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Fletcher4: Incremental updates and ctx calculation

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Fixes ABI issues with fletcher4 code, adds support for
incremental updates, and adds ztest method for testing.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Gvozden Neskovic <neskovic@gmail.com>
Closes #5164
This commit is contained in:
Brian Behlendorf
2016-10-07 12:44:12 -07:00
committed by GitHub
parent 48f783de79 5bf703b8f3
commit 482cd9ee69
7 changed files with 436 additions and 206 deletions
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include/zfs_fletcher.h
+35 -3
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@@ -62,12 +62,43 @@ void fletcher_4_init(void);
void fletcher_4_fini(void);
/* Internal fletcher ctx */
typedef struct zfs_fletcher_sse {
uint64_t v[2] __attribute__((aligned(16)));
} zfs_fletcher_sse_t;
typedef struct zfs_fletcher_avx {
uint64_t v[4] __attribute__((aligned(32)));
} zfs_fletcher_avx_t;
typedef struct zfs_fletcher_avx512 {
uint64_t v[8] __attribute__((aligned(64)));
} zfs_fletcher_avx512_t;
typedef union fletcher_4_ctx {
zio_cksum_t scalar;
#if defined(HAVE_SSE2) || (defined(HAVE_SSE2) && defined(HAVE_SSSE3))
zfs_fletcher_sse_t sse[4];
#endif
#if defined(HAVE_AVX) && defined(HAVE_AVX2)
zfs_fletcher_avx_t avx[4];
#endif
#if defined(__x86_64) && defined(HAVE_AVX512F)
zfs_fletcher_avx512_t avx512[4];
#endif
} fletcher_4_ctx_t;
/*
* fletcher checksum struct
*/
typedef void (*fletcher_4_init_f)(zio_cksum_t *);
typedef void (*fletcher_4_fini_f)(zio_cksum_t *);
typedef void (*fletcher_4_compute_f)(const void *, uint64_t, zio_cksum_t *);
typedef void (*fletcher_4_init_f)(fletcher_4_ctx_t *);
typedef void (*fletcher_4_fini_f)(fletcher_4_ctx_t *, zio_cksum_t *);
typedef void (*fletcher_4_compute_f)(fletcher_4_ctx_t *,
const void *, uint64_t);
typedef struct fletcher_4_func {
fletcher_4_init_f init_native;
@@ -80,6 +111,7 @@ typedef struct fletcher_4_func {
const char *name;
} fletcher_4_ops_t;
#if defined(HAVE_SSE2)
extern const fletcher_4_ops_t fletcher_4_sse2_ops;
#endif