diff --git a/driver/gator_main.c b/driver/gator_main.c
index fff2d190e310a29411487cc9d8da431c24785902..88650f60bd5f436fc66dfadacb65a1544e30e947 100644 (file)
--- a/driver/gator_main.c
+++ b/driver/gator_main.c
/**
- * Copyright (C) ARM Limited 2010-2012. All rights reserved.
+ * Copyright (C) ARM Limited 2010-2013. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
*
*/
-static unsigned long gator_protocol_version = 8;
+// This version must match the gator daemon version
+static unsigned long gator_protocol_version = 13;
#include <linux/slab.h>
#include <linux/cpu.h>
#include <linux/suspend.h>
#include <linux/module.h>
#include <linux/perf_event.h>
+#include <linux/utsname.h>
#include <asm/stacktrace.h>
#include <asm/uaccess.h>
#endif
#ifndef CONFIG_HIGH_RES_TIMERS
-#error gator requires the kernel to have CONFIG_HIGH_RES_TIMERS defined
+#error gator requires the kernel to have CONFIG_HIGH_RES_TIMERS defined to support PC sampling
#endif
#if defined(__arm__) && defined(CONFIG_SMP) && !defined(CONFIG_LOCAL_TIMERS)
#endif
#endif
-#if (!(GATOR_CPU_FREQ_SUPPORT))
-#warning gator requires kernel version 2.6.38 or greater and CONFIG_CPU_FREQ defined in order to enable the CPU Freq timeline chart
-#endif
-
/******************************************************************************
* DEFINES
******************************************************************************/
-#define TIMER_BUFFER_SIZE_DEFAULT (512*1024)
-#define EVENT_BUFFER_SIZE_DEFAULT (128*1024)
+#define SUMMARY_BUFFER_SIZE (1*1024)
+#define BACKTRACE_BUFFER_SIZE (128*1024)
+#define NAME_BUFFER_SIZE (64*1024)
+#define COUNTER_BUFFER_SIZE (64*1024) // counters have the core as part of the data and the core value in the frame header may be discarded
+#define BLOCK_COUNTER_BUFFER_SIZE (128*1024)
+#define ANNOTATE_BUFFER_SIZE (64*1024) // annotate counters have the core as part of the data and the core value in the frame header may be discarded
+#define SCHED_TRACE_BUFFER_SIZE (128*1024)
+#define GPU_TRACE_BUFFER_SIZE (64*1024) // gpu trace counters have the core as part of the data and the core value in the frame header may be discarded
+#define IDLE_BUFFER_SIZE (32*1024) // idle counters have the core as part of the data and the core value in the frame header may be discarded
+
+#define NO_COOKIE 0U
+#define INVALID_COOKIE ~0U
+
+#define FRAME_SUMMARY 1
+#define FRAME_BACKTRACE 2
+#define FRAME_NAME 3
+#define FRAME_COUNTER 4
+#define FRAME_BLOCK_COUNTER 5
+#define FRAME_ANNOTATE 6
+#define FRAME_SCHED_TRACE 7
+#define FRAME_GPU_TRACE 8
+#define FRAME_IDLE 9
+
+#define MESSAGE_END_BACKTRACE 1
+
+#define MESSAGE_COOKIE 1
+#define MESSAGE_THREAD_NAME 2
+#define HRTIMER_CORE_NAME 3
+
+#define MESSAGE_GPU_START 1
+#define MESSAGE_GPU_STOP 2
-#define NO_COOKIE 0UL
-#define INVALID_COOKIE ~0UL
+#define MESSAGE_SCHED_SWITCH 1
+#define MESSAGE_SCHED_EXIT 2
-#define FRAME_HRTIMER 1
-#define FRAME_EVENT 2
-#define FRAME_ANNOTATE 3
+#define MESSAGE_IDLE_ENTER 1
+#define MESSAGE_IDLE_EXIT 2
-#define MESSAGE_COOKIE 1
-#define MESSAGE_COUNTERS 3
-#define MESSAGE_START_BACKTRACE 5
-#define MESSAGE_END_BACKTRACE 7
-#define MESSAGE_SCHEDULER_TRACE 9
-#define MESSAGE_PID_NAME 11
-#define MESSAGE_GPU_TRACE 13
-#define MESSAGE_OVERFLOW 127
+#define MAXSIZE_PACK32 5
+#define MAXSIZE_PACK64 10
-#define MAXSIZE_PACK32 5
-#define MAXSIZE_PACK64 9
+#define FRAME_HEADER_SIZE 3
#if defined(__arm__)
#define PC_REG regs->ARM_pc
+#elif defined(__aarch64__)
+#define PC_REG regs->pc
#else
#define PC_REG regs->ip
#endif
-enum {TIMER_BUF, EVENT_BUF, NUM_GATOR_BUFS};
+enum {
+ SUMMARY_BUF,
+ BACKTRACE_BUF,
+ NAME_BUF,
+ COUNTER_BUF,
+ BLOCK_COUNTER_BUF,
+ ANNOTATE_BUF,
+ SCHED_TRACE_BUF,
+ GPU_TRACE_BUF,
+ IDLE_BUF,
+ NUM_GATOR_BUFS
+};
/******************************************************************************
* Globals
******************************************************************************/
static unsigned long gator_cpu_cores;
+// Size of the largest buffer. Effectively constant, set in gator_op_create_files
static unsigned long userspace_buffer_size;
static unsigned long gator_backtrace_depth;
+// How often to commit the buffers for live in nanoseconds
+static u64 gator_live_rate;
static unsigned long gator_started;
+static u64 gator_monotonic_started;
static unsigned long gator_buffer_opened;
static unsigned long gator_timer_count;
-static unsigned long gator_streaming;
+static unsigned long gator_response_type;
static DEFINE_MUTEX(start_mutex);
static DEFINE_MUTEX(gator_buffer_mutex);
bool event_based_sampling;
static DECLARE_WAIT_QUEUE_HEAD(gator_buffer_wait);
+static DECLARE_WAIT_QUEUE_HEAD(gator_annotate_wait);
+static struct timer_list gator_buffer_wake_up_timer;
+static LIST_HEAD(gator_events);
+
+static DEFINE_PER_CPU(u64, last_timestamp);
+
+static bool printed_monotonic_warning;
-static void buffer_check(int cpu, int buftype);
+static bool sent_core_name[NR_CPUS];
/******************************************************************************
* Prototypes
******************************************************************************/
+static void buffer_check(int cpu, int buftype, u64 time);
+static void gator_commit_buffer(int cpu, int buftype, u64 time);
+static int buffer_bytes_available(int cpu, int buftype);
static bool buffer_check_space(int cpu, int buftype, int bytes);
+static int contiguous_space_available(int cpu, int bufytpe);
static void gator_buffer_write_packed_int(int cpu, int buftype, unsigned int x);
static void gator_buffer_write_packed_int64(int cpu, int buftype, unsigned long long x);
-static void gator_buffer_write_string(int cpu, int buftype, char *x);
-static int gator_write_packed_int(char *buffer, unsigned int x);
-static int gator_write_packed_int64(char *buffer, unsigned long long x);
-static void gator_add_trace(int cpu, int buftype, unsigned int address);
-static void gator_add_sample(int cpu, int buftype, struct pt_regs * const regs);
-static uint64_t gator_get_time(void);
+static void gator_buffer_write_bytes(int cpu, int buftype, const char *x, int len);
+static void gator_buffer_write_string(int cpu, int buftype, const char *x);
+static void gator_add_trace(int cpu, unsigned long address);
+static void gator_add_sample(int cpu, struct pt_regs *const regs);
+static u64 gator_get_time(void);
+// Size of the buffer, must be a power of 2. Effectively constant, set in gator_op_setup.
