diff options
Diffstat (limited to '')
| -rw-r--r-- | tests/modules/defragtest.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/tests/modules/defragtest.c b/tests/modules/defragtest.c new file mode 100644 index 0000000..6a02a05 --- /dev/null +++ b/tests/modules/defragtest.c @@ -0,0 +1,235 @@ +/* A module that implements defrag callback mechanisms. + */ + +#include "redismodule.h" +#include <stdlib.h> + +static RedisModuleType *FragType; + +struct FragObject { + unsigned long len; + void **values; + int maxstep; +}; + +/* Make sure we get the expected cursor */ +unsigned long int last_set_cursor = 0; + +unsigned long int datatype_attempts = 0; +unsigned long int datatype_defragged = 0; +unsigned long int datatype_resumes = 0; +unsigned long int datatype_wrong_cursor = 0; +unsigned long int global_attempts = 0; +unsigned long int global_defragged = 0; + +int global_strings_len = 0; +RedisModuleString **global_strings = NULL; + +static void createGlobalStrings(RedisModuleCtx *ctx, int count) +{ + global_strings_len = count; + global_strings = RedisModule_Alloc(sizeof(RedisModuleString *) * count); + + for (int i = 0; i < count; i++) { + global_strings[i] = RedisModule_CreateStringFromLongLong(ctx, i); + } +} + +static void defragGlobalStrings(RedisModuleDefragCtx *ctx) +{ + for (int i = 0; i < global_strings_len; i++) { + RedisModuleString *new = RedisModule_DefragRedisModuleString(ctx, global_strings[i]); + global_attempts++; + if (new != NULL) { + global_strings[i] = new; + global_defragged++; + } + } +} + +static void FragInfo(RedisModuleInfoCtx *ctx, int for_crash_report) { + REDISMODULE_NOT_USED(for_crash_report); + + RedisModule_InfoAddSection(ctx, "stats"); + RedisModule_InfoAddFieldLongLong(ctx, "datatype_attempts", datatype_attempts); + RedisModule_InfoAddFieldLongLong(ctx, "datatype_defragged", datatype_defragged); + RedisModule_InfoAddFieldLongLong(ctx, "datatype_resumes", datatype_resumes); + RedisModule_InfoAddFieldLongLong(ctx, "datatype_wrong_cursor", datatype_wrong_cursor); + RedisModule_InfoAddFieldLongLong(ctx, "global_attempts", global_attempts); + RedisModule_InfoAddFieldLongLong(ctx, "global_defragged", global_defragged); +} + +struct FragObject *createFragObject(unsigned long len, unsigned long size, int maxstep) { + struct FragObject *o = RedisModule_Alloc(sizeof(*o)); + o->len = len; + o->values = RedisModule_Alloc(sizeof(RedisModuleString*) * len); + o->maxstep = maxstep; + + for (unsigned long i = 0; i < len; i++) { + o->values[i] = RedisModule_Calloc(1, size); + } + + return o; +} + +/* FRAG.RESETSTATS */ +static int fragResetStatsCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) { + REDISMODULE_NOT_USED(argv); + REDISMODULE_NOT_USED(argc); + + datatype_attempts = 0; + datatype_defragged = 0; + datatype_resumes = 0; + datatype_wrong_cursor = 0; + global_attempts = 0; + global_defragged = 0; + + RedisModule_ReplyWithSimpleString(ctx, "OK"); + return REDISMODULE_OK; +} + +/* FRAG.CREATE key len size maxstep */ +static int fragCreateCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) { + if (argc != 5) + return RedisModule_WrongArity(ctx); + + RedisModuleKey *key = RedisModule_OpenKey(ctx,argv[1], + REDISMODULE_READ|REDISMODULE_WRITE); + int type = RedisModule_KeyType(key); + if (type != REDISMODULE_KEYTYPE_EMPTY) + { + return RedisModule_ReplyWithError(ctx, "ERR key exists"); + } + + long long len; + if ((RedisModule_StringToLongLong(argv[2], &len) != REDISMODULE_OK)) { + return