2 * kmp_utility.cpp -- Utility routines for the OpenMP support library.
5 //===----------------------------------------------------------------------===//
7 // The LLVM Compiler Infrastructure
9 // This file is dual licensed under the MIT and the University of Illinois Open
10 // Source Licenses. See LICENSE.txt for details.
12 //===----------------------------------------------------------------------===//
17 #include "kmp_wrapper_getpid.h"
20 static const char *unknown = "unknown";
22 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
24 /* NOTE: If called before serial_initialize (i.e. from runtime_initialize), then
25 the debugging package has not been initialized yet, and only "0" will print
26 debugging output since the environment variables have not been read. */
29 static int trace_level = 5;
32 /* LOG_ID_BITS = ( 1 + floor( log_2( max( log_per_phy - 1, 1 ))))
33 * APIC_ID = (PHY_ID << LOG_ID_BITS) | LOG_ID
34 * PHY_ID = APIC_ID >> LOG_ID_BITS
36 int __kmp_get_physical_id(int log_per_phy, int apic_id) {
37 int index_lsb, index_msb, temp;
39 if (log_per_phy > 1) {
44 while ((temp & 1) == 0) {
50 while ((temp & 0x80000000) == 0) {
55 /* If >1 bits were set in log_per_phy, choose next higher power of 2 */
56 if (index_lsb != index_msb)
59 return ((int)(apic_id >> index_msb));
66 * LOG_ID_BITS = ( 1 + floor( log_2( max( log_per_phy - 1, 1 ))))
67 * APIC_ID = (PHY_ID << LOG_ID_BITS) | LOG_ID
68 * LOG_ID = APIC_ID & (( 1 << LOG_ID_BITS ) - 1 )
70 int __kmp_get_logical_id(int log_per_phy, int apic_id) {
79 for (current_bit = 1; log_per_phy != 0; current_bit <<= 1) {
80 if (log_per_phy & current_bit) {
81 log_per_phy &= ~current_bit;
86 /* If exactly 1 bit was set in log_per_phy, choose next lower power of 2 */
91 return ((int)((current_bit - 1) & apic_id));
94 static kmp_uint64 __kmp_parse_frequency( // R: Frequency in Hz.
95 char const *frequency // I: Float number and unit: MHz, GHz, or TGz.
100 kmp_uint64 result = 0; /* Zero is a better unknown value than all ones. */
102 if (frequency == NULL) {
105 value = strtod(frequency, &unit);
107 value <= DBL_MAX) { // Good value (not overflow, underflow, etc).
108 if (strcmp(unit, "MHz") == 0) {
109 value = value * 1.0E+6;
110 } else if (strcmp(unit, "GHz") == 0) {
111 value = value * 1.0E+9;
112 } else if (strcmp(unit, "THz") == 0) {
113 value = value * 1.0E+12;
114 } else { // Wrong unit.
121 } // func __kmp_parse_cpu_frequency
123 void __kmp_query_cpuid(kmp_cpuinfo_t *p) {
124 struct kmp_cpuid buf;
133 p->sse2 = 1; // Assume SSE2 by default.
135 __kmp_x86_cpuid(0, 0, &buf);
137 KA_TRACE(trace_level,
138 ("INFO: CPUID %d: EAX=0x%08X EBX=0x%08X ECX=0x%08X EDX=0x%08X\n", 0,
139 buf.eax, buf.ebx, buf.ecx, buf.edx));
147 kmp_uint32 t, data[4];
149 __kmp_x86_cpuid(1, 0, &buf);
150 KA_TRACE(trace_level,
151 ("INFO: CPUID %d: EAX=0x%08X EBX=0x%08X ECX=0x%08X EDX=0x%08X\n",
152 1, buf.eax, buf.ebx, buf.ecx, buf.edx));
155 #define get_value(reg, lo, mask) (((reg) >> (lo)) & (mask))
157 p->signature = buf.eax;
158 p->family = get_value(buf.eax, 20, 0xff) + get_value(buf.eax, 8, 0x0f);
160 (get_value(buf.eax, 16, 0x0f) << 4) + get_value(buf.eax, 4, 0x0f);
161 p->stepping = get_value(buf.eax, 0, 0x0f);
165 KA_TRACE(trace_level, (" family = %d, model = %d, stepping = %d\n",
166 p->family, p->model, p->stepping));
169 for (t = buf.ebx, i = 0; i < 4; t >>= 8, ++i) {
170 data[i] = (t & 0xff);
173 p->sse2 = (buf.edx >> 26) & 1;
177 if ((buf.edx >> 4) & 1) {
178 /* TSC - Timestamp Counter Available */
179 KA_TRACE(trace_level, (" TSC"));
181 if ((buf.edx >> 8) & 1) {
182 /* CX8 - CMPXCHG8B Instruction Available */
183 KA_TRACE(trace_level, (" CX8"));
185 if ((buf.edx >> 9) & 1) {
186 /* APIC - Local APIC Present (multi-processor operation support */
187 KA_TRACE(trace_level, (" APIC"));
189 if ((buf.edx >> 15) & 1) {
190 /* CMOV - Conditional MOVe Instruction Available */
191 KA_TRACE(trace_level, (" CMOV"));
193 if ((buf.edx >> 18) & 1) {
194 /* PSN - Processor Serial Number Available */
195 KA_TRACE(trace_level, (" PSN"));
197 if ((buf.edx >> 19) & 1) {
198 /* CLFULSH - Cache Flush Instruction Available */
200 data[1] * 8; /* Bits 15-08: CLFLUSH line size = 8 (64 bytes) */
