1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/**\ --MPE_Log--
* * mpe_log_adjusttime.c - routines for adjusting timer values before
* * merging all the data
* *
* * MPE_Log currently represents some code written by Dr. William
* * Gropp, stolen from Chameleon's 'blog' logging package and
* * modified by Ed Karrels, as well as some fresh code written
* * by Ed Karrels.
* *
* * All work funded by Argonne National Laboratory
\**/
/* Forward refs for this file */
void MPE_Log_adjtime2 _ANSI_ARGS_ ((void));
/* Convert the times to an offset from the starting time */
void MPE_Log_adjtime1()
{
int xx_i, *bp, n;
double temp_time, dif;
MPE_Log_BLOCK *bl;
MPE_Log_HEADER *ap;
bl = MPE_Log_firstBlock;
while (bl) {
n = bl->size;
bp = (int *)(bl + 1);
xx_i = 0;
while (xx_i < n) {
ap = (MPE_Log_HEADER *)bp;
MOVEDBL( &temp_time, &ap->time ); /* temp_time = ap->time */
if (temp_time != 0) {
dif = temp_time - MPE_Log_tinit;
MOVEDBL( &ap->time, &dif ); /* ap->time.s2 = dif; */
#if DEBUG>2
fprintf( debug_file, "adjust1 time %10.5lf to %10.5lf\n", temp_time, dif );
#endif
}
xx_i += ap->len;
bp += ap->len;
}
bl = bl->next;
}
}
/*
Find skew and a basic offset based on the global sync events in the
log. Returns 1 if values found, 0 otherwise.
*/
int MPE_Log_FindSkew( Skew, Goff )
double *Skew, *Goff;
{
int xx_i, *bp, n;
double sync_start, sync_end, temp_time;
double proc0_times[2];
int found_first = 0, nsync = 0;
MPE_Log_BLOCK *bl;
MPE_Log_HEADER *ap;
/* printf( "[%d] starting adj 2\n", MPE_Log_procid ); */
bl = MPE_Log_firstBlock;
while (bl) {
n = bl->size;
bp = (int *)(bl + 1);
xx_i = 0;
while (xx_i < n) {
ap = (MPE_Log_HEADER *)bp;
if (ap->event == MPE_Log_EVENT_SYNC) {
MOVEDBL( &temp_time, &ap->time );
#if DEBUG
fprintf( debug_file, "[%d] sync event at %10.5lf\n", MPE_Log_procid,
temp_time );
#endif
if (found_first)
sync_end = temp_time;
else {
sync_start = temp_time;
found_first = 1;
}
nsync ++;
}
xx_i += ap->len;
bp += ap->len;
}
bl = bl->next;
}
/* Trade the information (for more complete adjustments, everyone needs
the skews and global offsets) */
proc0_times[0] = sync_start;
proc0_times[1] = sync_end;
MPI_Bcast( proc0_times, 2, MPI_DOUBLE, 0, MPI_COMM_WORLD );
/* Don't do anything if there aren't enough values */
if (nsync < 2) {
return 0;
}
/* printf( "[%d] scaling times \n", MPI_Log_procid ); */
*Skew = (proc0_times[1] - proc0_times[0]) / (sync_end - sync_start);
*Goff = proc0_times[0] - sync_start;
return 1;
}
void MPE_Log_ApplyTimeCorrection( sk, goff )
double sk, goff;
{
int xx_i, *bp, n;
double temp_time, adjustedTime;
MPE_Log_BLOCK *bl;
MPE_Log_HEADER *ap;
bl = MPE_Log_firstBlock;
while (bl) {
n = bl->size;
bp = (int *)(bl + 1);
xx_i = 0;
while (xx_i < n) {
ap = (MPE_Log_HEADER *)bp;
MOVEDBL( &temp_time, &ap->time );
if (temp_time) {
adjustedTime = temp_time * sk + goff;
if (adjustedTime < 0.0) adjustedTime = 0.0;
/* just in case we go negative, don't want to scare anyone */
MOVEDBL( &ap->time, &adjustedTime );
#if DEBUG>2
fprintf( debug_file, "adjust2 time %10.5lf to %10.5lf\n",
temp_time, adjustedTime );
#endif
}
xx_i += ap->len;
bp += ap->len;
}
bl = bl->next;
}
}
/*
Adjust times for skew and offset variations to match process 0
*/
void MPE_Log_adjtime2()
{
double sk, goff;
/* Set the defaults, just in case */
sk = 1.0;
goff = 0.0;
if (!MPE_Log_FindSkew( &sk, &goff )) return;
MPE_Log_ApplyTimeCorrection( sk, goff );
}
int MPE_Log_adjusttimes()
{
if (MPE_Log_AdjustedTimes) return 0;
MPE_Log_adjtime1();
MPE_Log_adjtime2();
MPE_Log_AdjustedTimes = 1;
return 0;
}
/* This shifts ALL times by the minimum time value on ALL processors */
int MPE_Log_adjust_time_origin()
{
double t1;
/* Compute the MPE_Log_tinit time */
t1 = MPE_Log_tinit;
MPI_Allreduce( &t1, &MPE_Log_tinit, 1, MPI_DOUBLE, MPI_MIN,
MPI_COMM_WORLD );
MPE_Log_adjtime1();
return 0;
}
|