static uint32_t gator_buffer_size[NUM_GATOR_BUFS];
+// gator_buffer_size - 1, bitwise and with pos to get offset into the array. Effectively constant, set in gator_op_setup.
static uint32_t gator_buffer_mask[NUM_GATOR_BUFS];
+// Read position in the buffer. Initialized to zero in gator_op_setup and incremented after bytes are read by userspace in userspace_buffer_read
static DEFINE_PER_CPU(int[NUM_GATOR_BUFS], gator_buffer_read);
+// Write position in the buffer. Initialized to zero in gator_op_setup and incremented after bytes are written to the buffer
static DEFINE_PER_CPU(int[NUM_GATOR_BUFS], gator_buffer_write);
+// Commit position in the buffer. Initialized to zero in gator_op_setup and incremented after a frame is ready to be read by userspace
static DEFINE_PER_CPU(int[NUM_GATOR_BUFS], gator_buffer_commit);
+// If set to false, decreases the number of bytes returned by buffer_bytes_available. Set in buffer_check_space if no space is remaining. Initialized to true in gator_op_setup
+// This means that if we run out of space, continue to report that no space is available until bytes are read by userspace
static DEFINE_PER_CPU(int[NUM_GATOR_BUFS], buffer_space_available);
+// The buffer. Allocated in gator_op_setup
static DEFINE_PER_CPU(char *[NUM_GATOR_BUFS], gator_buffer);
-static DEFINE_PER_CPU(uint64_t, emit_overflow);
+
+#if GATOR_LIVE
+// The time after which the buffer should be committed for live display
+static DEFINE_PER_CPU(u64, gator_buffer_commit_time);
+#endif
/******************************************************************************
* Application Includes
******************************************************************************/
+#include "gator_marshaling.c"
#include "gator_hrtimer_perf.c"
#include "gator_hrtimer_gator.c"
#include "gator_cookies.c"
#include "gator_trace_sched.c"
+#include "gator_trace_power.c"
#include "gator_trace_gpu.c"
#include "gator_backtrace.c"
#include "gator_annotate.c"
#include "gator_fs.c"
-#include "gator_ebs.c"
#include "gator_pack.c"
/******************************************************************************
* Misc
******************************************************************************/
-#if defined(__arm__)
+
+const struct gator_cpu gator_cpus[] = {
+ {
+ .cpuid = ARM1136,
+ .core_name = "ARM1136",
+ .pmnc_name = "ARM_ARM11",
+ .pmnc_counters = 3,
+ },
+ {
+ .cpuid = ARM1156,
+ .core_name = "ARM1156",
+ .pmnc_name = "ARM_ARM11",
+ .pmnc_counters = 3,
+ },
+ {
+ .cpuid = ARM1176,
+ .core_name = "ARM1176",
+ .pmnc_name = "ARM_ARM11",
+ .pmnc_counters = 3,
+ },
+ {
+ .cpuid = ARM11MPCORE,
+ .core_name = "ARM11MPCore",
+ .pmnc_name = "ARM_ARM11MPCore",
+ .pmnc_counters = 3,
+ },
+ {
+ .cpuid = CORTEX_A5,
+ .core_name = "Cortex-A5",
+ .pmu_name = "ARMv7_Cortex_A5",
+ .pmnc_name = "ARM_Cortex-A5",
+ .pmnc_counters = 2,
+ },
+ {
+ .cpuid = CORTEX_A7,
+ .core_name = "Cortex-A7",
+ .pmu_name = "ARMv7_Cortex_A7",
+ .pmnc_name = "ARM_Cortex-A7",
+ .pmnc_counters = 4,
+ },
+ {
+ .cpuid = CORTEX_A8,
+ .core_name = "Cortex-A8",
+ .pmu_name = "ARMv7_Cortex_A8",
+ .pmnc_name = "ARM_Cortex-A8",
+ .pmnc_counters = 4,
+ },
+ {
+ .cpuid = CORTEX_A9,
+ .core_name = "Cortex-A9",
+ .pmu_name = "ARMv7_Cortex_A9",
+ .pmnc_name = "ARM_Cortex-A9",
+ .pmnc_counters = 6,
+ },
+ {
+ .cpuid = CORTEX_A15,
+ .core_name = "Cortex-A15",
+ .pmu_name = "ARMv7_Cortex_A15",
+ .pmnc_name = "ARM_Cortex-A15",
+ .pmnc_counters = 6,
+ },
+ {
+ .cpuid = SCORPION,
+ .core_name = "Scorpion",
+ .pmnc_name = "Scorpion",
+ .pmnc_counters = 4,
+ },
+ {
+ .cpuid = SCORPIONMP,
+ .core_name = "ScorpionMP",
+ .pmnc_name = "ScorpionMP",
+ .pmnc_counters = 4,
+ },
+ {
+ .cpuid = KRAITSIM,
+ .core_name = "KraitSIM",
+ .pmnc_name = "Krait",
+ .pmnc_counters = 4,
+ },
+ {
+ .cpuid = KRAIT,
+ .core_name = "Krait",
+ .pmnc_name = "Krait",
+ .pmnc_counters = 4,
+ },
+ {
+ .cpuid = KRAIT_S4_PRO,
+ .core_name = "Krait S4 Pro",
+ .pmnc_name = "Krait",
+ .pmnc_counters = 4,
+ },
+ {
+ .cpuid = CORTEX_A53,
+ .core_name = "Cortex-A53",
+ .pmnc_name = "ARM_Cortex-A53",
+ .pmnc_counters = 6,
+ },
+ {
+ .cpuid = CORTEX_A57,
+ .core_name = "Cortex-A57",
+ .pmnc_name = "ARM_Cortex-A57",
+ .pmnc_counters = 6,
+ },
+ {
+ .cpuid = AARCH64,
+ .core_name = "AArch64",
+ .pmnc_name = "ARM_AArch64",
+ .pmnc_counters = 6,
+ },
+ {
+ .cpuid = OTHER,
+ .core_name = "Other",
+ .pmnc_name = "Other",
+ .pmnc_counters = 6,
+ },
+ {}
+};
+
+const struct gator_cpu *gator_find_cpu_by_cpuid(const u32 cpuid)
+{
