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
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
|
#include <algorithm>
#include <cassert>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <unistd.h>
#include <mpi.h>
#include "cctk.h"
#include "cctk_Arguments.h"
#include "cctk_Parameters.h"
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#include "defs.hh"
#include "dist.hh"
#include "timestat.hh"
namespace CarpetLib {
using namespace std;
// The timer type
enum timer_type {
timer_unset, timer_MPI_Wtime, timer_rdtsc, timer_rtc, timer_none
};
static timer_type thetimer = timer_unset;
// A faster timing routine for i386 processors:
// Read the Intel CPU time stamp counter
static
double rdtsc_cputick = 1.0;
static inline
double
rdtsc ()
{
// Test for i386 (should use autoconf instead)
#if defined(__i386__) || defined(__x86_64__)
// Serialise using cpuid
// (This is strictly necessary only on some systems)
{
unsigned long eax;
asm volatile ("movl %%ebx, %%esi; cpuid; movl %%esi, %%ebx" :
"=a" (eax) : "a" (0) : "edx", "ecx", "esi");
}
// Using "=A" does not work on x86_64, where this uses rax instead
// of (edx,eax)
// unsigned long long val;
// __asm__ __volatile__("rdtsc" : "=A" (val) : );
unsigned long eax, edx;
asm volatile ("rdtsc" : "=a" (eax), "=d" (edx));
return rdtsc_cputick * ((unsigned long long) edx << 32 | eax);
#else
static bool have_warned = false;
if (not have_warned) {
CCTK_WARN (1, "The Intel rdtsc timer is not supported");
have_warned = true;
}
return 0;
#endif
}
static
void
init_rdtsc ()
{
// Make three warmup measurements
double const rdummy1 = rdtsc ();
double const rdummy2 = rdtsc ();
double const rdummy3 = rdtsc ();
double const rstart = rdtsc ();
double const wstart = MPI_Wtime ();
// int const ierr = usleep (1000 * 1000);
while (MPI_Wtime() < wstart + 1.0) {
// do nothing, just wait
}
double const rend = rdtsc ();
double const wend = MPI_Wtime ();
// if (ierr) {
// CCTK_WARN (1, "Could not determine a reliable rdtsc timer resolution");
// }
rdtsc_cputick *= (wend - wstart) / (rend - rstart);
}
// A faster timing routine for AIX
static inline
double
rtc ()
{
// Test for AIX (should use autoconf instead)
#ifdef __IBMC__
timebasestruct_t val;
read_real_time (& val, TIMEBASE_SZ);
time_base_to_time (& val, TIMEBASE_SZ);
return val.tb_high + 1.0e-9 * val.tb_low;
#else
static bool have_warned = false;
if (not have_warned) {
CCTK_WARN (1, "The AIX rtc timer not supported");
have_warned = true;
}
return 0;
#endif
}
// Call a timer
static
double
call_timer ()
{
DECLARE_CCTK_PARAMETERS;
if (thetimer == timer_unset) {
if (CCTK_EQUALS (timestat_timer, "MPI_Wtime")) {
thetimer = timer_MPI_Wtime;
} else if (CCTK_EQUALS (timestat_timer, "rdtsc")) {
thetimer = timer_rdtsc;
init_rdtsc ();
} else if (CCTK_EQUALS (timestat_timer, "rtc")) {
thetimer = timer_rtc;
} else if (CCTK_EQUALS (timestat_timer, "none")) {
thetimer = timer_none;
} else {
assert (0);
}
}
switch (thetimer) {
case timer_MPI_Wtime:
return MPI_Wtime ();
case timer_rdtsc:
return rdtsc ();
case timer_rtc:
return rtc ();
case timer_none:
return 0.0;
default:
assert (0);
}
abort ();
}
// A global timer set
static
TimerSet timerSet;
// Add a timer
void
TimerSet::add (Timer * const timer)
{
timers.push_back (timer);
}
// Remove a timer
void
TimerSet::remove (Timer * const timer)
{
timers.remove (timer);
}
// Output all timer names
void
TimerSet::outputNames (ostream & os)
const
{
os << "Timer names:" << eol;
int n = 0;
for (list <Timer *>::const_iterator
itimer = timers.begin(); itimer != timers.end(); ++ itimer)
{
os << " [" << setw (4) << setfill ('0') << n << "] "
