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Microoptimizations for VERIFY() and friends 

Add branch hints and constify the intermediate evaluations of 
left/right params in VERIFY3*().

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Adam Moss <c@yotes.com>
Closes #11708
This commit is contained in:
Adam D. Moss 2021-03-11 17:16:09 -08:00 committed by Tony Hutter
parent 6f349d33a5
commit 0d6186cff3
2 changed files with 79 additions and 79 deletions
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34
include/os/freebsd/spl/sys/debug.h
View File

@ -74,9 +74,9 @@ void spl_dumpstack(void);
"%s", "VERIFY(" #cond ") failed\n"))
#define VERIFY3B(LEFT, OP, RIGHT) do { \
boolean_t _verify3_left = (boolean_t)(LEFT); \
boolean_t _verify3_right = (boolean_t)(RIGHT); \
if (!(_verify3_left OP _verify3_right)) \
const boolean_t _verify3_left = (boolean_t)(LEFT); \
const boolean_t _verify3_right = (boolean_t)(RIGHT);\
if (unlikely(!(_verify3_left OP _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%d " #OP " %d)\n", \
@ -85,9 +85,9 @@ void spl_dumpstack(void);
} while (0)
#define VERIFY3S(LEFT, OP, RIGHT) do { \
int64_t _verify3_left = (int64_t)(LEFT); \
int64_t _verify3_right = (int64_t)(RIGHT); \
if (!(_verify3_left OP _verify3_right)) \
const int64_t _verify3_left = (int64_t)(LEFT); \
const int64_t _verify3_right = (int64_t)(RIGHT); \
if (unlikely(!(_verify3_left OP _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%lld " #OP " %lld)\n", \
@ -96,9 +96,9 @@ void spl_dumpstack(void);
} while (0)
#define VERIFY3U(LEFT, OP, RIGHT) do { \
uint64_t _verify3_left = (uint64_t)(LEFT); \
uint64_t _verify3_right = (uint64_t)(RIGHT); \
if (!(_verify3_left OP _verify3_right)) \
const uint64_t _verify3_left = (uint64_t)(LEFT); \
const uint64_t _verify3_right = (uint64_t)(RIGHT); \
if (unlikely(!(_verify3_left OP _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%llu " #OP " %llu)\n", \
@ -107,9 +107,9 @@ void spl_dumpstack(void);
} while (0)
#define VERIFY3P(LEFT, OP, RIGHT) do { \
uintptr_t _verify3_left = (uintptr_t)(LEFT); \
uintptr_t _verify3_right = (uintptr_t)(RIGHT); \
if (!(_verify3_left OP _verify3_right)) \
const uintptr_t _verify3_left = (uintptr_t)(LEFT); \
const uintptr_t _verify3_right = (uintptr_t)(RIGHT);\
if (unlikely(!(_verify3_left OP _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%px " #OP " %px)\n", \
@ -118,9 +118,9 @@ void spl_dumpstack(void);
} while (0)
#define VERIFY0(RIGHT) do { \
int64_t _verify3_left = (int64_t)(0); \
int64_t _verify3_right = (int64_t)(RIGHT); \
if (!(_verify3_left == _verify3_right)) \
const int64_t _verify3_left = (int64_t)(0); \
const int64_t _verify3_right = (int64_t)(RIGHT); \
if (unlikely(!(_verify3_left == _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(0 == " #RIGHT ") " \
"failed (0 == %lld)\n", \
@ -154,11 +154,11 @@ void spl_dumpstack(void);
#define ASSERT0 VERIFY0
#define ASSERT VERIFY
#define IMPLY(A, B) \
((void)(((!(A)) || (B)) || \
((void)(likely((!(A)) || (B)) || \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"(" #A ") implies (" #B ")")))
#define EQUIV(A, B) \
((void)((!!(A) == !!(B)) || \
((void)(likely(!!(A) == !!(B)) || \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"(" #A ") is equivalent to (" #B ")")))
/* END CSTYLED */

34
include/os/linux/spl/sys/debug.h
View File

@ -68,9 +68,9 @@ void spl_dumpstack(void);
"%s", "VERIFY(" #cond ") failed\n"))
#define VERIFY3B(LEFT, OP, RIGHT) do { \
boolean_t _verify3_left = (boolean_t)(LEFT); \
boolean_t _verify3_right = (boolean_t)(RIGHT); \
if (!(_verify3_left OP _verify3_right)) \
const boolean_t _verify3_left = (boolean_t)(LEFT); \
const boolean_t _verify3_right = (boolean_t)(RIGHT);\
if (unlikely(!(_verify3_left OP _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%d " #OP " %d)\n", \
@ -79,9 +79,9 @@ void spl_dumpstack(void);
} while (0)
#define VERIFY3S(LEFT, OP, RIGHT) do { \
int64_t _verify3_left = (int64_t)(LEFT); \
int64_t _verify3_right = (int64_t)(RIGHT); \
if (!(_verify3_left OP _verify3_right)) \
const int64_t _verify3_left = (int64_t)(LEFT); \
const int64_t _verify3_right = (int64_t)(RIGHT); \
if (unlikely(!(_verify3_left OP _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%lld " #OP " %lld)\n", \
@ -90,9 +90,9 @@ void spl_dumpstack(void);
} while (0)
#define VERIFY3U(LEFT, OP, RIGHT) do { \
uint64_t _verify3_left = (uint64_t)(LEFT); \
uint64_t _verify3_right = (uint64_t)(RIGHT); \
if (!(_verify3_left OP _verify3_right)) \
const uint64_t _verify3_left = (uint64_t)(LEFT); \
const uint64_t _verify3_right = (uint64_t)(RIGHT); \
if (unlikely(!(_verify3_left OP _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%llu " #OP " %llu)\n", \
@ -101,9 +101,9 @@ void spl_dumpstack(void);
} while (0)
#define VERIFY3P(LEFT, OP, RIGHT) do { \
uintptr_t _verify3_left = (uintptr_t)(LEFT); \
uintptr_t _verify3_right = (uintptr_t)(RIGHT); \
if (!(_verify3_left OP _verify3_right)) \
const uintptr_t _verify3_left = (uintptr_t)(LEFT); \
const uintptr_t _verify3_right = (uintptr_t)(RIGHT);\
if (unlikely(!(_verify3_left OP _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%px " #OP " %px)\n", \
@ -112,9 +112,9 @@ void spl_dumpstack(void);
} while (0)
#define VERIFY0(RIGHT) do { \
int64_t _verify3_left = (int64_t)(0); \
int64_t _verify3_right = (int64_t)(RIGHT); \
if (!(_verify3_left == _verify3_right)) \
const int64_t _verify3_left = (int64_t)(0); \
const int64_t _verify3_right = (int64_t)(RIGHT); \
if (unlikely(!(_verify3_left == _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(0 == " #RIGHT ") " \
"failed (0 == %lld)\n", \
@ -154,11 +154,11 @@ void spl_dumpstack(void);
#define ASSERT0 VERIFY0
#define ASSERT VERIFY
#define IMPLY(A, B) \
((void)(((!(A)) || (B)) || \
((void)(likely((!(A)) || (B)) || \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"(" #A ") implies (" #B ")")))
#define EQUIV(A, B) \
((void)((!!(A) == !!(B)) || \
((void)(likely(!!(A) == !!(B)) || \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"(" #A ") is equivalent to (" #B ")")))
/* END CSTYLED */