summaryrefslogtreecommitdiff
path: root/includes/rts/Flags.h
blob: d0c41a157675a6f7089388d3932c58fa7f4fdbae (plain)
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
/* -----------------------------------------------------------------------------
 *
 * (c) The GHC Team, 1998-2009
 *
 * Datatypes that holds the command-line flag settings.
 *
 * Do not #include this file directly: #include "Rts.h" instead.
 *
 * To understand the structure of the RTS headers, see the wiki:
 *   https://gitlab.haskell.org/ghc/ghc/wikis/commentary/source-tree/includes
 *
 * ---------------------------------------------------------------------------*/

#pragma once

#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include "stg/Types.h"
#include "Time.h"

/* For defaults, see the @initRtsFlagsDefaults@ routine. */

/* Note [Synchronization of flags and base APIs]
 *
 * We provide accessors to RTS flags in base. (GHC.RTS module)
 * The API should be updated whenever RTS flags are modified.
 */

/* See Note [Synchronization of flags and base APIs] */
typedef struct _GC_FLAGS {
    FILE   *statsFile;
    uint32_t  giveStats;
#define NO_GC_STATS	 0
#define COLLECT_GC_STATS 1
#define ONELINE_GC_STATS 2
#define SUMMARY_GC_STATS 3
#define VERBOSE_GC_STATS 4

    uint32_t     maxStkSize;         /* in *words* */
    uint32_t     initialStkSize;     /* in *words* */
    uint32_t     stkChunkSize;       /* in *words* */
    uint32_t     stkChunkBufferSize; /* in *words* */

    uint32_t     maxHeapSize;        /* in *blocks* */
    uint32_t     minAllocAreaSize;   /* in *blocks* */
    uint32_t     largeAllocLim;      /* in *blocks* */
    uint32_t     nurseryChunkSize;   /* in *blocks* */
    uint32_t     minOldGenSize;      /* in *blocks* */
    uint32_t     heapSizeSuggestion; /* in *blocks* */
    bool heapSizeSuggestionAuto;
    double  oldGenFactor;
    double  pcFreeHeap;

    bool         useNonmoving; // default = false
    bool         nonmovingSelectorOpt; // Do selector optimization in the
                                       // non-moving heap, default = false
    uint32_t     generations;
    bool squeezeUpdFrames;

    bool compact;		/* True <=> "compact all the time" */
    double  compactThreshold;

    bool sweep;		/* use "mostly mark-sweep" instead of copying
                                 * for the oldest generation */
    bool ringBell;

    Time    idleGCDelayTime;    /* units: TIME_RESOLUTION */
    Time    interIdleGCWait;    /* units: TIME_RESOLUTION */
    bool doIdleGC;

    Time    longGCSync;         /* units: TIME_RESOLUTION */

    StgWord heapBase;           /* address to ask the OS for memory */

    StgWord allocLimitGrace;    /* units: *blocks*
                                 * After an AllocationLimitExceeded
                                 * exception has been raised, how much
                                 * extra space is given to the thread
                                 * to handle the exception before we
                                 * raise it again.
                                 */
    StgWord heapLimitGrace;     /* units: *blocks*
                                 * After a HeapOverflow exception has
                                 * been raised, how much extra space is
                                 * given to the thread to handle the
                                 * exception before we raise it again.
                                 */

    bool numa;                   /* Use NUMA */
    StgWord numaMask;
} GC_FLAGS;

/* See Note [Synchronization of flags and base APIs] */
typedef struct _DEBUG_FLAGS {
    /* flags to control debugging output & extra checking in various subsystems */
    bool scheduler;      /* 's' */
    bool interpreter;    /* 'i' */
    bool weak;           /* 'w' */
    bool gccafs;         /* 'G' */
    bool gc;             /* 'g' */
    bool nonmoving_gc;   /* 'n' */
    bool block_alloc;    /* 'b' */
    bool sanity;         /* 'S'   warning: might be expensive! */
    bool zero_on_gc;     /* 'Z' */
    bool stable;         /* 't' */
    bool prof;           /* 'p' */
    bool linker;         /* 'l'   the object linker */
    bool apply;          /* 'a' */
    bool stm;            /* 'm' */
    bool squeeze;        /* 'z'  stack squeezing & lazy blackholing */
    bool hpc;            /* 'c' coverage */
    bool sparks;         /* 'r' */
    bool numa;           /* '--debug-numa' */
    bool compact;        /* 'C' */
} DEBUG_FLAGS;

