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Commit 40c8ed2e authored by Shane Snyder's avatar Shane Snyder
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updat todos, instrumentation for posix open/close

parent b1ae796c
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Showing with 149 additions and 47 deletions
darshan-modularization-design-notes.txt
View file @ 40c8ed2e
......@@ -115,3 +115,8 @@ TODO NOTES:
- why are darshan mutexes recursive?
- how do we allow modules to specify there necessary linker/wrapper flags
- configurable amount of max runtime memory
- how do we associate handles with file/object records?
- easily doable within module, but can we refactor and make this common code?
- fs mount information -- should we export this info from darshan-core?
- would the posix module be the only one to leverage this info?
- it is used to correlate filenames with mount points, but not sure what is needed where
darshan-runtime/lib/darshan-posix.c
View file @ 40c8ed2e
......@@ -128,7 +128,7 @@ enum darshan_posix_indices
};
/* floating point statistics */
enum f_darshan_posix_indices
enum darshan_f_posix_indices
{
/* NOTE: adjust cp_normalize_timestamps() function if any TIMESTAMPS are
* added or modified in this list
......@@ -159,26 +159,35 @@ enum f_darshan_posix_indices
struct darshan_posix_file
{
darshan_file_id f_id;
int64_t rank;
int64_t counters[CP_NUM_INDICES];
double fcounters[CP_F_NUM_INDICES];
};
struct darshan_posix_runtime_file
struct posix_runtime_file
{
struct darshan_posix_file file_record;
UT_hash_handle hlink;
};
struct darshan_posix_runtime
struct posix_runtime_file_ref
{
struct darshan_posix_runtime_file* file_array;
struct posix_runtime_file* file;
int fd;
UT_hash_handle hlink;
};
struct posix_runtime
{
struct posix_runtime_file* file_array;
int file_array_size;
int file_count;
struct darshan_posix_runtime_file* file_hash;
struct posix_runtime_file* file_hash;
struct posix_runtime_file_ref* fd_hash;
};
static struct posix_runtime *posix_runtime = NULL;
static pthread_mutex_t posix_runtime_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
static struct darshan_posix_runtime *posix_runtime = NULL;
static int my_rank = -1;
static int darshan_mem_alignment = 1;
......@@ -198,19 +207,61 @@ NULL
};
DARSHAN_FORWARD_DECL(open, int, (const char *path, int flags, ...));
//DARSHAN_FORWARD_DECL(close, int, (int fd));
DARSHAN_FORWARD_DECL(close, int, (int fd));
static void posix_runtime_initialize(void);
static void posix_runtime_finalize(void);
static struct posix_runtime_file* posix_file_by_name(const char *name);
static struct posix_runtime_file* posix_file_by_name_setfd(const char* name, int fd);
static void posix_file_close_fd(int fd);
static void posix_prepare_for_shutdown(void);
static void posix_get_output_data(void **buffer, int size);
#define POSIX_LOCK() pthread_mutex_lock(&posix_runtime_mutex)
#define POSIX_UNLOCK() pthread_mutex_unlock(&posix_runtime_mutex)
#define POSIX_SET(__file, __counter, __value) do {\
(__file)->file_record.counters[__counter] = __value; \
} while(0)
#define POSIX_F_SET(__file, __counter, __value) do {\
(__file)->file_record.fcounters[__counter] = __value; \
} while(0)
#define POSIX_INC(__file, __counter, __value) do {\
(__file)->file_record.counters[__counter] += __value; \