+ int i;
+
+ for (i = 0; gator_cpus[i].cpuid != 0; ++i) {
+ const struct gator_cpu *const gator_cpu = &gator_cpus[i];
+ if (gator_cpu->cpuid == cpuid) {
+ return gator_cpu;
+ }
+ }
+
+ return NULL;
+}
+
+const struct gator_cpu *gator_find_cpu_by_pmu_name(const char *const name)
+{
+ int i;
+
+ for (i = 0; gator_cpus[i].cpuid != 0; ++i) {
+ const struct gator_cpu *const gator_cpu = &gator_cpus[i];
+ if (gator_cpu->pmu_name != NULL && strcmp(gator_cpu->pmu_name, name) == 0) {
+ return gator_cpu;
+ }
+ }
+
+ return NULL;
+}
+
u32 gator_cpuid(void)
{
+#if defined(__arm__) || defined(__aarch64__)
u32 val;
+#if !defined(__aarch64__)
asm volatile("mrc p15, 0, %0, c0, c0, 0" : "=r" (val));
+#else
+ asm volatile("mrs %0, midr_el1" : "=r" (val));
+#endif
return (val >> 4) & 0xfff;
-}
+#else
+ return OTHER;
#endif
+}
+
+static void gator_buffer_wake_up(unsigned long data)
+{
+ wake_up(&gator_buffer_wait);
+}
/******************************************************************************
* Commit interface
******************************************************************************/
-static bool buffer_commit_ready(int* cpu, int* buftype)
+static bool buffer_commit_ready(int *cpu, int *buftype)
{
int cpu_x, x;
for_each_present_cpu(cpu_x) {
/******************************************************************************
* Buffer management
******************************************************************************/
-static bool buffer_check_space(int cpu, int buftype, int bytes)
+static int buffer_bytes_available(int cpu, int buftype)
{
int remaining, filled;
-
+
filled = per_cpu(gator_buffer_write, cpu)[buftype] - per_cpu(gator_buffer_read, cpu)[buftype];
if (filled < 0) {
filled += gator_buffer_size[buftype];
remaining -= 2000;
}
+ return remaining;
+}
+
+static int contiguous_space_available(int cpu, int buftype)
+{
+ int remaining = buffer_bytes_available(cpu, buftype);
+ int contiguous = gator_buffer_size[buftype] - per_cpu(gator_buffer_write, cpu)[buftype];
+ if (remaining < contiguous)
+ return remaining;
+ else
+ return contiguous;
+}
+
+static bool buffer_check_space(int cpu, int buftype, int bytes)
+{
+ int remaining = buffer_bytes_available(cpu, buftype);
+
if (remaining < bytes) {
- if (per_cpu(buffer_space_available, cpu)[buftype] == true) {
- // overflow packet to be emitted at a later time, as we may be in the middle of writing a message, e.g. counters
- per_cpu(emit_overflow, cpu) = gator_get_time();
- pr_err("overflow: remaining = %d\n", gator_buffer_size[buftype] - filled);
- }
per_cpu(buffer_space_available, cpu)[buftype] = false;
} else {
per_cpu(buffer_space_available, cpu)[buftype] = true;
return per_cpu(buffer_space_available, cpu)[buftype];
}
-static void gator_buffer_write_bytes(int cpu, int buftype, char *x, int len)
+static void gator_buffer_write_bytes(int cpu, int buftype, const char *x, int len)
{
int i;
u32 write = per_cpu(gator_buffer_write, cpu)[buftype];
u32 mask = gator_buffer_mask[buftype];
- char* buffer = per_cpu(gator_buffer, cpu)[buftype];
+ char *buffer = per_cpu(gator_buffer, cpu)[buftype];
for (i = 0; i < len; i++) {
buffer[write] = x[i];
@@ -227,351 +455,332 @@ static void gator_buffer_write_bytes(int cpu, int buftype, char *x, int len)
per_cpu(gator_buffer_write, cpu)[buftype] = write;
}
-static void gator_buffer_write_string(int cpu, int buftype, char *x)
+static void gator_buffer_write_string(int cpu, int buftype, const char *x)
{
int len = strlen(x);
gator_buffer_write_packed_int(cpu, buftype, len);
gator_buffer_write_bytes(cpu, buftype, x, len);
}
-static void gator_buffer_header(int cpu, int buftype)
+static void gator_commit_buffer(int cpu, int buftype, u64 time)
{
- int frame;
+ int type_length, commit, length, byte;
- if (buftype == TIMER_BUF)
- frame = FRAME_HRTIMER;
- else if (buftype == EVENT_BUF)
- frame = FRAME_EVENT;
- else
- frame = -1;
+ if (!per_cpu(gator_buffer, cpu)[buftype])
+ return;
- gator_buffer_write_packed_int(cpu, buftype, frame);
- gator_buffer_write_packed_int(cpu, buftype, cpu);
-}
+ // post-populate the length, which does not include the response type length nor the length itself, i.e. only the length of the payload
+ type_length = gator_response_type ? 1 : 0;
+ commit = per_cpu(gator_buffer_commit, cpu)[buftype];
+ length = per_cpu(gator_buffer_write, cpu)[buftype] - commit;
+ if (length < 0) {
+ length += gator_buffer_size[buftype];
+ }
+ length = length - type_length - sizeof(int);
+
+ if (length <= FRAME_HEADER_SIZE) {
