Work in progress global dedupe changes.

crypto/crypto_utils.h

@@ -30,6 +30,8 @@
 #include <sys/types.h>
 #include <stdint.h>
 
+#include <utils.h>
+
 #ifdef	__cplusplus
 extern "C" {
 #endif
@@ -58,27 +60,6 @@ extern "C" {
 #define	MAX_NONCE		32
 
 #define	KECCAK_MAX_SEG	(2305843009213693950ULL)
-/*
- * Public checksum properties. CKSUM_MAX_BYTES must be updated if a
- * newer larger checksum is added to the list.
- */
-typedef enum {
-	CKSUM_CRC64 = 0x100,
-	CKSUM_BLAKE256 = 0x200,
-	CKSUM_BLAKE512 = 0x300,
-	CKSUM_SHA256 = 0x400,
-	CKSUM_SHA512 = 0x500,
-	CKSUM_KECCAK256 = 0x600,
-	CKSUM_KECCAK512 = 0x700,
-/*
- * Backwards compatibility options. SKEIN in release 1.2 was replaced with
- * Blake2 from 1.3 onwards (for sheer speed of Blake2). We want to be able
- * to decode archives created with 1.2. New archives do not use SKEIN.
- */
-	CKSUM_SKEIN256 = 0x800,
-	CKSUM_SKEIN512 = 0x900,
-	CKSUM_INVALID = 0
-} cksum_t;
 
 typedef struct {
 	void *crypto_ctx;

main.c

@@ -87,6 +87,7 @@ static int nthreads = 0;
 static int hide_mem_stats = 1;
 static int hide_cmp_stats = 1;
 static int enable_rabin_scan = 0;
+static int enable_rabin_global = 0;
 static int enable_delta_encode = 0;
 static int enable_delta2_encode = 0;
 static int enable_rabin_split = 1;
@@ -770,6 +771,15 @@ start_decompress(const char *filename, const char *to_filename)
 	if (flags & FLAG_DEDUP) {
 		enable_rabin_scan = 1;
 
+		if (flags & FLAG_DEDUP_FIXED) {
+			if (version > 7) {
+				enable_rabin_global = 1;
+			} else {
+				fprintf(stderr, "Invalid file deduplication flags.\n");
+				err = 1;
+				goto uncomp_done;
+			}
+		}
 	} else if (flags & FLAG_DEDUP_FIXED) {
 		enable_fixed_scan = 1;
 	}
@@ -1577,8 +1587,8 @@ start_compress(const char *filename, uint64_t chunksize, int level)
 	short version, flags;
 	struct stat sbuf;
 	int compfd = -1, uncompfd = -1, err;
-	int i, thread, bail, single_chunk;
+	int thread, bail, single_chunk;
-	int nprocs, np, p;
+	uint32_t i, nprocs, np, p;
 	struct cmp_data **dary = NULL, *tdat;
 	pthread_t writer_thr;
 	uchar_t *cread_buf, *pos;
@@ -1599,6 +1609,7 @@ start_compress(const char *filename, uint64_t chunksize, int level)
 	 */
 	compressed_chunksize = chunksize + CHUNK_HDR_SZ + zlib_buf_extra(chunksize);
 	init_algo_props(&props);
+	props.cksum = cksum;
 	cread_buf = NULL;
 
 	if (_props_func) {
@@ -1610,8 +1621,10 @@ start_compress(const char *filename, uint64_t chunksize, int level)
 	}
 
 	flags = 0;
-	if (enable_rabin_scan || enable_fixed_scan) {
+	if (enable_rabin_scan || enable_fixed_scan || enable_rabin_global) {
-		if (enable_rabin_scan)
+		if (enable_rabin_global)
+			flags |= (FLAG_DEDUP | FLAG_DEDUP_FIXED);
+		else if (enable_rabin_scan)
 			flags |= FLAG_DEDUP;
 		else
 			flags |= FLAG_DEDUP_FIXED;
@@ -1801,6 +1814,10 @@ start_compress(const char *filename, uint64_t chunksize, int level)
 		sem_init(&(tdat->start_sem), 0, 0);
 		sem_init(&(tdat->cmp_done_sem), 0, 0);
 		sem_init(&(tdat->write_done_sem), 0, 1);
+		sem_init(&(tdat->index_sem), 0, 0);
+
+		// i is unsigned so this wraps around backwards for i == 0
+		tdat->index_sem_other = &(dary[(i - 1) % nprocs]->index_sem);
 		if (_init_func) {
 			if (_init_func(&(tdat->data), &(tdat->level), props.nthreads, chunksize, VERSION, COMPRESS) != 0) {
 				COMP_BAIL;
@@ -1830,6 +1847,9 @@ start_compress(const char *filename, uint64_t chunksize, int level)
 	}
 	thread = 1;
 