RedisModule_ReplyWithError(ctx, "ERR invalid len"); + } + + long long size; + if ((RedisModule_StringToLongLong(argv[3], &size) != REDISMODULE_OK)) { + return RedisModule_ReplyWithError(ctx, "ERR invalid size"); + } + + long long maxstep; + if ((RedisModule_StringToLongLong(argv[4], &maxstep) != REDISMODULE_OK)) { + return RedisModule_ReplyWithError(ctx, "ERR invalid maxstep"); + } + + struct FragObject *o = createFragObject(len, size, maxstep); + RedisModule_ModuleTypeSetValue(key, FragType, o); + RedisModule_ReplyWithSimpleString(ctx, "OK"); + RedisModule_CloseKey(key); + + return REDISMODULE_OK; +} + +void FragFree(void *value) { + struct FragObject *o = value; + + for (unsigned long i = 0; i < o->len; i++) + RedisModule_Free(o->values[i]); + RedisModule_Free(o->values); + RedisModule_Free(o); +} + +size_t FragFreeEffort(RedisModuleString *key, const void *value) { + REDISMODULE_NOT_USED(key); + + const struct FragObject *o = value; + return o->len; +} + +int FragDefrag(RedisModuleDefragCtx *ctx, RedisModuleString *key, void **value) { + REDISMODULE_NOT_USED(key); + unsigned long i = 0; + int steps = 0; + + int dbid = RedisModule_GetDbIdFromDefragCtx(ctx); + RedisModule_Assert(dbid != -1); + + /* Attempt to get cursor, validate it's what we're exepcting */ + if (RedisModule_DefragCursorGet(ctx, &i) == REDISMODULE_OK) { + if (i > 0) datatype_resumes++; + + /* Validate we're expecting this cursor */ + if (i != last_set_cursor) datatype_wrong_cursor++; + } else { + if (last_set_cursor != 0) datatype_wrong_cursor++; + } + + /* Attempt to defrag the object itself */ + datatype_attempts++; + struct FragObject *o = RedisModule_DefragAlloc(ctx, *value); + if (o == NULL) { + /* Not defragged */ + o = *value; + } else { + /* Defragged */ + *value = o; + datatype_defragged++; + } + + /* Deep defrag now */ + for (; i < o->len; i++) { + datatype_attempts++; + void *new = RedisModule_DefragAlloc(ctx, o->values[i]); + if (new) { + o->values[i] = new; + datatype_defragged++; + } + + if ((o->maxstep && ++steps > o->maxstep) || + ((i % 64 == 0) && RedisModule_DefragShouldStop(ctx))) + { + RedisModule_DefragCursorSet(ctx, i); + last_set_cursor = i; + return 1; + } + } + + last_set_cursor = 0; + return 0; +} + +int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) { + REDISMODULE_NOT_USED(argv); + REDISMODULE_NOT_USED(argc); + + if (RedisModule_Init(ctx, "defragtest", 1, REDISMODULE_APIVER_1) + == REDISMODULE_ERR) return REDISMODULE_ERR; + + if (RedisModule_GetTypeMethodVersion() < REDISMODULE_TYPE_METHOD_VERSION) { + return REDISMODULE_ERR; + } + + long long glen; + if (argc != 1 || RedisModule_StringToLongLong(argv[0], &glen) == REDISMODULE_ERR) { + return REDISMODULE_ERR; + } + + createGlobalStrings(ctx, glen); + + RedisModuleTypeMethods tm = { + .version = REDISMODULE_TYPE_METHOD_VERSION, + .free = FragFree, + .free_effort = FragFreeEffort, + .defrag = FragDefrag + }; + + FragType = RedisModule_CreateDataType(ctx, "frag_type", 0, &tm); + if (FragType == NULL) return REDISMODULE_ERR; + + if (RedisModule_CreateCommand(ctx, "frag.create", + fragCreateCommand, "write deny-oom", 1, 1, 1) == REDISMODULE_ERR) + return REDISMODULE_ERR; + + if (RedisModule_CreateCommand(ctx, "frag.resetstats", + fragResetStatsCommand, "write deny-oom", 1, 1, 1) == REDISMODULE_ERR) + return REDISMODULE_ERR; + + RedisModule_RegisterInfoFunc(ctx, FragInfo); + RedisModule_RegisterDefragFunc(ctx, defragGlobalStrings); + + return REDISMODULE_OK; +} |