| 1 | |
| 2 | /* |
| 3 | * arch/ubicom32/mach-common/profpkt.c |
| 4 | * Ubicom32 Profiler packet formats for communication between the linux proc driver and the profiler display tool |
| 5 | * |
| 6 | * (C) Copyright 2009, Ubicom, Inc. |
| 7 | * |
| 8 | * This file is part of the Ubicom32 Linux Kernel Port. |
| 9 | * |
| 10 | * The Ubicom32 Linux Kernel Port is free software: you can redistribute |
| 11 | * it and/or modify it under the terms of the GNU General Public License |
| 12 | * as published by the Free Software Foundation, either version 2 of the |
| 13 | * License, or (at your option) any later version. |
| 14 | * |
| 15 | * The Ubicom32 Linux Kernel Port is distributed in the hope that it |
| 16 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| 17 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 18 | * the GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with the Ubicom32 Linux Kernel Port. If not, |
| 22 | * see <http://www.gnu.org/licenses/>. |
| 23 | */ |
| 24 | |
| 25 | #define PROFILE_PORT 51080 |
| 26 | #define PROFILE_POSIX_NAME_LENGTH 32 |
| 27 | |
| 28 | /* |
| 29 | * profile UDP packet format for communicating between ip3k and host |
| 30 | * |
| 31 | * every packet starts with a header, followed by samples. |
| 32 | * samples are only taken for non-hrt threads that are |
| 33 | * active |
| 34 | */ |
| 35 | #define PROF_MAGIC 0x3ea0 |
| 36 | #define PROF_MAGIC_COUNTERS 0x9ea0 |
| 37 | #define PROF_MAGIC_MAPS 0xaea0 |
| 38 | |
| 39 | /* |
| 40 | * Versions (31 max): |
| 41 | * 1 to 4 were before 6.0 release, development versions |
| 42 | * 5 was forward compatible version, shipped with 6.0 and 6.1 |
| 43 | * 6 adds heap packets, and clock_freq to header, shipped with 6.2 |
| 44 | * 7 adds a sequence numbers to check for dropped packets, shipped with 6.3.5 |
| 45 | * 8 adds mqueue timing information, shipped with 6.3.5 |
| 46 | * 9 adds sdram heap size information, shipped with 6.4 |
| 47 | * 10 adds heapmem heap callers and long latency stack traces. shipped with 6.4 |
| 48 | * 11 adds support for Mars (IP5K). shipped with 6.10 |
| 49 | * 12 adds more support for Mars. Shipped with 7.0 |
| 50 | * 13 adds per sample latency measurement. Shipped with 7.2 |
| 51 | * 14 changes the heap format and adds a string packet. Shipped with 7.4 |
| 52 | * 15 adds dsr stats and posix. shipped with 7.6 |
| 53 | * 16 corrects maximum packet count for Ares. ships with 7.9 |
| 54 | * 17 adds a5 register value to sample |
| 55 | */ |
| 56 | |
| 57 | #define PROFILE_VERSION 17 |
| 58 | #define PROFILE_MAX_PACKET_SIZE 1440 |
| 59 | |
| 60 | #define PROFILE_MAX_THREADS 16 |
| 61 | |
| 62 | /* |
| 63 | * each packet starts with a profile_header, then sample_count samples |
| 64 | * samples are gprof samples of pc, the return address, condition codes, and |
| 65 | * active threads |
| 66 | */ |
| 67 | struct profile_header { |
| 68 | u16_t magic; /* magic number and version */ |
| 69 | u8_t header_size; /* number of bytes in profile header */ |
| 70 | u8_t sample_count; /* number of samples in the packet */ |
| 71 | u32_t clocks; /* clock counter value */ |
| 72 | u32_t instruction_count[PROFILE_MAX_THREADS]; |
| 73 | /* instructions executed per thread */ |
| 74 | u32_t profile_instructions; /* instructions executed by profiler mainline */ |
| 75 | u16_t enabled; /* which threads are enabled */ |
| 76 | u16_t hrt; /* which threads are hrt */ |
| 77 | u16_t high; /* which threads are high priority */ |
| 78 | u16_t profiler_thread; /* which thread runs the profiler */ |
| 79 | u32_t heap_free; /* current free on-cihp heap space in bytes */ |
| 80 | u32_t heap_low_water; /* on-chip heap low water mark */ |
| 81 | u32_t netpage_free; /* number of free on-chip net pages */ |