201 KA_TRACE(trace_level, (" CLFLUSH(%db)", cflush_size));
203 if ((buf.edx >> 21) & 1) {
204 /* DTES - Debug Trace & EMON Store */
205 KA_TRACE(trace_level, (" DTES"));
207 if ((buf.edx >> 22) & 1) {
208 /* ACPI - ACPI Support Available */
209 KA_TRACE(trace_level, (" ACPI"));
211 if ((buf.edx >> 23) & 1) {
212 /* MMX - Multimedia Extensions */
213 KA_TRACE(trace_level, (" MMX"));
215 if ((buf.edx >> 25) & 1) {
216 /* SSE - SSE Instructions */
217 KA_TRACE(trace_level, (" SSE"));
219 if ((buf.edx >> 26) & 1) {
220 /* SSE2 - SSE2 Instructions */
221 KA_TRACE(trace_level, (" SSE2"));
223 if ((buf.edx >> 27) & 1) {
224 /* SLFSNP - Self-Snooping Cache */
225 KA_TRACE(trace_level, (" SLFSNP"));
227 #endif /* KMP_DEBUG */
229 if ((buf.edx >> 28) & 1) {
230 /* Bits 23-16: Logical Processors per Physical Processor (1 for P4) */
231 log_per_phy = data[2];
232 p->apic_id = data[3]; /* Bits 31-24: Processor Initial APIC ID (X) */
233 KA_TRACE(trace_level, (" HT(%d TPUs)", log_per_phy));
235 if (log_per_phy > 1) {
236 /* default to 1k FOR JT-enabled processors (4k on OS X*) */
238 p->cpu_stackoffset = 4 * 1024;
240 p->cpu_stackoffset = 1 * 1024;
244 p->physical_id = __kmp_get_physical_id(log_per_phy, p->apic_id);
245 p->logical_id = __kmp_get_logical_id(log_per_phy, p->apic_id);
248 if ((buf.edx >> 29) & 1) {
249 /* ATHROTL - Automatic Throttle Control */
250 KA_TRACE(trace_level, (" ATHROTL"));
252 KA_TRACE(trace_level, (" ]\n"));
254 for (i = 2; i <= max_arg; ++i) {
255 __kmp_x86_cpuid(i, 0, &buf);
256 KA_TRACE(trace_level,
257 ("INFO: CPUID %d: EAX=0x%08X EBX=0x%08X ECX=0x%08X EDX=0x%08X\n",
258 i, buf.eax, buf.ebx, buf.ecx, buf.edx));
261 #if KMP_USE_ADAPTIVE_LOCKS
264 /* RTM bit CPUID.07:EBX, bit 11 */
265 __kmp_x86_cpuid(7, 0, &buf);
266 p->rtm = (buf.ebx >> 11) & 1;
267 KA_TRACE(trace_level, (" RTM"));
272 { // Parse CPU brand string for frequency, saving the string for later.
274 kmp_cpuid_t *base = (kmp_cpuid_t *)&p->name[0];
276 // Get CPU brand string.
277 for (i = 0; i < 3; ++i) {
278 __kmp_x86_cpuid(0x80000002 + i, 0, base + i);
280 p->name[sizeof(p->name) - 1] = 0; // Just in case. ;-)
281 KA_TRACE(trace_level, ("cpu brand string: \"%s\"\n", &p->name[0]));
284 p->frequency = __kmp_parse_frequency(strrchr(&p->name[0], ' '));
285 KA_TRACE(trace_level,
286 ("cpu frequency from brand string: %" KMP_UINT64_SPEC "\n",
291 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */
293 void __kmp_expand_host_name(char *buffer, size_t size) {
294 KMP_DEBUG_ASSERT(size >= sizeof(unknown));
299 if (!GetComputerNameA(buffer, &s))
300 KMP_STRCPY_S(buffer, size, unknown);
303 buffer[size - 2] = 0;
304 if (gethostname(buffer, size) || buffer[size - 2] != 0)
305 KMP_STRCPY_S(buffer, size, unknown);
309 /* Expand the meta characters in the filename:
310 * Currently defined characters are:
312 * %P the number of threads used.
313 * %I the unique identifier for this run.
316 void __kmp_expand_file_name(char *result, size_t rlen, char *pattern) {
317 char *pos = result, *end = result + rlen - 1;
319 int default_cpu_width = 1;
322 KMP_DEBUG_ASSERT(rlen > 0);
326 for (i = __kmp_xproc; i >= 10; i /= 10, ++default_cpu_width)
330 if (pattern != NULL) {
331 while (*pattern != '\0' && pos < end) {
332 if (*pattern != '%') {
335 char *old_pattern = pattern;
337 int cpu_width = default_cpu_width;
341 if (*pattern >= '0' && *pattern <= '9') {
344 width = (width * 10) + *pattern++ - '0';
345 } while (*pattern >= '0' && *pattern <= '9');
346 if (width < 0 || width > 1024)
355 __kmp_expand_host_name(buffer, sizeof(buffer));
356 KMP_STRNCPY(pos, buffer, end - pos + 1);
366 snp_result = KMP_SNPRINTF(pos, end - pos + 1, "%0*d", cpu_width,
367 __kmp_dflt_team_nth);
368 if (snp_result >= 0 && snp_result <= end - pos) {
378 #if KMP_ARCH_X86_64 && defined(__MINGW32__)
379 snp_result = KMP_SNPRINTF(pos, end - pos + 1, "%0*lld", width, id);
381 snp_result = KMP_SNPRINTF(pos, end - pos + 1, "%0*d", width, id);
383 if (snp_result >= 0 && snp_result <= end - pos) {
398 pattern = old_pattern + 1;
404 /* TODO: How do we get rid of this? */
405 if (*pattern != '\0')
406 KMP_FATAL(FileNameTooLong);