+ // Nothing to write, only the frame header is present
+ return;
+ }
+
+ for (byte = 0; byte < sizeof(int); byte++) {
+ per_cpu(gator_buffer, cpu)[buftype][(commit + type_length + byte) & gator_buffer_mask[buftype]] = (length >> byte * 8) & 0xFF;
+ }
-static void gator_commit_buffer(int cpu, int buftype)
-{
per_cpu(gator_buffer_commit, cpu)[buftype] = per_cpu(gator_buffer_write, cpu)[buftype];
- gator_buffer_header(cpu, buftype);
- wake_up(&gator_buffer_wait);
+
+#if GATOR_LIVE
+ if (gator_live_rate > 0) {
+ while (time > per_cpu(gator_buffer_commit_time, cpu)) {
+ per_cpu(gator_buffer_commit_time, cpu) += gator_live_rate;
+ }
+ }
+#endif
+
+ marshal_frame(cpu, buftype);
+
+ // had to delay scheduling work as attempting to schedule work during the context switch is illegal in kernel versions 3.5 and greater
+ mod_timer(&gator_buffer_wake_up_timer, jiffies + 1);
}
-static void buffer_check(int cpu, int buftype)
+static void buffer_check(int cpu, int buftype, u64 time)
{
int filled = per_cpu(gator_buffer_write, cpu)[buftype] - per_cpu(gator_buffer_commit, cpu)[buftype];
if (filled < 0) {
filled += gator_buffer_size[buftype];
}
if (filled >= ((gator_buffer_size[buftype] * 3) / 4)) {
- gator_commit_buffer(cpu, buftype);
+ gator_commit_buffer(cpu, buftype, time);
}
}
-static void gator_add_trace(int cpu, int buftype, unsigned int address)
+static void gator_add_trace(int cpu, unsigned long address)
{
off_t offset = 0;
- unsigned long cookie = get_address_cookie(cpu, buftype, current, address & ~1, &offset);
+ unsigned long cookie = get_address_cookie(cpu, current, address & ~1, &offset);
if (cookie == NO_COOKIE || cookie == INVALID_COOKIE) {
offset = address;
}
- gator_buffer_write_packed_int(cpu, buftype, offset & ~1);
- gator_buffer_write_packed_int(cpu, buftype, cookie);
+ marshal_backtrace(offset & ~1, cookie);
}
-static void gator_add_sample(int cpu, int buftype, struct pt_regs * const regs)
+static void gator_add_sample(int cpu, struct pt_regs *const regs)
{
- int inKernel = regs ? !user_mode(regs) : 1;
- unsigned long exec_cookie = inKernel ? NO_COOKIE : get_exec_cookie(cpu, buftype, current);
+ bool inKernel;
+ unsigned long exec_cookie;
if (!regs)
return;
- gator_buffer_write_packed_int(cpu, buftype, MESSAGE_START_BACKTRACE);
- gator_buffer_write_packed_int64(cpu, buftype, gator_get_time());
- gator_buffer_write_packed_int(cpu, buftype, exec_cookie);
- gator_buffer_write_packed_int(cpu, buftype, (unsigned int)current->tgid);
- gator_buffer_write_packed_int(cpu, buftype, (unsigned int)current->pid);
- gator_buffer_write_packed_int(cpu, buftype, inKernel);
+ inKernel = !user_mode(regs);
+ exec_cookie = get_exec_cookie(cpu, current);
+
+ if (!marshal_backtrace_header(exec_cookie, current->tgid, current->pid, inKernel))
+ return;
if (inKernel) {
- kernel_backtrace(cpu, buftype, regs);
+ kernel_backtrace(cpu, regs);
} else {
// Cookie+PC
- gator_add_trace(cpu, buftype, PC_REG);
+ gator_add_trace(cpu, PC_REG);
// Backtrace
if (gator_backtrace_depth)
- arm_backtrace_eabi(cpu, buftype, regs, gator_backtrace_depth);
+ arm_backtrace_eabi(cpu, regs, gator_backtrace_depth);
}
- gator_buffer_write_packed_int(cpu, buftype, MESSAGE_END_BACKTRACE);
+ marshal_backtrace_footer();
}
/******************************************************************************
* hrtimer interrupt processing
******************************************************************************/
-static LIST_HEAD(gator_events);
-
static void gator_timer_interrupt(void)
{
- struct pt_regs * const regs = get_irq_regs();
- int cpu = smp_processor_id();
- int *buffer, len, i, buftype = TIMER_BUF;
- long long *buffer64;
- struct gator_interface *gi;
-
- // Output scheduler trace
- len = gator_trace_sched_read(&buffer64);
- if (len > 0 && buffer_check_space(cpu, buftype, len * MAXSIZE_PACK64 + 2 * MAXSIZE_PACK32)) {
- gator_buffer_write_packed_int(cpu, buftype, MESSAGE_SCHEDULER_TRACE);
- gator_buffer_write_packed_int(cpu, buftype, len);
- for (i = 0; i < len; i++) {
- gator_buffer_write_packed_int64(cpu, buftype, buffer64[i]);
- }
- }
-
- // Output GPU trace
- len = gator_trace_gpu_read(&buffer64);
- if (len > 0 && buffer_check_space(cpu, buftype, len * MAXSIZE_PACK64 + 2 * MAXSIZE_PACK32)) {
- gator_buffer_write_packed_int(cpu, buftype, MESSAGE_GPU_TRACE);
- gator_buffer_write_packed_int(cpu, buftype, len);
- for (i = 0; i < len; i++) {
- gator_buffer_write_packed_int64(cpu, buftype, buffer64[i]);
- }
- }
+ struct pt_regs *const regs = get_irq_regs();