| 82 | u32_t netpage_low_water; /* low water mark on free on-chip netpages */ |
| 83 | u32_t min_sp[PROFILE_MAX_THREADS]; |
| 84 | /* stack pointer values per thread */ |
| 85 | u32_t clock_freq; /* clock frequency (Hz) of system being analyzed */ |
| 86 | u32_t seq_num; /* to detect dropped profiler packets */ |
| 87 | u32_t timing_sequence; /* sample number since boot */ |
| 88 | u32_t timing_interval; /* second per sample timing interval */ |
| 89 | u32_t timing_worst_time; /* duration of longest finction called, in core clocks */ |
| 90 | u32_t timing_function; /* address of longest function */ |
| 91 | u32_t timing_average; /* average time of all functions in last interval */ |
| 92 | u32_t timing_count; /* number of functions called in last interval */ |
| 93 | u32_t extheap_free; /* current free extmem heap space in bytes */ |
| 94 | u32_t extheap_low_water; /* extmem heap low water mark */ |
| 95 | u32_t cpu_id; /* CHIP_ID register contents */ |
| 96 | u32_t perf_counters[4]; /* contents of the CPU performance counters */ |
| 97 | u8_t perf_config[4]; /* what is being counted */ |
| 98 | u32_t ddr_freq; /* DDR clock frequency */ |
| 99 | u32_t extnetpage_free; /* number of free off chip net pages */ |
| 100 | u32_t extnetpage_low_water; /* low water mark on off-chip free netpages */ |
| 101 | u32_t dsr_max_latency; /* max time to process a dsr interrupt, in clocks, since last packet */ |
| 102 | u32_t dsr_ave_latency; /* average dsr latency over last DSR_STATS_RECENT_COUNT interrupts */ |
| 103 | u32_t dsr_count; /* number of dsr interrupts since last packet */ |
| 104 | }; |
| 105 | |
| 106 | struct profile_header_counters { |
| 107 | u16_t magic; |
| 108 | u16_t ultra_count; /* how many ultra counters follow this */ |
| 109 | u32_t ultra_sample_time; /* in chip clocks */ |
| 110 | u32_t linux_count; /* how many linux counters follow this */ |
| 111 | u32_t linux_sample_time; |
| 112 | }; |
| 113 | |
| 114 | /* |
| 115 | * values chosen so all counter values fit in a single 1400 byte UDP packet |
| 116 | */ |
| 117 | #define PROFILE_COUNTER_NAME_LENGTH 20 |
| 118 | #define PROFILE_MAX_COUNTERS ((PROFILE_MAX_PACKET_SIZE - sizeof(struct profile_header_counters)) / (PROFILE_COUNTER_NAME_LENGTH + 4)) |
| 119 | |
| 120 | struct profile_counter_pkt { |
| 121 | char name[PROFILE_COUNTER_NAME_LENGTH]; |
| 122 | unsigned int value; |
| 123 | }; |
| 124 | |
| 125 | /* |
| 126 | * send memory maps from linux to profiler tool |
| 127 | */ |
| 128 | |
| 129 | struct profile_header_maps { |
| 130 | u16_t magic; |
| 131 | u16_t count; |
| 132 | u32_t page_shift; |
| 133 | }; |
| 134 | |
| 135 | #define PROFILE_MAP_NUM_TYPES 32 |
| 136 | |
| 137 | /* types 0-15: size field is order. True size is 2^order */ |
| 138 | #define PROFILE_MAP_TYPE_UNKNOWN 0 |
| 139 | #define PROFILE_MAP_TYPE_FREE 1 |
| 140 | #define PROFILE_MAP_TYPE_SMALL 2 |
| 141 | #define PROFILE_MAP_TYPE_FS 3 |
| 142 | /* types 16-31: size field is pages. True size is (1 << PAGE_SHIFT) * size */ |
| 143 | #define PROFILE_MAP_SIZE_TYPE 16 |
| 144 | #define PROFILE_MAP_TYPE_TEXT 16 |
| 145 | #define PROFILE_MAP_TYPE_STACK 17 |
| 146 | #define PROFILE_MAP_TYPE_APP_DATA 18 |
| 147 | #define PROFILE_MAP_TYPE_CACHE 19 |
| 148 | #define PROFILE_MAP_RESERVED 24 |
| 149 | |
| 150 | #define PROFILE_MAP_TYPE_SHIFT 11 |
| 151 | #define PROFILE_MAP_SIZE_MASK 0x7ff |
| 152 | |
| 153 | struct profile_map { |
| 154 | u16_t start; /* start page number of segment, relative to start of DRAM */ |
| 155 | u16_t type_size; /* type (4 bits) of the segment and size in pages (12 bits) */ |
| 156 | }; |
| 157 | |
| 158 | #define PROFILE_MAX_MAPS (PROFILE_MAX_PACKET_SIZE - sizeof(struct profile_header_maps)) / sizeof(struct profile_map) |
| 159 | |
