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* LVM2 ./WHATS_NEW_DM libdm/datastruct/bitset.c
@ 2010-04-19 21:10 agk
0 siblings, 0 replies; 3+ messages in thread
From: agk @ 2010-04-19 21:10 UTC (permalink / raw)
To: lvm-devel, lvm2-cvs
CVSROOT: /cvs/lvm2
Module name: LVM2
Changes by: agk@sourceware.org 2010-04-19 21:10:20
Modified files:
. : WHATS_NEW_DM
libdm/datastruct: bitset.c
Log message:
fix last commit
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/WHATS_NEW_DM.diff?cvsroot=lvm2&r1=1.357&r2=1.358
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/libdm/datastruct/bitset.c.diff?cvsroot=lvm2&r1=1.7&r2=1.8
--- LVM2/WHATS_NEW_DM 2010/04/19 17:17:55 1.357
+++ LVM2/WHATS_NEW_DM 2010/04/19 21:10:20 1.358
@@ -1,5 +1,6 @@
Version 1.02.47 -
=================================
+ Simplify dm_bitset_create.
Speed up dm_bit_get_next with ffs().
Version 1.02.46 - 14th April 2010
--- LVM2/libdm/datastruct/bitset.c 2010/04/19 21:08:32 1.7
+++ LVM2/libdm/datastruct/bitset.c 2010/04/19 21:10:20 1.8
@@ -27,7 +27,7 @@
if (mem)
bs = dm_pool_zalloc(mem, size);
else if ((bs = dm_malloc(size)))
- memset(mem, 0, size);
+ memset(bs, 0, size);
if (!bs)
return NULL;
^ permalink raw reply [flat|nested] 3+ messages in thread
* LVM2 ./WHATS_NEW_DM libdm/datastruct/bitset.c
@ 2010-04-19 21:23 agk
0 siblings, 0 replies; 3+ messages in thread
From: agk @ 2010-04-19 21:23 UTC (permalink / raw)
To: lvm-devel, lvm2-cvs
CVSROOT: /cvs/lvm2
Module name: LVM2
Changes by: agk@sourceware.org 2010-04-19 21:23:02
Modified files:
. : WHATS_NEW_DM
libdm/datastruct: bitset.c
Log message:
Add dm_bit_and. (ejt)
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/WHATS_NEW_DM.diff?cvsroot=lvm2&r1=1.358&r2=1.359
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/libdm/datastruct/bitset.c.diff?cvsroot=lvm2&r1=1.8&r2=1.9
--- LVM2/WHATS_NEW_DM 2010/04/19 21:10:20 1.358
+++ LVM2/WHATS_NEW_DM 2010/04/19 21:23:01 1.359
@@ -1,5 +1,6 @@
Version 1.02.47 -
=================================
+ Add dm_bit_and.
Simplify dm_bitset_create.
Speed up dm_bit_get_next with ffs().
--- LVM2/libdm/datastruct/bitset.c 2010/04/19 21:10:20 1.8
+++ LVM2/libdm/datastruct/bitset.c 2010/04/19 21:23:02 1.9
@@ -42,6 +42,13 @@
dm_free(bs);
}
+void dm_bit_and(dm_bitset_t out, dm_bitset_t in1, dm_bitset_t in2)
+{
+ int i;
+
+ for (i = (in1[0] / DM_BITS_PER_INT) + 1; i; i--)
+ out[i] = in1[i] & in2[i];
+}
void dm_bit_union(dm_bitset_t out, dm_bitset_t in1, dm_bitset_t in2)
{
int i;
^ permalink raw reply [flat|nested] 3+ messages in thread
* LVM2 ./WHATS_NEW_DM libdm/datastruct/bitset.c
@ 2010-04-19 17:17 agk
0 siblings, 0 replies; 3+ messages in thread
From: agk @ 2010-04-19 17:17 UTC (permalink / raw)
To: lvm-devel, lvm2-cvs
CVSROOT: /cvs/lvm2
Module name: LVM2
Changes by: agk@sourceware.org 2010-04-19 17:17:55
Modified files:
. : WHATS_NEW_DM
libdm/datastruct: bitset.c
Log message:
Speed up dm_bit_get_next with ffs().
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/WHATS_NEW_DM.diff?cvsroot=lvm2&r1=1.356&r2=1.357
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/libdm/datastruct/bitset.c.diff?cvsroot=lvm2&r1=1.5&r2=1.6
--- LVM2/WHATS_NEW_DM 2010/04/14 21:47:48 1.356
+++ LVM2/WHATS_NEW_DM 2010/04/19 17:17:55 1.357
@@ -1,5 +1,6 @@
Version 1.02.47 -
=================================
+ Speed up dm_bit_get_next with ffs().
Version 1.02.46 - 14th April 2010
=================================
--- LVM2/libdm/datastruct/bitset.c 2008/11/03 18:59:59 1.5
+++ LVM2/libdm/datastruct/bitset.c 2010/04/19 17:17:55 1.6
@@ -52,18 +52,11 @@
out[i] = in1[i] | in2[i];
}
-/*
- * FIXME: slow
- */
-static inline int _test_word(uint32_t test, int bit)
+static int _test_word(uint32_t test, int bit)
{
- while (bit < (int) DM_BITS_PER_INT) {
- if (test & (0x1 << bit))
- return bit;
- bit++;
- }
+ int next_set_bit;
- return -1;
+ return ((next_set_bit = ffs(test >> bit)) ? next_set_bit + bit - 1 : -1);
}
int dm_bit_get_next(dm_bitset_t bs, int last_bit)
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2010-04-19 21:23 UTC | newest]
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