<< (* itimer)->name() << eol;
++ n;
}
}
// Output all timer data
void
TimerSet::outputData (ostream & os)
const
{
for (list <Timer *>::const_iterator
itimer = timers.begin(); itimer != timers.end(); ++ itimer)
{
os << * (* itimer);
}
}
// Create a new timer with the given name
Timer::Timer (char const * const timername_)
: timername (timername_)
{
assert (timername_);
resetstats ();
timerSet.add (this);
}
// Destroy a timer
Timer::~Timer ()
{
timerSet.remove (this);
}
// Reset the statistics
void
Timer::resetstats ()
{
wtime = 0.0;
wtime2 = 0.0;
wmin = 0.0;
wmax = 0.0;
bytes = 0.0;
bytes2 = 0.0;
bmin = 0.0;
bmax = 0.0;
count = 0.0;
running = false;
}
// Add statistics of a timing operation
void
Timer::addstat (double const t,
double const b)
{
wtime += t;
wtime2 += pow (t, 2);
wmin = min (wmin, t);
wmax = max (wmax, t);
bytes += b;
bytes2 += pow (b, 2);
bmin = min (bmin, b);
bmax = max (bmax, b);
++ count;
}
// Start the timer
void
Timer::start ()
{
DECLARE_CCTK_PARAMETERS;
if (thetimer == timer_none) return;
assert (not running);
running = true;
starttime = call_timer ();
}
// Stop the timer
void
Timer::stop (double const b)
{
DECLARE_CCTK_PARAMETERS;
if (thetimer == timer_none) return;
assert (running);
running = false;
double const endtime = call_timer ();
addstat (endtime - starttime, b);
}
// Reset the timer
void
Timer::reset ()
{
resetstats ();
}
// Timer name
string
Timer::name ()
const
{
return timername;
}
// Output timer data
void
Timer::outputData (ostream & os)
const
{
double avg, stddev, bavg, bstddev;
if (count == 0.0) {
avg = 0.0;
stddev = 0.0;
bavg = 0.0;
bstddev = 0.0;
} else {
avg = wtime / count;
stddev = sqrt (max (0.0, wtime2 / count - pow (avg, 2)));
bavg = bytes / count;
bstddev = sqrt (max (0.0, bytes2 / count - pow (bavg, 2)));
}
os << timername << ":"
<< " cnt: " << count
<< " time: sum: " << wtime
<< " avg: " << avg
<< " stddev: " << stddev
<< " min: " << wmin
<< " max: " << wmax
<< " bytes: sum: " << bytes
<< " avg: " << bavg
<< " stddev: " << bstddev
<< " min: " << bmin
<< " max: " << bmax
<< eol;
}
extern "C" {
void
CarpetLib_printtimestats (CCTK_ARGUMENTS);
}
void
CarpetLib_printtimestats (CCTK_ARGUMENTS)
{
DECLARE_CCTK_ARGUMENTS;
DECLARE_CCTK_PARAMETERS;
if ((print_timestats_every > 0 and
cctk_iteration % print_timestats_every == 0))
{
ostringstream filenamebuf;
filenamebuf << out_dir << "/" << timestat_file
<< "." << setw(4) << setfill('0') << dist::rank()
<< ".txt";
string const filename = filenamebuf.str();
ofstream file;
static bool do_truncate = true;
if (do_truncate) {
if (not IO_TruncateOutputFiles (cctkGH)) {
do_truncate = false;
}
}
if (do_truncate) {
do_truncate = false;
file.open (filename.c_str(), ios::out | ios::trunc);
} else {
file.open (filename.c_str(), ios::out | ios::app);
}
static bool do_print_info = true;
if (do_print_info) {
do_print_info = false;
if (CCTK_IsFunctionAliased ("UniqueBuildID")) {
char const * const build_id =
static_cast <char const *> (UniqueBuildID (cctkGH));
file << "Build ID: " << build_id << eol;
}
if (CCTK_IsFunctionAliased ("UniqueSimulationID")) {
char const * const job_id =
static_cast <char const *> (UniqueSimulationID (cctkGH));
file << "Simulation ID: " << job_id << eol;
}
file << "Running on " << dist::size() << " processors" << eol;
} // if do_print_info
file << "********************************************************************************" << eol
<< "CarpetLib timing information at iteration " << cctkGH->cctk_iteration << " time " << cctkGH->cctk_time << ":" << eol
<< timerSet;
file.close ();
} // if print_timestats
}
} // namespace CarpetLib
|