The Android Open Source Project | 10e23ee | 2009-03-03 19:30:30 -0800 | [diff] [blame] | 1 | /** |
| 2 | * @file daemon/opd_spu.c |
| 3 | * Processing the sample buffer for Cell BE SPU profile |
| 4 | * |
| 5 | * @remark Copyright 2007 OProfile authors |
| 6 | * @remark Read the file COPYING |
| 7 | * |
| 8 | * @author Maynard Johnson |
| 9 | * (C) Copyright IBM Corporation 2007 |
| 10 | */ |
| 11 | |
| 12 | #include "opd_interface.h" |
| 13 | #include "opd_printf.h" |
| 14 | #include "opd_sfile.h" |
| 15 | #include "opd_stats.h" |
| 16 | #include "opd_trans.h" |
| 17 | #include "op_libiberty.h" |
| 18 | |
| 19 | #include <stdlib.h> |
| 20 | #include <stdio.h> |
| 21 | |
| 22 | struct spu_context_info { |
| 23 | pid_t tid; |
| 24 | pid_t tgid; |
| 25 | cookie_t app_cookie; |
| 26 | uint64_t embedded_offset; |
| 27 | cookie_t spu_cookie; |
| 28 | }; |
| 29 | |
| 30 | static struct spu_context_info * spu_context_cache; |
| 31 | |
| 32 | /* Forward declaration */ |
| 33 | static void process_spu_samples(struct transient * trans); |
| 34 | |
| 35 | void (*special_processor)(struct transient *); |
| 36 | |
| 37 | /* |
| 38 | * This function is called when the first value found in the |
| 39 | * buffer (after the beginning ESCAPE_CODE) is SPU_PROFILING_CODE. |
| 40 | * Once we get here, the rest of the processing of the buffer is |
| 41 | * Cell-SPU-specific, so we do not need to return until the |
| 42 | * trans.buffer is empty. |
| 43 | */ |
| 44 | void code_spu_profiling(struct transient * trans) |
| 45 | { |
| 46 | /* Next value in buffer is the number of SPUs. */ |
| 47 | unsigned long long num_spus = pop_buffer_value(trans); |
| 48 | /* Free the cache from previous run */ |
| 49 | free(spu_context_cache); |
| 50 | spu_context_cache = xmalloc(sizeof(struct spu_context_info) * num_spus); |
| 51 | special_processor = process_spu_samples; |
| 52 | process_spu_samples(trans); |
| 53 | } |
| 54 | |
| 55 | void code_spu_ctx_switch(struct transient * trans) |
| 56 | { |
| 57 | clear_trans_current(trans); |
| 58 | |
| 59 | if (!enough_remaining(trans, 6)) { |
| 60 | trans->remaining = 0; |
| 61 | return; |
| 62 | } |
| 63 | |
| 64 | /* First value in the buffer for an SPU context switch is |
| 65 | * the SPU number. For SPU profiling, 'cpu' = 'spu'. |
| 66 | */ |
| 67 | trans->cpu = pop_buffer_value(trans); |
| 68 | trans->tid = pop_buffer_value(trans); |
| 69 | trans->tgid = pop_buffer_value(trans); |
| 70 | trans->app_cookie = pop_buffer_value(trans); |
| 71 | |
| 72 | if (vmisc) { |
| 73 | char const * app = find_cookie(trans->app_cookie); |
| 74 | printf("SPU_CTX_SWITCH to tid %lu, tgid %lu, cookie %llx(%s)\n", |
| 75 | (unsigned long)trans->tid, (unsigned long)trans->tgid, |
| 76 | trans->app_cookie, app ? app : "none"); |
| 77 | } |
| 78 | |
| 79 | /* The trans->cookie will point to the binary file where the SPU ELF |
| 80 | * can be found. If the SPU ELF is embedded, it may be embedded in |
| 81 | * either the executable application binary or a shared lib. If shared |
| 82 | * library, then trans->cookie will differ from the previously obtained |
| 83 | * trans->app_cookie. For the non-embedded case, trans->cookie always |
