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Commit c38ee987 authored by Shane Snyder's avatar Shane Snyder
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add aggregation function to stdio module logutils

parent 107dcfc1
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darshan-util/darshan-stdio-logutils.c
View file @ c38ee987
......@@ -39,6 +39,7 @@ static void darshan_log_print_stdio_record(void *file_rec,
static void darshan_log_print_stdio_description(void);
static void darshan_log_print_stdio_record_diff(void *file_rec1, char *file_name1,
void *file_rec2, char *file_name2);
static void darshan_log_agg_stdio_records(void *rec, void *agg_rec, int init_flag);
/* structure storing each function needed for implementing the darshan
* logutil interface. these functions are used for reading, writing, and
......@@ -50,12 +51,13 @@ struct darshan_mod_logutil_funcs stdio_logutils =
.log_put_record = &darshan_log_put_stdio_record,
.log_print_record = &darshan_log_print_stdio_record,
.log_print_description = &darshan_log_print_stdio_description,
.log_print_diff = &darshan_log_print_stdio_record_diff
.log_print_diff = &darshan_log_print_stdio_record_diff,
.log_agg_records = &darshan_log_agg_stdio_records
};
/* retrieve a STDIO record from log file descriptor 'fd', storing the
* buffer in 'stdio_buf'. Return 1 on successful record read, 0 on no
* more data, and -1 on error.
* data in the buffer address pointed to by 'stdio_buf_p'. Return 1 on
* successful record read, 0 on no more data, and -1 on error.
*/
static int darshan_log_get_stdio_record(darshan_fd fd, void** stdio_buf_p)
{
......@@ -243,6 +245,178 @@ static void darshan_log_print_stdio_record_diff(void *file_rec1, char *file_name
return;
}
/* simple helper struct for determining time & byte variances */
struct var_t
{
double n;
double M;
double S;
};
static void darshan_log_agg_stdio_records(void *rec, void *agg_rec, int init_flag)
{
struct darshan_stdio_file *stdio_rec = (struct darshan_stdio_file *)rec;
struct darshan_stdio_file *agg_stdio_rec = (struct darshan_stdio_file *)agg_rec;
int i;
double old_M;
double stdio_time = stdio_rec->fcounters[STDIO_F_READ_TIME] +
stdio_rec->fcounters[STDIO_F_WRITE_TIME] +
stdio_rec->fcounters[STDIO_F_META_TIME];
double stdio_bytes = (double)stdio_rec->counters[STDIO_BYTES_READ] +
stdio_rec->counters[STDIO_BYTES_WRITTEN];
struct var_t *var_time_p = (struct var_t *)
((char *)rec + sizeof(struct darshan_stdio_file));
struct var_t *var_bytes_p = (struct var_t *)
((char *)var_time_p + sizeof(struct var_t));
for(i = 0; i < STDIO_NUM_INDICES; i++)
{
switch(i)
{
case STDIO_OPENS:
case STDIO_READS:
case STDIO_WRITES:
case STDIO_SEEKS:
case STDIO_FLUSHES:
case STDIO_BYTES_WRITTEN:
case STDIO_BYTES_READ:
/* sum */
agg_stdio_rec->counters[i] += stdio_rec->counters[i];
break;
case STDIO_MAX_BYTE_READ:
case STDIO_MAX_BYTE_WRITTEN:
/* max */
if(stdio_rec->counters[i] > agg_stdio_rec->counters[i])
{
agg_stdio_rec->counters[i] = stdio_rec->counters[i];
}
break;
case STDIO_FASTEST_RANK:
case STDIO_FASTEST_RANK_BYTES:
case STDIO_SLOWEST_RANK:
case STDIO_SLOWEST_RANK_BYTES:
/* these are set with the FP counters */
break;
default:
agg_stdio_rec->counters[i] = -1;
break;
}
}
for(i = 0; i < STDIO_F_NUM_INDICES; i++)
{
switch(i)
{
case STDIO_F_META_TIME:
case STDIO_F_WRITE_TIME:
case STDIO_F_READ_TIME:
/* sum */
agg_stdio_rec->fcounters[i] += stdio_rec->fcounters[i];
break;
case STDIO_F_OPEN_START_TIMESTAMP:
case STDIO_F_CLOSE_START_TIMESTAMP:
case STDIO_F_WRITE_START_TIMESTAMP:
case STDIO_F_READ_START_TIMESTAMP:
/* minimum non-zero */
if((stdio_rec->fcounters[i] > 0) &&
((agg_stdio_rec->fcounters[i] == 0) ||
(stdio_rec->fcounters[i] < agg_stdio_rec->fcounters[i])))
{
agg_stdio_rec->fcounters[i] = stdio_rec->fcounters[i];
}
break;
case STDIO_F_OPEN_END_TIMESTAMP:
case STDIO_F_CLOSE_END_TIMESTAMP:
case STDIO_F_WRITE_END_TIMESTAMP:
case STDIO_F_READ_END_TIMESTAMP:
/* maximum */
if(stdio_rec->fcounters[i] > agg_stdio_rec->fcounters[i])
{
agg_stdio_rec->fcounters[i] = stdio_rec->fcounters[i];
}
break;
case STDIO_F_FASTEST_RANK_TIME:
if(init_flag)
{
/* set fastest rank counters according to root rank. these counters
* will be determined as the aggregation progresses.