} while(0)
#define POSIX_F_INC(__file, __counter, __value) do {\
(__file)->file_record.fcounters[__counter] += __value; \
} while(0)
#define POSIX_F_INC_NO_OVERLAP(__file, __tm1, __tm2, __last, __counter) do { \
if(__tm1 > __last) \
POSIX_F_INC(__file, __counter, (__tm2-__tm1)); \
else \
POSIX_F_INC(__file, __counter, (__tm2 - __last)); \
if(__tm2 > __last) \
__last = __tm2; \
} while(0)
#define POSIX_VALUE(__file, __counter) \
((__file)->file_record.counters[__counter])
#define POSIX_F_VALUE(__file, __counter) \
((__file)->file_record.fcounters[__counter])
#define POSIX_MAX(__file, __counter, __value) do {\
if((__file)->file_record.counters[__counter] < __value) \
{ \
(__file)->file_record.counters[__counter] = __value; \
} \
} while(0)
#define POSIX_RECORD_OPEN(__ret, __path, __mode, __stream_flag, __tm1, __tm2) do { \
struct darshan_posix_runtime_file* file; \
struct posix_runtime_file* file; \
char* exclude; \
int tmp_index = 0; \
if(__ret < 0) break; \
......@@ -220,22 +271,18 @@ static void posix_get_output_data(void **buffer, int size);
tmp_index++; \
} \
if(exclude) break; \
file = darshan_file_by_name(__path, __ret); \
file = posix_file_by_name_setfd(__path, __ret); \
if(!file) break; \
file->log_file->rank = my_rank; \
file->file_record.rank = my_rank; \
if(__mode) \
DARSHAN_SET(file, DARSHAN_MODE, __mode); \
file->offset = 0; \
file->last_byte_written = 0; \
file->last_byte_read = 0; \
POSIX_SET(file, CP_MODE, __mode); \
if(__stream_flag)\
DARSHAN_INC(file, DARSHAN_POSIX_FOPENS, 1); \
POSIX_INC(file, CP_POSIX_FOPENS, 1); \
else \
DARSHAN_INC(file, DARSHAN_POSIX_OPENS, 1); \
if(DARSHAN_F_VALUE(file, DARSHAN_F_OPEN_TIMESTAMP) == 0) \
DARSHAN_F_SET(file, DARSHAN_F_OPEN_TIMESTAMP, __tm1); \
DARSHAN_F_INC_NO_OVERLAP(file, __tm1, __tm2, file->last_posix_meta_end, DARSHAN_F_POSIX_META_TIME); \
} while (0)
POSIX_INC(file, CP_POSIX_OPENS, 1); \
if(POSIX_F_VALUE(file, CP_F_OPEN_TIMESTAMP) == 0) \
POSIX_F_SET(file, CP_F_OPEN_TIMESTAMP, __tm1); \
} while(0)
int DARSHAN_DECL(open)(const char *path, int flags, ...)
{
......@@ -266,14 +313,13 @@ int DARSHAN_DECL(open)(const char *path, int flags, ...)
POSIX_LOCK();
posix_runtime_initialize();
//POSIX_RECORD_OPEN(ret, path, mode, 0, tm1, tm2);
POSIX_RECORD_OPEN(ret, path, mode, 0, tm1, tm2);
POSIX_UNLOCK();
return(ret);
}
#if 0
int DARSHAN_DECL(close)(int fd)
{
struct darshan_file_runtime* file;
......@@ -290,21 +336,12 @@ int DARSHAN_DECL(close)(int fd)
POSIX_LOCK();
posix_runtime_initialize();
file = darshan_file_by_fd(tmp_fd);
if(file)
{
file->last_byte_written = 0;
file->last_byte_read = 0;
DARSHAN_F_SET(file, DARSHAN_F_CLOSE_TIMESTAMP, posix_wtime());
DARSHAN_F_INC_NO_OVERLAP(file, tm1, tm2, file->last_posix_meta_end, DARSHAN_F_POSIX_META_TIME);
darshan_file_close_fd(tmp_fd);
}
posix_file_close_fd(tmp_fd);
POSIX_UNLOCK();
return(ret);
}
#endif
/* ***************************************************** */
......@@ -362,27 +399,28 @@ static void posix_runtime_initialize()
&mem_limit);
/* set maximum number of file records according to max memory limit */
posix_runtime->file_array_size = mem_limit / sizeof(struct darshan_posix_runtime_file);
/* NOTE: maximum number of records is based on the size of a posix file record */