/* See Note [Synchronization of flags and base APIs] */
typedef struct _COST_CENTRE_FLAGS {
    uint32_t    doCostCentres;
# define COST_CENTRES_NONE      0
# define COST_CENTRES_SUMMARY	1
# define COST_CENTRES_VERBOSE	2 /* incl. serial time profile */
# define COST_CENTRES_ALL	3
# define COST_CENTRES_JSON      4

    int	    profilerTicks;   /* derived */
    int	    msecsPerTick;    /* derived */
    char const *outputFileNameStem;
} COST_CENTRE_FLAGS;

/* See Note [Synchronization of flags and base APIs] */
typedef struct _PROFILING_FLAGS {
    uint32_t doHeapProfile;
# define NO_HEAP_PROFILING	0	/* N.B. Used as indexes into arrays */
# define HEAP_BY_CCS		1
# define HEAP_BY_MOD		2
# define HEAP_BY_DESCR		4
# define HEAP_BY_TYPE		5
# define HEAP_BY_RETAINER       6
# define HEAP_BY_LDV            7

# define HEAP_BY_CLOSURE_TYPE   8

    Time        heapProfileInterval; /* time between samples */
    uint32_t    heapProfileIntervalTicks; /* ticks between samples (derived) */
    bool        includeTSOs;


    bool		showCCSOnException;

    uint32_t    maxRetainerSetSize;

    uint32_t    ccsLength;

    const char*         modSelector;
    const char*         descrSelector;
    const char*         typeSelector;
    const char*         ccSelector;
    const char*         ccsSelector;
    const char*         retainerSelector;
    const char*         bioSelector;

} PROFILING_FLAGS;

#define TRACE_NONE      0
#define TRACE_EVENTLOG  1
#define TRACE_STDERR    2

/* See Note [Synchronization of flags and base APIs] */
typedef struct _TRACE_FLAGS {
    int tracing;
    bool timestamp;      /* show timestamp in stderr output */
    bool scheduler;      /* trace scheduler events */
    bool gc;             /* trace GC events */
    bool nonmoving_gc;   /* trace nonmoving GC events */
    bool sparks_sampled; /* trace spark events by a sampled method */
    bool sparks_full;    /* trace spark events 100% accurately */
    bool user;           /* trace user events (emitted from Haskell code) */
    char *trace_output;  /* output filename for eventlog */
} TRACE_FLAGS;

/* See Note [Synchronization of flags and base APIs] */
typedef struct _CONCURRENT_FLAGS {
    Time ctxtSwitchTime;         /* units: TIME_RESOLUTION */
    int ctxtSwitchTicks;         /* derived */
} CONCURRENT_FLAGS;

/*
 * The tickInterval is the time interval between "ticks", ie.
 * timer signals (see Timer.{c,h}).  It is the frequency at
 * which we sample CCCS for profiling.
 *
 * It is changed by the +RTS -V<secs> flag.
 */
#define DEFAULT_TICK_INTERVAL USToTime(10000)

/*
 * When linkerAlwaysPic is true, the runtime linker assume that all object
 * files were compiled with -fPIC -fexternal-dynamic-refs and load them
 * anywhere in the address space.
 */
#if defined(x86_64_HOST_ARCH) && defined(darwin_HOST_OS)
#define DEFAULT_LINKER_ALWAYS_PIC true
#else
#define DEFAULT_LINKER_ALWAYS_PIC false
#endif