*/
agg_stdio_rec->counters[STDIO_FASTEST_RANK] = stdio_rec->base_rec.rank;
agg_stdio_rec->counters[STDIO_FASTEST_RANK_BYTES] = stdio_bytes;
agg_stdio_rec->fcounters[STDIO_F_FASTEST_RANK_TIME] = stdio_time;
}
if(stdio_time < agg_stdio_rec->fcounters[STDIO_F_FASTEST_RANK_TIME])
{
agg_stdio_rec->counters[STDIO_FASTEST_RANK] = stdio_rec->base_rec.rank;
agg_stdio_rec->counters[STDIO_FASTEST_RANK_BYTES] = stdio_bytes;
agg_stdio_rec->fcounters[STDIO_F_FASTEST_RANK_TIME] = stdio_time;
}
break;
case STDIO_F_SLOWEST_RANK_TIME:
if(init_flag)
{
/* set slowest rank counters according to root rank. these counters
* will be determined as the aggregation progresses.
*/
agg_stdio_rec->counters[STDIO_SLOWEST_RANK] = stdio_rec->base_rec.rank;
agg_stdio_rec->counters[STDIO_SLOWEST_RANK_BYTES] = stdio_bytes;
agg_stdio_rec->fcounters[STDIO_F_SLOWEST_RANK_TIME] = stdio_time;
}
if(stdio_time > agg_stdio_rec->fcounters[STDIO_F_SLOWEST_RANK_TIME])
{
agg_stdio_rec->counters[STDIO_SLOWEST_RANK] = stdio_rec->base_rec.rank;
agg_stdio_rec->counters[STDIO_SLOWEST_RANK_BYTES] = stdio_bytes;
agg_stdio_rec->fcounters[STDIO_F_SLOWEST_RANK_TIME] = stdio_time;
}
break;
case STDIO_F_VARIANCE_RANK_TIME:
if(init_flag)
{
var_time_p->n = 1;
var_time_p->M = stdio_time;
var_time_p->S = 0;
}
else
{
old_M = var_time_p->M;
var_time_p->n++;
var_time_p->M += (stdio_time - var_time_p->M) / var_time_p->n;
var_time_p->S += (stdio_time - var_time_p->M) * (stdio_time - old_M);
agg_stdio_rec->fcounters[STDIO_F_VARIANCE_RANK_TIME] =
var_time_p->S / var_time_p->n;
}
break;
case STDIO_F_VARIANCE_RANK_BYTES:
if(init_flag)
{
var_bytes_p->n = 1;
var_bytes_p->M = stdio_bytes;
var_bytes_p->S = 0;
}
else
{
old_M = var_bytes_p->M;
var_bytes_p->n++;
var_bytes_p->M += (stdio_bytes - var_bytes_p->M) / var_bytes_p->n;
var_bytes_p->S += (stdio_bytes - var_bytes_p->M) * (stdio_bytes - old_M);
agg_stdio_rec->fcounters[STDIO_F_VARIANCE_RANK_BYTES] =
var_bytes_p->S / var_bytes_p->n;
}
break;
default:
agg_stdio_rec->fcounters[i] = -1;
break;
}
}
return;
}
/*
* Local variables:
......
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