+	// When doing global dedupe first thread does not wait to access the index.
+	sem_post(&(dary[0]->index_sem));
+
 	w.dary = dary;
 	w.wfd = compfd;
 	w.nprocs = nprocs;

pcompress.h

@@ -194,6 +194,8 @@ struct cmp_data {
 	sem_t start_sem;
 	sem_t cmp_done_sem;
 	sem_t write_done_sem;
+	sem_t index_sem;
+	sem_t *index_sem_other;
 	void *data;
 	pthread_t thr;
 	mac_ctx_t chunk_hmac;

rabin/global/db.c

@@ -42,7 +42,8 @@
  * Hashtable structures for in-memory index.
  */
 typedef struct _hash_entry {
-	uint64_t seg_offset;
+	uint64_t item_offset;
+	uint32_t item_size;
 	struct _hash_entry *next;
 	uchar_t cksum[1];
 } hash_entry_t;
@@ -53,7 +54,6 @@ typedef struct {
 
 typedef struct {
 	htab_t *list;
-	pthread_mutex_t *mlist;
 	uint64_t memlimit;
 	uint64_t memused;
 	int hash_entry_size, intervals, hash_slots;
@@ -91,8 +91,6 @@ static cleanup_indx(index_t *indx)
 			}
 			free(indx->list);
 		}
-		if (indx->mlist)
-			free(indx->mlist);
 		free(indx);
 	}
 }
@@ -153,7 +151,6 @@ init_global_db_s(char *path, char *tmppath, uint32_t chunksize, uint64_t user_ch
 
 		indx->memlimit = memlimit;
 		indx->list = (htab_t *)calloc(intervals, sizeof (htab_t));
-		indx->mlist = (pthread_mutex_t *)malloc(intervals * sizeof (pthread_mutex_t));
 		indx->hash_entry_size = hash_entry_size;
 		indx->intervals = intervals;
 		indx->hash_slots = hash_slots / intervals;
@@ -167,9 +164,9 @@ init_global_db_s(char *path, char *tmppath, uint32_t chunksize, uint64_t user_ch
 				return (NULL);
 			}
 			indx->memused += ((hash_slots / intervals) * (sizeof (hash_entry_t *)));
-			pthread_mutex_init(&(indx->mlist[i]), NULL);
 		}
 
+		if (pct_interval > 0) {
 			strcpy(cfg->rootdir, tmppath);
 			strcat(cfg->rootdir, "/.segXXXXXX");
 			cfg->seg_fd_w = mkstemp(cfg->rootdir);
@@ -185,6 +182,7 @@ init_global_db_s(char *path, char *tmppath, uint32_t chunksize, uint64_t user_ch
 			for (i = 0; i < nthreads; i++) {
 				cfg->seg_fd_r[i] = open(cfg->rootdir, O_RDONLY);
 			}
+		}
 		cfg->dbdata = indx;
 	}
 	return (cfg);
@@ -213,9 +211,12 @@ mycmp(uchar_t *a, uchar_t *b, int sz)
 	return (0);
 }
 
+/*
+ * Lookup and insert item if indicated. Not thread-safe by design.
+ */
 uint64_t
 db_lookup_insert_s(archive_config_t *cfg, uchar_t *sim_cksum, int interval,
-		   uint64_t seg_offset, int do_insert)
+		   uint64_t item_offset, uint32_t item_size, int do_insert)
 {
 	uint32_t htab_entry;
 	index_t *indx = (index_t *)(cfg->dbdata);
@@ -228,18 +229,25 @@ db_lookup_insert_s(archive_config_t *cfg, uchar_t *sim_cksum, int interval,
 	htab = indx->list[interval].tab;
 
