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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 26 | pmbaty | 1 | /* ACC -- Automatic Compiler Configuration |
| 2 | |||
| 3 | Copyright (C) 1996-2004 Markus Franz Xaver Johannes Oberhumer |
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| 4 | All Rights Reserved. |
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| 5 | |||
| 6 | This software is a copyrighted work licensed under the terms of |
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| 7 | the GNU General Public License. Please consult the file "ACC_LICENSE" |
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| 8 | for details. |
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| 9 | |||
| 10 | Markus F.X.J. Oberhumer |
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| 11 | <markus@oberhumer.com> |
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| 12 | http://www.oberhumer.com/ |
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| 13 | */ |
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| 14 | |||
| 15 | |||
| 16 | #define __ACCLIB_PERFCTR_CH_INCLUDED 1 |
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| 17 | #if !defined(ACCLIB_PUBLIC) |
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| 18 | # define ACCLIB_PUBLIC(r,f) r __ACCLIB_FUNCNAME(f) |
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| 19 | #endif |
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| 20 | |||
| 21 | |||
| 22 | #if (ACC_OS_POSIX_LINUX) |
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| 23 | /* see http://user.it.uu.se/~mikpe/linux/perfctr/ */ |
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| 24 | #if defined(__cplusplus) |
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| 25 | extern "C" { |
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| 26 | #include <libperfctr.h> |
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| 27 | } |
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| 28 | #else |
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| 29 | #include <libperfctr.h> |
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| 30 | #endif |
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| 31 | #endif |
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| 32 | |||
| 33 | |||
| 34 | /************************************************************************* |
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| 35 | // |
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| 36 | **************************************************************************/ |
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| 37 | |||
| 38 | ACCLIB_PUBLIC(int, acc_perfctr_open) (acc_perfctr_handle_p h) |
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| 39 | { |
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| 40 | memset(h, 0, sizeof(*h)); |
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| 41 | #if (ACC_OS_POSIX_LINUX) |
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| 42 | { |
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| 43 | struct vperfctr* handle; |
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| 44 | struct perfctr_info info; |
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| 45 | struct vperfctr_control control; |
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| 46 | struct perfctr_cpu_control* const cc = &control.cpu_control; |
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| 47 | /* open */ |
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| 48 | handle = vperfctr_open(); |
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| 49 | if (!handle) goto error; |
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| 50 | /* get info */ |
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| 51 | if (vperfctr_info(handle, &info) < 0) goto error; |
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| 52 | h->cpu_type = info.cpu_type; |
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| 53 | h->cpu_features = info.cpu_features; |
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| 54 | h->cpu_khz = info.cpu_khz; |
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| 55 | h->cpu_nrctrs = perfctr_info_nrctrs(&info); |
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| 56 | h->cpu_name = perfctr_info_cpu_name(&info); |
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| 57 | /* setup control */ |
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| 58 | memset(&control, 0, sizeof(control)); |
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| 59 | switch (h->cpu_type) { |
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| 60 | #if (ACC_ARCH_IA32) |
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| 61 | case PERFCTR_X86_WINCHIP_C6: |
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| 62 | case PERFCTR_X86_WINCHIP_2: |
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| 63 | break; /* no working TSC available */ |
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| 64 | case PERFCTR_X86_AMD_K7: |
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| 65 | #endif |
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| 66 | #if (ACC_ARCH_AMD64 || ACC_ARCH_IA32) |
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| 67 | case PERFCTR_X86_AMD_K8: |
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| 68 | case PERFCTR_X86_AMD_K8C: |
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| 69 | cc->tsc_on = 1; cc->nractrs = 2; |
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| 70 | /* event 0xC0 (RETIRED_INSNS), count at CPL > 0, Enable */ |
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| 71 | cc->pmc_map[0] = 0; |
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| 72 | cc->evntsel[0] = 0xC0 | (1 << 16) | (1 << 22); |
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| 73 | /* event 0xC1 (RETIRED_OPS), count at CPL > 0, Enable */ |
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| 74 | cc->pmc_map[1] = 1; |
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| 75 | cc->evntsel[1] = 0xC1 | (1 << 16) | (1 << 22); |
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| 76 | break; |