posix_runtime->file_array_size = mem_limit / sizeof(struct darshan_posix_file);
/* allocate array of runtime file records */
posix_runtime->file_array = malloc(sizeof(struct darshan_posix_runtime_file) *
posix_runtime->file_array = malloc(sizeof(struct posix_runtime_file) *
posix_runtime->file_array_size);
if(!posix_runtime->file_array)
{
posix_runtime->file_array_size = 0;
return;
}
memset(posix_runtime->file_array, 0, sizeof(struct darshan_posix_runtime_file) *
memset(posix_runtime->file_array, 0, sizeof(struct posix_runtime_file) *
posix_runtime->file_array_size);
return;
}
static struct darshan_posix_runtime_file* posix_file_by_name(const char *name)
static struct posix_runtime_file* posix_file_by_name(const char *name)
{
struct darshan_posix_runtime_file *tmp_file = NULL;
struct posix_runtime_file *file = NULL;
char *newname = NULL;
darshan_file_id tmp_id;
darshan_file_id file_id;
if(!posix_runtime)
return(NULL);
......@@ -396,29 +434,88 @@ static struct darshan_posix_runtime_file* posix_file_by_name(const char *name)
(void*)newname,
strlen(newname),
1,
&tmp_id);
&file_id);
/* search the hash table for this file record, and return if found */
HASH_FIND(hlink, posix_runtime->file_hash, &tmp_id, sizeof(darshan_file_id), tmp_file);
if (tmp_file)
HASH_FIND(hlink, posix_runtime->file_hash, &file_id, sizeof(darshan_file_id), file);
if(file)
{
if (newname != name)
if(newname != name)
free(newname);
return(tmp_file);
return(file);
}
/* no existing record, assign a new file record from the global array */
tmp_file = &posix_runtime->file_array[posix_runtime->file_count];
tmp_file->file_record.f_id = tmp_id;
file = &posix_runtime->file_array[posix_runtime->file_count];
file->file_record.f_id = file_id;
/* add new record to file hash table */
HASH_ADD(hlink, posix_runtime->file_hash, file_record.f_id, sizeof(darshan_file_id), tmp_file);
HASH_ADD(hlink, posix_runtime->file_hash, file_record.f_id, sizeof(darshan_file_id), file);
posix_runtime->file_count++;
if(newname != name)
free(newname);
return(tmp_file);
return(file);
}
static struct posix_runtime_file* posix_file_by_name_setfd(const char* name, int fd)
{
struct posix_runtime_file* file;
struct posix_runtime_file_ref* ref;
if(!posix_runtime)
return(NULL);
/* find file record by name first */
file = posix_file_by_name(name);
if(!file)
return(NULL);
/* search hash table for existing file ref for this fd */
HASH_FIND(hlink, posix_runtime->fd_hash, &fd, sizeof(int), ref);
if(ref)
{
/* we have a reference. Make sure it points to the correct file
* and return it
*/
ref->file = file;
return(file);
}
/* if we hit this point, then we don't have a reference for this fd
* in the table yet. Add it.
*/
ref = malloc(sizeof(*ref));
if(!ref)
return(NULL);
memset(ref, 0, sizeof(*ref));
ref->file = file;
ref->fd = fd;
HASH_ADD(hlink, posix_runtime->fd_hash, fd, sizeof(int), ref);
return(file);
}
static void posix_file_close_fd(int fd)
{
struct posix_runtime_file_ref *ref;
if(!posix_runtime)
return;
/* search hash table for this fd */
HASH_FIND(hlink, posix_runtime->fd_hash, &fd, sizeof(int), ref);
if (ref)
{
/* we have a reference, delete it */
HASH_DELETE(hlink, posix_runtime->fd_hash, ref);
free(ref);
}
return;
}
/* ***************************************************** */
......
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