 	pent = &(htab[htab_entry]);
-	pthread_mutex_lock(&(indx->mlist[interval]));
 	ent = htab[htab_entry];
+	if (cfg->pct_interval == 0) { // Single file global dedupe case
 		while (ent) {
-		if (mycmp(sim_cksum, ent->cksum, cfg->similarity_cksum_sz) == 0) {
+			if (mycmp(sim_cksum, ent->cksum, cfg->similarity_cksum_sz) == 0 &&
-			uint64_t off;
+			    ent->item_size == item_size) {
-			off = ent->seg_offset;
+				return (ent->item_offset);
-			pthread_mutex_unlock(&(indx->mlist[interval]));
-			return (off+1);
 			}
 			pent = &(ent->next);
 			ent = ent->next;
 		}
+	} else {
+		while (ent) {
+			if (mycmp(sim_cksum, ent->cksum, cfg->similarity_cksum_sz) == 0) {
+				return (ent->item_offset);
+			}
+			pent = &(ent->next);
+			ent = ent->next;
+		}
+	}
 	if (do_insert) {
 		if (indx->memused + indx->hash_entry_size >= indx->memlimit - (indx->hash_entry_size << 2)) {
 			ent = htab[htab_entry];
@@ -249,11 +257,11 @@ db_lookup_insert_s(archive_config_t *cfg, uchar_t *sim_cksum, int interval,
 			ent = (hash_entry_t *)malloc(indx->hash_entry_size);
 			indx->memused += indx->hash_entry_size;
 		}
-		ent->seg_offset = seg_offset;
+		ent->item_offset = item_offset;
+		ent->item_size = item_size;
 		ent->next = 0;
 		memcpy(ent->cksum, sim_cksum, cfg->similarity_cksum_sz);
 		*pent = ent;
 	}
-	pthread_mutex_unlock(&(indx->mlist[interval]));
 	return (0);
 }

rabin/global/db.h

@@ -37,7 +37,7 @@ archive_config_t *init_global_db_s(char *path, char *tmppath, uint32_t chunksize
 			cksum_t ck, cksum_t ck_sim, size_t file_sz, size_t memlimit,
 			int nthreads);
 uint64_t db_lookup_insert_s(archive_config_t *cfg, uchar_t *sim_cksum, int interval,
-		   uint64_t seg_offset, int do_insert);
+		   uint64_t item_offset, uint32_t item_size, int do_insert);
 
 #ifdef	__cplusplus
 }

rabin/rabin_dedup.c

@@ -128,7 +128,7 @@ dedupe_buf_extra(uint64_t chunksize, int rab_blk_sz, const char *algo, int delta
  */
 dedupe_context_t *
 create_dedupe_context(uint64_t chunksize, uint64_t real_chunksize, int rab_blk_sz,
-    const char *algo, const algo_props_t *props, int delta_flag, int fixed_flag,
+    const char *algo, const algo_props_t *props, int delta_flag, int dedupe_flag,
     int file_version, compress_op_t op) {
 	dedupe_context_t *ctx;
 	uint32_t i;
@@ -136,7 +136,7 @@ create_dedupe_context(uint64_t chunksize, uint64_t real_chunksize, int rab_blk_s
 	if (rab_blk_sz < 1 || rab_blk_sz > 5)
 		rab_blk_sz = RAB_BLK_DEFAULT;
 
-	if (fixed_flag) {
+	if (dedupe_flag == RABIN_DEDUPE_FIXED || dedupe_flag == RABIN_DEDUPE_FILE_GLOBAL) {
 		delta_flag = 0;
 		inited = 1;
 	}
@@ -196,7 +196,7 @@ create_dedupe_context(uint64_t chunksize, uint64_t real_chunksize, int rab_blk_s
 	ctx->rabin_poly_max_block_size = RAB_POLYNOMIAL_MAX_BLOCK_SIZE;
 
 	ctx->current_window_data = NULL;
-	ctx->fixed_flag = fixed_flag;
+	ctx->dedupe_flag = dedupe_flag;
 	ctx->rabin_break_patt = 0;
 	ctx->rabin_poly_avg_block_size = RAB_BLK_AVG_SZ(rab_blk_sz);
 	ctx->rabin_avg_block_mask = RAB_BLK_MASK;
@@ -220,7 +220,7 @@ create_dedupe_context(uint64_t chunksize, uint64_t real_chunksize, int rab_blk_s
 		ctx->delta_flag = 2;
 	}
 
-	if (!fixed_flag)
+	if (dedupe_flag != RABIN_DEDUPE_FIXED)
 		ctx->blknum = chunksize / ctx->rabin_poly_min_block_size;
 	else
 		ctx->blknum = chunksize / ctx->rabin_poly_avg_block_size;
@@ -330,7 +330,7 @@ dedupe_compress(dedupe_context_t *ctx, uchar_t *buf, uint64_t *size, uint64_t of
 	if (*size < ctx->rabin_poly_avg_block_size) return (0);
 	DEBUG_STAT_EN(strt = get_wtime_millis());
 