/* See Note [Synchronization of flags and base APIs] */
typedef struct _MISC_FLAGS {
    Time    tickInterval;        /* units: TIME_RESOLUTION */
    bool install_signal_handlers;
    bool install_seh_handlers;
    bool generate_dump_file;
    bool generate_stack_trace;
    bool machineReadable;
    bool disableDelayedOsMemoryReturn; /* See Note [MADV_FREE and MADV_DONTNEED].
                                          It's in `MiscFlags` instead of
                                          `GcFlags` because if GHC used madvise()
                                          memory management for non-GC related
                                          tasks in the future, we'd respect it
                                          there as well. */
    bool internalCounters;       /* See Note [Internal Counter Stats] */
    bool linkerAlwaysPic;        /* Assume the object code is always PIC */
    StgWord linkerMemBase;       /* address to ask the OS for memory
                                  * for the linker, NULL ==> off */
} MISC_FLAGS;

/* See Note [Synchronization of flags and base APIs] */
typedef struct _PAR_FLAGS {
  uint32_t       nCapabilities;  /* number of threads to run simultaneously */
  bool           migrate;        /* migrate threads between capabilities */
  uint32_t       maxLocalSparks;
  bool           parGcEnabled;   /* enable parallel GC */
  uint32_t       parGcGen;       /* do parallel GC in this generation
                                  * and higher only */
  bool           parGcLoadBalancingEnabled;
                                 /* enable load-balancing in the
                                  * parallel GC */
  uint32_t       parGcLoadBalancingGen;
                                 /* do load-balancing in this
                                  * generation and higher only */

  uint32_t       parGcNoSyncWithIdle;
                                 /* if a Capability has been idle for
                                  * this many GCs, do not try to wake
                                  * it up when doing a
                                  * non-load-balancing parallel GC.
                                  * (zero disables) */

  uint32_t       parGcThreads;
                                 /* Use this many threads for parallel
                                  * GC (default: use all nNodes). */

  bool           setAffinity;    /* force thread affinity with CPUs */
} PAR_FLAGS;

/* See Note [Synchronization of flags and base APIs] */
typedef struct _TICKY_FLAGS {
    bool showTickyStats;
    FILE   *tickyFile;
} TICKY_FLAGS;

/* Put them together: */

/* See Note [Synchronization of flags and base APIs] */
typedef struct _RTS_FLAGS {
    /* The first portion of RTS_FLAGS is invariant. */
    GC_FLAGS	      GcFlags;
    CONCURRENT_FLAGS  ConcFlags;
    MISC_FLAGS        MiscFlags;
    DEBUG_FLAGS	      DebugFlags;
    COST_CENTRE_FLAGS CcFlags;
    PROFILING_FLAGS   ProfFlags;
    TRACE_FLAGS       TraceFlags;
    TICKY_FLAGS	      TickyFlags;
    PAR_FLAGS	      ParFlags;
} RTS_FLAGS;

#if defined(COMPILING_RTS_MAIN)
extern DLLIMPORT RTS_FLAGS RtsFlags;
#elif IN_STG_CODE
/* Note [RtsFlags is a pointer in STG code]
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * When compiling with IN_STG_CODE the RtsFlags symbol is defined as a pointer.
 * This is necessary because the C code generator can't generate '&label'.
 */
extern RTS_FLAGS RtsFlags[];
#else
extern RTS_FLAGS RtsFlags;
#endif

/*
 * The printf formats are here, so we are less likely to make
 * overly-long filenames (with disastrous results).  No more than 128
 * chars, please!
 */

#define STATS_FILENAME_MAXLEN	128

#define GR_FILENAME_FMT		"%0.124s.gr"
#define HP_FILENAME_FMT		"%0.124s.hp"
#define LIFE_FILENAME_FMT	"%0.122s.life"
#define PROF_FILENAME_FMT	"%0.122s.prof"
#define PROF_FILENAME_FMT_GUM	"%0.118s.%03d.prof"
#define QP_FILENAME_FMT		"%0.124s.qp"
#define STAT_FILENAME_FMT	"%0.122s.stat"
#define TICKY_FILENAME_FMT	"%0.121s.ticky"
#define TIME_FILENAME_FMT	"%0.122s.time"
#define TIME_FILENAME_FMT_GUM	"%0.118s.%03d.time"

/* an "int" so as to match normal "argc" */
/* Now defined in Stg.h (lib/std/cbits need these too.)
extern int     prog_argc;
extern char  **prog_argv;
*/
extern int      rts_argc;  /* ditto */
extern char   **rts_argv;