+ gator_backtrace_handler(regs);
+}
- // Output counters
- if (buffer_check_space(cpu, buftype, MAXSIZE_PACK32 * 2 + MAXSIZE_PACK64)) {
- gator_buffer_write_packed_int(cpu, buftype, MESSAGE_COUNTERS);
- gator_buffer_write_packed_int64(cpu, buftype, gator_get_time());
- list_for_each_entry(gi, &gator_events, list) {
- if (gi->read) {
- len = gi->read(&buffer);
- if (len > 0 && buffer_check_space(cpu, buftype, len * MAXSIZE_PACK32 + MAXSIZE_PACK32)) {
- gator_buffer_write_packed_int(cpu, buftype, len);
- for (i = 0; i < len; i++) {
- gator_buffer_write_packed_int(cpu, buftype, buffer[i]);
- }
- }
- } else if (gi->read64) {
- len = gi->read64(&buffer64);
- if (len > 0 && buffer_check_space(cpu, buftype, len * MAXSIZE_PACK64 + MAXSIZE_PACK32)) {
- gator_buffer_write_packed_int(cpu, buftype, len);
- for (i = 0; i < len; i++) {
- gator_buffer_write_packed_int64(cpu, buftype, buffer64[i]);
- }
- }
- }
- }
- gator_buffer_write_packed_int(cpu, buftype, 0);
- }
+void gator_backtrace_handler(struct pt_regs *const regs)
+{
+ int cpu = get_physical_cpu();
// Output backtrace
- if (!event_based_sampling && buffer_check_space(cpu, buftype, gator_backtrace_depth * 2 * MAXSIZE_PACK32))
- gator_add_sample(cpu, buftype, regs);
-
- // Overflow message
- if (per_cpu(emit_overflow, cpu)) {
- gator_buffer_write_packed_int(cpu, buftype, MESSAGE_OVERFLOW);
- gator_buffer_write_packed_int64(cpu, buftype, per_cpu(emit_overflow, cpu));
- per_cpu(emit_overflow, cpu) = 0;
- }
+ gator_add_sample(cpu, regs);
- // Check and commit; generally, commit is set to occur once per second
- buffer_check(cpu, buftype);
+ // Collect counters
+ if (!per_cpu(collecting, cpu)) {
+ collect_counters();
+ }
}
-DEFINE_PER_CPU(int, hrtimer_is_active);
-static int hrtimer_running;
+static int gator_running;
// This function runs in interrupt context and on the appropriate core
-static void gator_timer_offline(void* unused)
+static void gator_timer_offline(void *migrate)
{
- int i, len, cpu = smp_processor_id();
- int* buffer;
- long long* buffer64;
-
- if (per_cpu(hrtimer_is_active, cpu)) {
- struct gator_interface *gi;
- gator_hrtimer_offline(cpu);
- per_cpu(hrtimer_is_active, cpu) = 0;
-
- // Output scheduler trace
- len = gator_trace_sched_offline(&buffer64);
- if (len > 0 && buffer_check_space(cpu, TIMER_BUF, len * MAXSIZE_PACK64 + 2 * MAXSIZE_PACK32)) {
- gator_buffer_write_packed_int(cpu, TIMER_BUF, MESSAGE_SCHEDULER_TRACE);
- gator_buffer_write_packed_int(cpu, TIMER_BUF, len);
- for (i = 0; i < len; i++) {
- gator_buffer_write_packed_int64(cpu, TIMER_BUF, buffer64[i]);
- }
- }
+ struct gator_interface *gi;
+ int i, len, cpu = get_physical_cpu();
+ int *buffer;
+ u64 time;
- // Output GPU trace
- len = gator_trace_gpu_offline(&buffer64);
- if (len > 0 && buffer_check_space(cpu, TIMER_BUF, len * MAXSIZE_PACK64 + 2 * MAXSIZE_PACK32)) {
- gator_buffer_write_packed_int(cpu, TIMER_BUF, MESSAGE_GPU_TRACE);
- gator_buffer_write_packed_int(cpu, TIMER_BUF, len);
- for (i = 0; i < len; i++) {
- gator_buffer_write_packed_int64(cpu, TIMER_BUF, buffer64[i]);
- }
- }
+ gator_trace_sched_offline();
+ gator_trace_power_offline();
- // offline any events and output counters
- gator_buffer_write_packed_int(cpu, TIMER_BUF, MESSAGE_COUNTERS);
- gator_buffer_write_packed_int64(cpu, TIMER_BUF, gator_get_time());
+ if (!migrate) {
+ gator_hrtimer_offline();
+ }
+
+ // Offline any events and output counters
+ time = gator_get_time();
+ if (marshal_event_header()) {
list_for_each_entry(gi, &gator_events, list) {
if (gi->offline) {
- len = gi->offline(&buffer);
- if (len > 0 && buffer_check_space(cpu, TIMER_BUF, len * MAXSIZE_PACK32 + MAXSIZE_PACK32)) {
- gator_buffer_write_packed_int(cpu, TIMER_BUF, len);
- for (i = 0; i < len; i++)
- gator_buffer_write_packed_int(cpu, TIMER_BUF, buffer[i]);
- }
+ len = gi->offline(&buffer, migrate);
+ marshal_event(len, buffer);
}
}
- gator_buffer_write_packed_int(cpu, TIMER_BUF, 0);
-
- gator_commit_buffer(cpu, TIMER_BUF);
+ // Only check after writing all counters so that time and corresponding counters appear in the same frame
+ buffer_check(cpu, BLOCK_COUNTER_BUF, time);
}
- if (event_based_sampling) {
- gator_commit_buffer(cpu, EVENT_BUF);
- }
+ // Flush all buffers on this core
+ for (i = 0; i < NUM_GATOR_BUFS; i++)
+ gator_commit_buffer(cpu, i, time);
}
// This function runs in interrupt context and may be running on a core other than core 'cpu'
-static void gator_timer_offline_dispatch(int cpu)