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| 77 | #endif |
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| 78 | default: |
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| 79 | cc->tsc_on = 1; |
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| 80 | break; |
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| 81 | } |
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| 82 | if (cc->nractrs > h->cpu_nrctrs) cc->nractrs = h->cpu_nrctrs; |
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| 83 | if (vperfctr_control(handle, &control) < 0) goto error; |
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| 84 | /* success */ |
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| 85 | h->h = (void*) handle; |
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| 86 | return 0; |
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| 87 | error: |
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| 88 | if (handle) { |
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| 89 | vperfctr_stop(handle); |
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| 90 | vperfctr_close(handle); |
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| 91 | } |
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| 92 | } |
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| 93 | #endif |
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| 94 | return -1; |
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| 95 | } |
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| 96 | |||
| 97 | |||
| 98 | ACCLIB_PUBLIC(int, acc_perfctr_close) (acc_perfctr_handle_p h) |
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| 99 | { |
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| 100 | if (h->h) { |
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| 101 | #if (ACC_OS_POSIX_LINUX) |
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| 102 | struct vperfctr* handle = (struct vperfctr*) h->h; |
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| 103 | vperfctr_stop(handle); |
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| 104 | vperfctr_close(handle); |
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| 105 | #endif |
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| 106 | h->h = 0; |
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| 107 | } |
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| 108 | return 0; |
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| 109 | } |
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| 110 | |||
| 111 | |||
| 112 | /************************************************************************* |
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| 113 | // |
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| 114 | **************************************************************************/ |
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| 115 | |||
| 116 | ACCLIB_PUBLIC(void, acc_perfctr_read) (acc_perfctr_handle_p h, acc_perfctr_clock_p c) |
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| 117 | { |
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| 118 | if (h->h) { |
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| 119 | #if (ACC_OS_POSIX_LINUX) |
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| 120 | struct vperfctr* handle = (struct vperfctr*) h->h; |
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| 121 | vperfctr_read_ctrs(handle, (struct perfctr_sum_ctrs*) c); |
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| 122 | #else |
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| 123 | memset(c, 0, sizeof(*c)); |
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| 124 | #endif |
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| 125 | } else |
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| 126 | memset(c, 0, sizeof(*c)); |
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| 127 | } |
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| 128 | |||
| 129 | |||
| 130 | /************************************************************************* |
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| 131 | // |
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| 132 | **************************************************************************/ |
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| 133 | |||
| 134 | ACCLIB_PUBLIC(double, acc_perfctr_get_elapsed) (acc_perfctr_handle_p h, const acc_perfctr_clock_p start, const acc_perfctr_clock_p stop) |
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| 135 | { |
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| 136 | #if (ACC_OS_POSIX_LINUX) |
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| 137 | acc_uint64l_t tsc = stop->tsc - start->tsc; |
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| 138 | return ((double)tsc / h->cpu_khz) / 1000.0; |
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| 139 | #else |
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| 140 | ACC_UNUSED(h); ACC_UNUSED(start); ACC_UNUSED(stop); return 0; |
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| 141 | #endif |
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| 142 | } |
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| 143 | |||
| 144 | |||
| 145 | ACCLIB_PUBLIC(double, acc_perfctr_get_elapsed_tsc) (acc_perfctr_handle_p h, acc_uint64l_t tsc) |
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| 146 | { |
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| 147 | #if (ACC_OS_POSIX_LINUX) |
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| 148 | return ((double)tsc / h->cpu_khz) / 1000.0; |
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| 149 | #else |
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| 150 | ACC_UNUSED(h); ACC_UNUSED(tsc); return 0; |
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| 151 | #endif |
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| 152 | } |
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| 153 | |||
| 154 | |||
| 155 | /* |
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| 156 | vi:ts=4:et |
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| 157 | */ |