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/*
* arch/ubicom32/mach-common/profpkt.c
* Ubicom32 Profiler packet formats for communication between the linux proc driver and the profiler display tool
*
* (C) Copyright 2009, Ubicom, Inc.
*
* This file is part of the Ubicom32 Linux Kernel Port.
*
* The Ubicom32 Linux Kernel Port is free software: you can redistribute
* it and/or modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, either version 2 of the
* License, or (at your option) any later version.
*
* The Ubicom32 Linux Kernel Port is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the Ubicom32 Linux Kernel Port. If not,
* see <http://www.gnu.org/licenses/>.
*/
#define PROFILE_PORT 51080
#define PROFILE_POSIX_NAME_LENGTH 32
/*
* profile UDP packet format for communicating between ip3k and host
*
* every packet starts with a header, followed by samples.
* samples are only taken for non-hrt threads that are
* active
*/
#define PROF_MAGIC 0x3ea0
#define PROF_MAGIC_COUNTERS 0x9ea0
#define PROF_MAGIC_MAPS 0xaea0
/*
* Versions (31 max):
* 1 to 4 were before 6.0 release, development versions
* 5 was forward compatible version, shipped with 6.0 and 6.1
* 6 adds heap packets, and clock_freq to header, shipped with 6.2
* 7 adds a sequence numbers to check for dropped packets, shipped with 6.3.5
* 8 adds mqueue timing information, shipped with 6.3.5
* 9 adds sdram heap size information, shipped with 6.4
* 10 adds heapmem heap callers and long latency stack traces. shipped with 6.4
* 11 adds support for Mars (IP5K). shipped with 6.10
* 12 adds more support for Mars. Shipped with 7.0
* 13 adds per sample latency measurement. Shipped with 7.2
* 14 changes the heap format and adds a string packet. Shipped with 7.4
* 15 adds dsr stats and posix. shipped with 7.6
* 16 corrects maximum packet count for Ares. ships with 7.9
* 17 adds a5 register value to sample
*/
#define PROFILE_VERSION 17
#define PROFILE_MAX_PACKET_SIZE 1440
#define PROFILE_MAX_THREADS 16
/*
* each packet starts with a profile_header, then sample_count samples
* samples are gprof samples of pc, the return address, condition codes, and
* active threads
*/
struct profile_header {
u16_t magic; /* magic number and version */
u8_t header_size; /* number of bytes in profile header */
u8_t sample_count; /* number of samples in the packet */
u32_t clocks; /* clock counter value */
u32_t instruction_count[PROFILE_MAX_THREADS];
/* instructions executed per thread */
u32_t profile_instructions; /* instructions executed by profiler mainline */
u16_t enabled; /* which threads are enabled */
u16_t hrt; /* which threads are hrt */
u16_t high; /* which threads are high priority */
u16_t profiler_thread; /* which thread runs the profiler */
u32_t heap_free; /* current free on-cihp heap space in bytes */
u32_t heap_low_water; /* on-chip heap low water mark */
u32_t netpage_free; /* number of free on-chip net pages */
u32_t netpage_low_water; /* low water mark on free on-chip netpages */
u32_t min_sp[PROFILE_MAX_THREADS];
/* stack pointer values per thread */
u32_t clock_freq; /* clock frequency (Hz) of system being analyzed */
u32_t seq_num; /* to detect dropped profiler packets */
u32_t timing_sequence; /* sample number since boot */
u32_t timing_interval; /* second per sample timing interval */
u32_t timing_worst_time; /* duration of longest finction called, in core clocks */
u32_t timing_function; /* address of longest function */
u32_t timing_average; /* average time of all functions in last interval */
u32_t timing_count; /* number of functions called in last interval */
u32_t extheap_free; /* current free extmem heap space in bytes */
u32_t extheap_low_water; /* extmem heap low water mark */
u32_t cpu_id; /* CHIP_ID register contents */
u32_t perf_counters[4]; /* contents of the CPU performance counters */
u8_t perf_config[4]; /* what is being counted */
u32_t ddr_freq; /* DDR clock frequency */
u32_t extnetpage_free; /* number of free off chip net pages */
u32_t extnetpage_low_water; /* low water mark on off-chip free netpages */
u32_t dsr_max_latency; /* max time to process a dsr interrupt, in clocks, since last packet */
u32_t dsr_ave_latency; /* average dsr latency over last DSR_STATS_RECENT_COUNT interrupts */
u32_t dsr_count; /* number of dsr interrupts since last packet */
};
struct profile_header_counters {
u16_t magic;
u16_t ultra_count; /* how many ultra counters follow this */
u32_t ultra_sample_time; /* in chip clocks */
u32_t linux_count; /* how many linux counters follow this */
u32_t linux_sample_time;
};
/*
* values chosen so all counter values fit in a single 1400 byte UDP packet
*/
#define PROFILE_COUNTER_NAME_LENGTH 20
#define PROFILE_MAX_COUNTERS ((PROFILE_MAX_PACKET_SIZE - sizeof(struct profile_header_counters)) / (PROFILE_COUNTER_NAME_LENGTH + 4))
struct profile_counter_pkt {
char name[PROFILE_COUNTER_NAME_LENGTH];
unsigned int value;
};
/*
* send memory maps from linux to profiler tool
*/
struct profile_header_maps {
u16_t magic;
u16_t count;
u32_t page_shift;
};
#define PROFILE_MAP_NUM_TYPES 32
/* types 0-15: size field is order. True size is 2^order */
#define PROFILE_MAP_TYPE_UNKNOWN 0
#define PROFILE_MAP_TYPE_FREE 1
#define PROFILE_MAP_TYPE_SMALL 2
#define PROFILE_MAP_TYPE_FS 3
/* types 16-31: size field is pages. True size is (1 << PAGE_SHIFT) * size */
#define PROFILE_MAP_SIZE_TYPE 16
#define PROFILE_MAP_TYPE_TEXT 16
#define PROFILE_MAP_TYPE_STACK 17
#define PROFILE_MAP_TYPE_APP_DATA 18
#define PROFILE_MAP_TYPE_CACHE 19
#define PROFILE_MAP_RESERVED 24
#define PROFILE_MAP_TYPE_SHIFT 11
#define PROFILE_MAP_SIZE_MASK 0x7ff
struct profile_map {
u16_t start; /* start page number of segment, relative to start of DRAM */
u16_t type_size; /* type (4 bits) of the segment and size in pages (12 bits) */
};
#define PROFILE_MAX_MAPS (PROFILE_MAX_PACKET_SIZE - sizeof(struct profile_header_maps)) / sizeof(struct profile_map)
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