+static void gator_timer_offline_dispatch(int cpu, bool migrate)
{
struct gator_interface *gi;
- list_for_each_entry(gi, &gator_events, list)
- if (gi->offline_dispatch)
- gi->offline_dispatch(cpu);
-
- gator_event_sampling_offline_dispatch(cpu);
+ list_for_each_entry(gi, &gator_events, list) {
+ if (gi->offline_dispatch) {
+ gi->offline_dispatch(cpu, migrate);
+ }
+ }
}
static void gator_timer_stop(void)
{
int cpu;
- if (hrtimer_running) {
+ if (gator_running) {
on_each_cpu(gator_timer_offline, NULL, 1);
for_each_online_cpu(cpu) {
- gator_timer_offline_dispatch(cpu);
+ gator_timer_offline_dispatch(lcpu_to_pcpu(cpu), false);
}
- hrtimer_running = 0;
+ gator_running = 0;
gator_hrtimer_shutdown();
}
}
// This function runs in interrupt context and on the appropriate core
-static void gator_timer_online(void* unused)
+static void gator_timer_online(void *migrate)
{
- int i, len, cpu = smp_processor_id();
- int* buffer;
+ struct gator_interface *gi;
+ int len, cpu = get_physical_cpu();
+ int *buffer;
- if (!per_cpu(hrtimer_is_active, cpu)) {
- struct gator_interface *gi;
+ gator_trace_power_online();
- // online any events and output counters
- gator_buffer_write_packed_int(cpu, TIMER_BUF, MESSAGE_COUNTERS);
- gator_buffer_write_packed_int64(cpu, TIMER_BUF, gator_get_time());
+ // online any events and output counters
+ if (marshal_event_header()) {
list_for_each_entry(gi, &gator_events, list) {
if (gi->online) {
- len = gi->online(&buffer);
- if (len > 0 && buffer_check_space(cpu, TIMER_BUF, len * MAXSIZE_PACK32 + MAXSIZE_PACK32)) {
- gator_buffer_write_packed_int(cpu, TIMER_BUF, len);
- for (i = 0; i < len; i++)
- gator_buffer_write_packed_int(cpu, TIMER_BUF, buffer[i]);
- }
+ len = gi->online(&buffer, migrate);
+ marshal_event(len, buffer);
}
}
- gator_buffer_write_packed_int(cpu, TIMER_BUF, 0);
+ // Only check after writing all counters so that time and corresponding counters appear in the same frame
+ buffer_check(cpu, BLOCK_COUNTER_BUF, gator_get_time());
+ }
- gator_event_sampling_online();
+ if (!migrate) {
+ gator_hrtimer_online();
+ }
- gator_hrtimer_online(cpu);
- per_cpu(hrtimer_is_active, cpu) = 1;
+#if defined(__arm__) || defined(__aarch64__)
+ if (!sent_core_name[cpu]) {
+ const char *core_name = NULL;
+ const u32 cpuid = gator_cpuid();
+ const struct gator_cpu *const gator_cpu = gator_find_cpu_by_cpuid(cpuid);
+ char core_name_buf[32];
+
+ if (gator_cpu != NULL) {
+ core_name = gator_cpu->core_name;
+ } else {
+ snprintf(core_name_buf, sizeof(core_name_buf), "Unknown (0x%.3x)", cpuid);
+ core_name = core_name_buf;
+ }
+
+ marshal_core_name(cpuid, core_name);
+ sent_core_name[cpu] = true;
}
+#endif
}
// This function runs in interrupt context and may be running on a core other than core 'cpu'
-static void gator_timer_online_dispatch(int cpu)
+static void gator_timer_online_dispatch(int cpu, bool migrate)
{
struct gator_interface *gi;
- list_for_each_entry(gi, &gator_events, list)
- if (gi->online_dispatch)
- gi->online_dispatch(cpu);
-
- gator_event_sampling_online_dispatch(cpu);
+ list_for_each_entry(gi, &gator_events, list) {
+ if (gi->online_dispatch) {
+ gi->online_dispatch(cpu, migrate);
+ }
+ }
}
-int gator_timer_start(unsigned long setup)
+int gator_timer_start(unsigned long sample_rate)
{
int cpu;
- if (!setup) {
- pr_err("gator: cannot start due to a system tick value of zero\n");
- return -1;
- } else if (hrtimer_running) {
- pr_notice("gator: high res timer already running\n");
+ if (gator_running) {
+ pr_notice("gator: already running\n");
return 0;
}
- hrtimer_running = 1;
+ gator_running = 1;
+
+ // event based sampling trumps hr timer based sampling
+ if (event_based_sampling) {
+ sample_rate = 0;
+ }
- if (gator_hrtimer_init(setup, gator_timer_interrupt) == -1)
+ if (gator_hrtimer_init(sample_rate, gator_timer_interrupt) == -1)
return -1;
for_each_online_cpu(cpu) {
- gator_timer_online_dispatch(cpu);
+ gator_timer_online_dispatch(lcpu_to_pcpu(cpu), false);
}
on_each_cpu(gator_timer_online, NULL, 1);
return 0;
}
-static uint64_t gator_get_time(void)
+static u64 gator_get_time(void)
{
struct timespec ts;
- uint64_t timestamp;
+ u64 timestamp;
+ u64 prev_timestamp;
+ u64 delta;
+ int cpu = smp_processor_id();
- getnstimeofday(&ts);
+ // Match clock_gettime(CLOCK_MONOTONIC_RAW, &ts) from userspace
+ getrawmonotonic(&ts);
timestamp = timespec_to_ns(&ts);
- return timestamp;
+ // getrawmonotonic is not monotonic on all systems. Detect and attempt to correct these cases.
