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add thread local storage to ecc fp cache, no locking required but cache is per thread, higher conncurrent performance but more memory needed

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This commit is contained in:
toddouska
2013-11-11 17:00:35 -08:00
parent 3e072c8dda
commit 0ef44329ef
4 changed files with 118 additions and 11 deletions
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39
ctaocrypt/src/ecc.c
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@@ -2144,17 +2144,22 @@ int ecc_sig_size(ecc_key* key)
/** Our FP cache */
static struct {
typedef struct {
ecc_point* g; /* cached COPY of base point */
ecc_point* LUT[1U<<FP_LUT]; /* fixed point lookup */
mp_int mu; /* copy of the montgomery constant */
int lru_count; /* amount of times this entry has been used */
int lock; /* flag to indicate cache eviction */
/* permitted (0) or not (1) */
} fp_cache[FP_ENTRIES];
} fp_cache_t;
static volatile int initMutex = 0; /* prevent multiple mutex inits */
static CyaSSL_Mutex ecc_fp_lock;
/* if HAVE_THREAD_LS this cache is per thread, no locking needed */
static THREAD_LS_T fp_cache_t fp_cache[FP_ENTRIES];
#ifndef HAVE_THREAD_LS
static volatile int initMutex = 0; /* prevent multiple mutex inits */
static CyaSSL_Mutex ecc_fp_lock;
#endif /* HAVE_THREAD_LS */
/* simple table to help direct the generation of the LUT */
static const struct {
@@ -3267,17 +3272,18 @@ int ecc_mul2add(ecc_point* A, mp_int* kA,
mp_digit mp;
mp_int mu;
if (initMutex == 0) {
InitMutex(&ecc_fp_lock);
initMutex = 1;
}
err = mp_init(&mu);
if (err != MP_OKAY)
return err;
#ifndef HAVE_THREAD_LS
if (initMutex == 0) {
InitMutex(&ecc_fp_lock);
initMutex = 1;
}
if (LockMutex(&ecc_fp_lock) != 0)
return BAD_MUTEX_E;
#endif /* HAVE_THREAD_LS */
/* find point */
idx1 = find_base(A);
@@ -3362,7 +3368,9 @@ int ecc_mul2add(ecc_point* A, mp_int* kA,
}
}
#ifndef HAVE_THREAD_LS
UnLockMutex(&ecc_fp_lock);
#endif /* HAVE_THREAD_LS */
mp_clear(&mu);
return err;
@@ -3389,6 +3397,7 @@ int ecc_mulmod(mp_int* k, ecc_point *G, ecc_point *R, mp_int* modulus,
if (mp_init(&mu) != MP_OKAY)
return MP_INIT_E;
#ifndef HAVE_THREAD_LS
if (initMutex == 0) {
InitMutex(&ecc_fp_lock);
initMutex = 1;
@@ -3396,6 +3405,7 @@ int ecc_mulmod(mp_int* k, ecc_point *G, ecc_point *R, mp_int* modulus,
if (LockMutex(&ecc_fp_lock) != 0)
return BAD_MUTEX_E;
#endif /* HAVE_THREAD_LS */
/* find point */
idx = find_base(G);
@@ -3445,7 +3455,9 @@ int ecc_mulmod(mp_int* k, ecc_point *G, ecc_point *R, mp_int* modulus,
}
}
#ifndef HAVE_THREAD_LS
UnLockMutex(&ecc_fp_lock);
#endif /* HAVE_THREAD_LS */
mp_clear(&mu);
return err;
@@ -3474,18 +3486,23 @@ static void ecc_fp_free_cache(void)
/** Free the Fixed Point cache */
void ecc_fp_free(void)
{
#ifndef HAVE_THREAD_LS
if (initMutex == 0) {
InitMutex(&ecc_fp_lock);
initMutex = 1;
}
if (LockMutex(&ecc_fp_lock) == 0) {
ecc_fp_free_cache();
UnLockMutex(&ecc_fp_lock);
#endif /* HAVE_THREAD_LS */
ecc_fp_free_cache();
#ifndef HAVE_THREAD_LS
UnLockMutex(&ecc_fp_lock);
FreeMutex(&ecc_fp_lock);
initMutex = 0;
}
#endif /* HAVE_THREAD_LS */
}