projects
/
fio.git
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
|
inline
| side by side
Fix backwards reads with --size smaller than the file size
[fio.git]
/
lib
/
lfsr.c
diff --git
a/lib/lfsr.c
b/lib/lfsr.c
index 329ef85a8bf7a4e9529838c201482ee0eab78641..0c0072ccb39b15e970eeb6bd92342b67a85cd8bb 100644
(file)
--- a/
lib/lfsr.c
+++ b/
lib/lfsr.c
@@
-11,7
+11,7
@@
* The memory overhead of the following tap table should be relatively small,
* no more than 400 bytes.
*/
* The memory overhead of the following tap table should be relatively small,
* no more than 400 bytes.
*/
-static uint8_t taps[64][FIO_MAX_TAPS] =
+static uint8_t
lfsr_
taps[64][FIO_MAX_TAPS] =
{
{0}, {0}, {0}, //LFSRs with less that 3-bits cannot exist
{3, 2}, //Tap position for 3-bit LFSR
{
{0}, {0}, {0}, //LFSRs with less that 3-bits cannot exist
{3, 2}, //Tap position for 3-bit LFSR
@@
-124,7
+124,7
@@
static inline void __lfsr_next(struct fio_lfsr *fl, unsigned int spin)
* c. Check if the calculated value exceeds the desirable range. In this case,
* go back to b, else return.
*/
* c. Check if the calculated value exceeds the desirable range. In this case,
* go back to b, else return.
*/
-int lfsr_next(struct fio_lfsr *fl, uint64_t *off
, uint64_t last
)
+int lfsr_next(struct fio_lfsr *fl, uint64_t *off)
{
if (fl->num_vals++ > fl->max_val)
return 1;
{
if (fl->num_vals++ > fl->max_val)
return 1;
@@
-158,12
+158,12
@@
static uint8_t *find_lfsr(uint64_t size)
/*
* For an LFSR, there is always a prohibited state (all ones).
/*
* For an LFSR, there is always a prohibited state (all ones).
- * Thus, if we need to find the proper LFSR for our size, we must
take that
- * into account.
+ * Thus, if we need to find the proper LFSR for our size, we must
+ *
take that
into account.
*/
for (i = 3; i < 64; i++)
if ((1UL << i) > size)
*/
for (i = 3; i < 64; i++)
if ((1UL << i) > size)
- return taps[i];
+ return
lfsr_
taps[i];
return NULL;
}
return NULL;
}
@@
-234,15
+234,15
@@
int lfsr_reset(struct fio_lfsr *fl, unsigned long seed)
int lfsr_init(struct fio_lfsr *fl, uint64_t nums, unsigned long seed,
unsigned int spin)
{
int lfsr_init(struct fio_lfsr *fl, uint64_t nums, unsigned long seed,
unsigned int spin)
{
- uint8_t *
lfsr_
taps;
+ uint8_t *taps;
-
lfsr_
taps = find_lfsr(nums);
- if (!
lfsr_
taps)
+ taps = find_lfsr(nums);
+ if (!taps)
return 1;
fl->max_val = nums - 1;
return 1;
fl->max_val = nums - 1;
- fl->xormask = lfsr_create_xormask(
lfsr_
taps);
- fl->cached_bit = 1UL << (
lfsr_
taps[0] - 1);
+ fl->xormask = lfsr_create_xormask(taps);
+ fl->cached_bit = 1UL << (taps[0] - 1);
if (prepare_spin(fl, spin))
return 1;
if (prepare_spin(fl, spin))
return 1;