+ // up to 0.5ms delta has been seen on some systems, which can skew Streamline data when viewing at high resolution.
+ prev_timestamp = per_cpu(last_timestamp, cpu);
+ if (prev_timestamp <= timestamp) {
+ per_cpu(last_timestamp, cpu) = timestamp;
+ } else {
+ delta = prev_timestamp - timestamp;
+ // Log the error once
+ if (!printed_monotonic_warning && delta > 500000) {
+ printk(KERN_ERR "%s: getrawmonotonic is not monotonic cpu: %i delta: %lli\nSkew in Streamline data may be present at the fine zoom levels\n", __FUNCTION__, cpu, delta);
+ printed_monotonic_warning = true;
+ } else {
+ pr_debug("%s: getrawmonotonic is not monotonic cpu: %i delta: %lli\n", __FUNCTION__, cpu, delta);
+ }
+ timestamp = prev_timestamp;
+ }
+
+ return timestamp - gator_monotonic_started;
}
/******************************************************************************
* cpu hotplug and pm notifiers
******************************************************************************/
-static int __cpuinit gator_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu)
+#include "gator_iks.c"
+
+static int __cpuinit gator_hotcpu_notify(struct notifier_block *self, unsigned long action, void *hcpu)
{
- long cpu = (long)hcpu;
+ int cpu = lcpu_to_pcpu((long)hcpu);
switch (action) {
- case CPU_DOWN_PREPARE:
- case CPU_DOWN_PREPARE_FROZEN:
- smp_call_function_single(cpu, gator_timer_offline, NULL, 1);
- gator_timer_offline_dispatch(cpu);
- break;
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- gator_timer_online_dispatch(cpu);
- smp_call_function_single(cpu, gator_timer_online, NULL, 1);
- break;
+ case CPU_DOWN_PREPARE:
+ case CPU_DOWN_PREPARE_FROZEN:
+ smp_call_function_single(cpu, gator_timer_offline, NULL, 1);
+ gator_timer_offline_dispatch(cpu, false);
+ break;
+ case CPU_ONLINE:
+ case CPU_ONLINE_FROZEN:
+ gator_timer_online_dispatch(cpu, false);
+ smp_call_function_single(cpu, gator_timer_online, NULL, 1);
+ break;
}
return NOTIFY_OK;
}
-static struct notifier_block __refdata gator_cpu_notifier = {
- .notifier_call = gator_cpu_notify,
+static struct notifier_block __refdata gator_hotcpu_notifier = {
+ .notifier_call = gator_hotcpu_notify,
};
// n.b. calling "on_each_cpu" only runs on those that are online
@@ -581,24 +790,24 @@ static int gator_pm_notify(struct notifier_block *nb, unsigned long event, void
int cpu;
switch (event) {
- case PM_HIBERNATION_PREPARE:
- case PM_SUSPEND_PREPARE:
- unregister_hotcpu_notifier(&gator_cpu_notifier);
- unregister_scheduler_tracepoints();
- on_each_cpu(gator_timer_offline, NULL, 1);
- for_each_online_cpu(cpu) {
- gator_timer_offline_dispatch(cpu);
- }
- break;
- case PM_POST_HIBERNATION:
- case PM_POST_SUSPEND:
- for_each_online_cpu(cpu) {
- gator_timer_online_dispatch(cpu);
- }
- on_each_cpu(gator_timer_online, NULL, 1);
- register_scheduler_tracepoints();
- register_hotcpu_notifier(&gator_cpu_notifier);
- break;
+ case PM_HIBERNATION_PREPARE:
+ case PM_SUSPEND_PREPARE:
+ unregister_hotcpu_notifier(&gator_hotcpu_notifier);
+ unregister_scheduler_tracepoints();
+ on_each_cpu(gator_timer_offline, NULL, 1);
+ for_each_online_cpu(cpu) {
+ gator_timer_offline_dispatch(lcpu_to_pcpu(cpu), false);
+ }
+ break;
+ case PM_POST_HIBERNATION:
+ case PM_POST_SUSPEND:
+ for_each_online_cpu(cpu) {
+ gator_timer_online_dispatch(lcpu_to_pcpu(cpu), false);
+ }
+ on_each_cpu(gator_timer_online, NULL, 1);
+ register_scheduler_tracepoints();
+ register_hotcpu_notifier(&gator_hotcpu_notifier);
+ break;
}
return NOTIFY_OK;
static int gator_notifier_start(void)
{
int retval;
- retval = register_hotcpu_notifier(&gator_cpu_notifier);
+ retval = register_hotcpu_notifier(&gator_hotcpu_notifier);
if (retval == 0)
retval = register_pm_notifier(&gator_pm_notifier);
return retval;
static void gator_notifier_stop(void)
{
unregister_pm_notifier(&gator_pm_notifier);
- unregister_hotcpu_notifier(&gator_cpu_notifier);
+ unregister_hotcpu_notifier(&gator_hotcpu_notifier);
}
/******************************************************************************
* Main
******************************************************************************/
+static void gator_summary(void)
+{
+ u64 timestamp, uptime;
+ struct timespec ts;
+ char uname_buf[512];
+ void (*m2b)(struct timespec *ts);
+ unsigned long flags;
+
+ snprintf(uname_buf, sizeof(uname_buf), "%s %s %s %s %s GNU/Linux", utsname()->sysname, utsname()->nodename, utsname()->release, utsname()->version, utsname()->machine);
+
+ getnstimeofday(&ts);
+ timestamp = timespec_to_ns(&ts);
+
+ do_posix_clock_monotonic_gettime(&ts);
+ // monotonic_to_bootbased is not defined for some versions of Android
+ m2b = symbol_get(monotonic_to_bootbased);
+ if (m2b) {