-	if (ctx->fixed_flag) {
+	if (ctx->dedupe_flag == RABIN_DEDUPE_FIXED) {
 		blknum = *size / ctx->rabin_poly_avg_block_size;
 		j = *size % ctx->rabin_poly_avg_block_size;
 		if (j)

rabin/rabin_dedup.h

@@ -118,6 +118,10 @@
 #define	GET_SIMILARITY_FLAG SET_SIMILARITY_FLAG
 #define	CLEAR_SIMILARITY_FLAG (0xBFFFFFFFUL)
 
+#define	RABIN_DEDUPE_SEGMENTED	0
+#define	RABIN_DEDUPE_FIXED	1
+#define	RABIN_DEDUPE_FILE_GLOBAL	2
+
 // Mask to extract value from a rabin index entry
 #define	RABIN_INDEX_VALUE (0x3FFFFFFFUL)
 
@@ -171,7 +175,7 @@ typedef struct {
 	uint64_t real_chunksize;
 	short valid;
 	void *lzma_data;
-	int level, delta_flag, fixed_flag, deltac_min_distance;
+	int level, delta_flag, dedupe_flag, deltac_min_distance;
 } dedupe_context_t;
 
 extern dedupe_context_t *create_dedupe_context(uint64_t chunksize, uint64_t real_chunksize, 

utils/utils.c

@@ -41,6 +41,8 @@
 #include <cpuid.h>
 #include <xxhash.h>
 
+#include <sys/sysinfo.h>
+
 #define _IN_UTILS_
 #include "utils.h"
 
@@ -367,3 +369,16 @@ get_mb_s(uint64_t bytes, double strt, double en)
 	bytes_sec = ((double)bytes / (en - strt)) * 1000;
 	return (BYTES_TO_MB(bytes_sec));
 }
+
+void
+get_sysinfo(my_sysinfo *msys_info)
+{
+	struct sysinfo sys_info;
+	sysinfo(&sys_info);
+
+	msys_info->totalram = sys_info.totalram;
+	msys_info->freeram = sys_info.freeram;
+	msys_info->totalswap = sys_info.totalswap;
+	msys_info->freeswap = sys_info.freeswap;
+	msys_info->mem_unit = sys_info.mem_unit;
+}

utils/utils.h

@@ -134,6 +134,28 @@ typedef int32_t bsize_t;
 
 #define	BYTES_TO_MB(x) ((x) / (1024 * 1024))
 
+/*
+ * Public checksum properties. CKSUM_MAX_BYTES must be updated if a
+ * newer larger checksum is added to the list.
+ */
+typedef enum {
+	CKSUM_CRC64 = 0x100,
+	CKSUM_BLAKE256 = 0x200,
+	CKSUM_BLAKE512 = 0x300,
+	CKSUM_SHA256 = 0x400,
+	CKSUM_SHA512 = 0x500,
+	CKSUM_KECCAK256 = 0x600,
+	CKSUM_KECCAK512 = 0x700,
+/*
+ * Backwards compatibility options. SKEIN in release 1.2 was replaced with
+ * Blake2 from 1.3 onwards (for sheer speed of Blake2). We want to be able
+ * to decode archives created with 1.2. New archives do not use SKEIN.
+ */
+	CKSUM_SKEIN256 = 0x800,
+	CKSUM_SKEIN512 = 0x900,
+	CKSUM_INVALID = 0
+} cksum_t;
+
 typedef enum {
 	COMPRESS_NONE = 0,
 	COMPRESS_LZFX,
@@ -155,6 +177,7 @@ typedef struct {
 	int d_max_threads;
 	int delta2_span;
 	int deltac_min_distance;
+	cksum_t cksum;
 } algo_props_t;
 
 typedef enum {
@@ -162,6 +185,14 @@ typedef enum {
 	DECOMPRESS_THREADS
 } algo_threads_type_t;
 
+typedef struct{
+	int64_t totalram;
+	int64_t freeram;
+	int64_t totalswap;
+	int64_t freeswap;
+	int64_t mem_unit;
+} my_sysinfo;
+
 #ifndef _IN_UTILS_
 extern processor_info_t proc_info;
 #endif
@@ -179,6 +210,7 @@ extern void set_threadcounts(algo_props_t *props, int *nthreads, int nprocs,
 extern uint64_t get_total_ram();
 extern double get_wtime_millis(void);
 extern double get_mb_s(uint64_t bytes, double strt, double en);
+extern void get_sysinfo(my_sysinfo *msys_info);
 extern void init_algo_props(algo_props_t *props);
 extern void init_pcompress();