation currently searches all the way down the left
hand side of the tree, finds no free ID other than ID 0, walks all the
way back up, and then all the way down again.  This patch 'rebases' the
ID so we fill the entire radix tree, rather than leave a gap at 0.

Chris Wilson says: "I did the quick hack of allocating index 0 of the
idr and that eradicated idr_get_free() from being at the top of the
profiles for the many-object stress tests. This improvement will be
much appreciated."

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
2018-02-06 16:41:29 -05:00
..
generated radix tree test suite: Remove obsolete CONFIG 2017-02-13 16:09:43 -05:00
linux radix tree test suite: Remove ARRAY_SIZE 2018-02-06 15:07:20 -05:00
.gitignore radix tree test suite: Add config option for map shift 2017-02-13 21:44:10 -05:00
benchmark.c radix tree test suite: Add performance test for radix_tree_join() 2017-03-07 13:18:21 -05:00
idr-test.c idr: Make 1-based IDRs more efficient 2018-02-06 16:41:29 -05:00
iteration_check.c radix tree test suite: Dial down verbosity with -v 2017-02-13 21:44:04 -05:00
linux.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
main.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
multiorder.c mm, truncate: do not check mapping for every page being truncated 2017-11-15 18:21:06 -08:00
regression1.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
regression2.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
regression3.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
regression.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tag_check.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
test.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
test.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00