| 84 | * points to a separate binary file. |
| 85 | */ |
| 86 | trans->cookie = pop_buffer_value(trans); |
| 87 | trans->embedded_offset = pop_buffer_value(trans); |
| 88 | } |
| 89 | |
| 90 | |
| 91 | static void cache_spu_context_info(struct transient * trans) |
| 92 | { |
| 93 | int i = trans->cpu; |
| 94 | spu_context_cache[i].tid = trans->tid; |
| 95 | spu_context_cache[i].tgid = trans->tgid; |
| 96 | spu_context_cache[i].app_cookie = trans->app_cookie; |
| 97 | spu_context_cache[i].embedded_offset = trans->embedded_offset; |
| 98 | spu_context_cache[i].spu_cookie = trans->cookie; |
| 99 | } |
| 100 | |
| 101 | static void update_trans_for_spu(struct transient * trans) |
| 102 | { |
| 103 | int i = trans->cpu; |
| 104 | trans->tid = spu_context_cache[i].tid; |
| 105 | trans->tgid = spu_context_cache[i].tgid; |
| 106 | trans->app_cookie = spu_context_cache[i].app_cookie; |
| 107 | trans->embedded_offset = spu_context_cache[i].embedded_offset; |
| 108 | trans->cookie = spu_context_cache[i].spu_cookie; |
| 109 | } |
| 110 | #define SPU_NUM_MASK 0xFFFFFFFF00000000ULL |
| 111 | #define SPU_CYCLES_COUNTER 0 |
| 112 | |
| 113 | static void opd_put_spu_sample |
| 114 | (struct transient * trans, unsigned long long pc) |
| 115 | { |
| 116 | unsigned long spu_number = (pc & SPU_NUM_MASK) >> 32; |
| 117 | if (trans->cpu != spu_number) { |
| 118 | trans->cpu = spu_number; |
| 119 | clear_trans_current(trans); |
| 120 | update_trans_for_spu(trans); |
| 121 | } |
| 122 | /* get the current sfile if needed */ |
| 123 | if (!trans->current) |
| 124 | trans->current = sfile_find(trans); |
| 125 | |
| 126 | if (trans->tracing != TRACING_ON) |
| 127 | trans->event = SPU_CYCLES_COUNTER; |
| 128 | |
| 129 | trans->pc = (pc & ~SPU_NUM_MASK); |
| 130 | /* log the sample or arc */ |
| 131 | sfile_log_sample(trans); |
| 132 | |
| 133 | /* switch to trace mode */ |
| 134 | if (trans->tracing == TRACING_START) |
| 135 | trans->tracing = TRACING_ON; |
| 136 | |
| 137 | update_trans_last(trans); |
| 138 | } |
| 139 | |
| 140 | /* |
| 141 | * This function processes SPU context switches and |
| 142 | * SPU program counter samples. After processing a |
| 143 | * context switch (via handlers[code)), we cache the |
| 144 | * SPU context information that has been temporarily |
| 145 | * stored in trans. |
| 146 | */ |
| 147 | static void process_spu_samples(struct transient * trans) |
| 148 | { |
| 149 | unsigned long long code; |
| 150 | trans->in_kernel = 0; |
| 151 | while (trans->remaining) { |
| 152 | code = pop_buffer_value(trans); |
| 153 | |
| 154 | if (!is_escape_code(code)) { |
| 155 | opd_put_spu_sample(trans, code); |
| 156 | continue; |
| 157 | } |
| 158 | |
| 159 | if (!trans->remaining) { |
| 160 | verbprintf(vmisc, "Dangling ESCAPE_CODE.\n"); |
| 161 | opd_stats[OPD_DANGLING_CODE]++; |
| 162 | break; |
| 163 | } |
| 164 | |
| 165 | /* started with ESCAPE_CODE, next is type */ |
| 166 | code = pop_buffer_value(trans); |
| 167 | |
| 168 | if (code >= LAST_CODE) { |
| 169 | fprintf(stderr, "Unknown code %llu\n", code); |
| 170 | abort(); |
| 171 | } |
| 172 | |
| 173 | handlers[code](trans); |
| 174 | cache_spu_context_info(trans); |
| 175 | } |
| 176 | } |