+ m2b(&ts);
+ }
+ uptime = timespec_to_ns(&ts);
+
+ // Disable interrupts as gator_get_time calls smp_processor_id to verify time is monotonic
+ local_irq_save(flags);
+ // Set monotonic_started to zero as gator_get_time is uptime minus monotonic_started
+ gator_monotonic_started = 0;
+ gator_monotonic_started = gator_get_time();
+ local_irq_restore(flags);
+
+ marshal_summary(timestamp, uptime, uname_buf);
+}
+
int gator_events_install(struct gator_interface *interface)
{
list_add_tail(&interface->list, &gator_events);
int gator_events_get_key(void)
{
- static int key;
+ // key of zero is reserved as a timestamp
+ static int key = 1;
- return key++;
+ const int ret = key;
+ key += 2;
+ return ret;
}
static int gator_init(void)
{
int i;
- if (gator_annotate_init())
- return -1;
+ calc_first_cluster_size();
// events sources (gator_events.h, generated by gator_events.sh)
for (i = 0; i < ARRAY_SIZE(gator_events_list); i++)
if (gator_events_list[i])
gator_events_list[i]();
+ gator_trace_power_init();
+
return 0;
}
+static void gator_exit(void)
+{
+ struct gator_interface *gi;
+
+ list_for_each_entry(gi, &gator_events, list)
+ if (gi->shutdown)
+ gi->shutdown();
+}
+
static int gator_start(void)
{
+ unsigned long cpu, i;
struct gator_interface *gi;
+ if (gator_migrate_start())
+ goto migrate_failure;
+
+ // Initialize the buffer with the frame type and core
+ for_each_present_cpu(cpu) {
+ for (i = 0; i < NUM_GATOR_BUFS; i++) {
+ marshal_frame(cpu, i);
+ }
+ per_cpu(last_timestamp, cpu) = 0;
+ }
+ printed_monotonic_warning = false;
+
+ // Capture the start time
+ gator_summary();
+
// start all events
list_for_each_entry(gi, &gator_events, list) {
if (gi->start && gi->start() != 0) {
goto annotate_failure;
if (gator_trace_sched_start())
goto sched_failure;
+ if (gator_trace_power_start())
+ goto power_failure;
if (gator_trace_gpu_start())
goto gpu_failure;
- if (gator_event_sampling_start())
- goto event_sampling_failure;
if (gator_timer_start(gator_timer_count))
goto timer_failure;
if (gator_notifier_start())
notifier_failure:
gator_timer_stop();
timer_failure:
- gator_event_sampling_stop();
-event_sampling_failure:
gator_trace_gpu_stop();
gpu_failure:
+ gator_trace_power_stop();
+power_failure:
gator_trace_sched_stop();
sched_failure:
gator_annotate_stop();
if (gi->stop)
gi->stop();
events_failure:
+ gator_migrate_stop();
+migrate_failure:
return -1;
}
{
struct gator_interface *gi;
- // stop all events
- list_for_each_entry(gi, &gator_events, list)
- if (gi->stop)
- gi->stop();
-
gator_annotate_stop();
gator_trace_sched_stop();
+ gator_trace_power_stop();
gator_trace_gpu_stop();
- gator_event_sampling_stop();
// stop all interrupt callback reads before tearing down other interfaces
- gator_notifier_stop(); // should be called before gator_timer_stop to avoid re-enabling the hrtimer after it has been offlined
+ gator_notifier_stop(); // should be called before gator_timer_stop to avoid re-enabling the hrtimer after it has been offlined
gator_timer_stop();
-}
-static void gator_exit(void)
-{
- gator_annotate_exit();
+ // stop all events
+ list_for_each_entry(gi, &gator_events, list)
+ if (gi->stop)
+ gi->stop();
+
+ gator_migrate_stop();
}
/******************************************************************************
mutex_lock(&start_mutex);
- gator_buffer_size[TIMER_BUF] = userspace_buffer_size;
- gator_buffer_mask[TIMER_BUF] = userspace_buffer_size - 1;
+ gator_buffer_size[SUMMARY_BUF] = SUMMARY_BUFFER_SIZE;
+ gator_buffer_mask[SUMMARY_BUF] = SUMMARY_BUFFER_SIZE - 1;
- // must be a power of 2
- if (gator_buffer_size[TIMER_BUF] & (gator_buffer_size[TIMER_BUF] - 1)) {
- err = -ENOEXEC;
- goto setup_error;
- }
+ gator_buffer_size[BACKTRACE_BUF] = BACKTRACE_BUFFER_SIZE;
+ gator_buffer_mask[BACKTRACE_BUF] = BACKTRACE_BUFFER_SIZE - 1;
+
+ gator_buffer_size[NAME_BUF] = NAME_BUFFER_SIZE;
+ gator_buffer_mask[NAME_BUF] = NAME_BUFFER_SIZE - 1;
+
+ gator_buffer_size[COUNTER_BUF] = COUNTER_BUFFER_SIZE;
+ gator_buffer_mask[COUNTER_BUF] = COUNTER_BUFFER_SIZE - 1;
- gator_buffer_size[EVENT_BUF] = EVENT_BUFFER_SIZE_DEFAULT;
- gator_buffer_mask[EVENT_BUF] = gator_buffer_size[EVENT_BUF] - 1;
+ gator_buffer_size[BLOCK_COUNTER_BUF] = BLOCK_COUNTER_BUFFER_SIZE;
+ gator_buffer_mask[BLOCK_COUNTER_BUF] = BLOCK_COUNTER_BUFFER_SIZE - 1;
+
+ gator_buffer_size[ANNOTATE_BUF] = ANNOTATE_BUFFER_SIZE;
+ gator_buffer_mask[ANNOTATE_BUF] = ANNOTATE_BUFFER_SIZE - 1;
+
+ gator_buffer_size[SCHED_TRACE_BUF] = SCHED_TRACE_BUFFER_SIZE;
+ gator_buffer_mask[SCHED_TRACE_BUF] = SCHED_TRACE_BUFFER_SIZE - 1;
+
+ gator_buffer_size[GPU_TRACE_BUF] = GPU_TRACE_BUFFER_SIZE;
+ gator_buffer_mask[GPU_TRACE_BUF] = GPU_TRACE_BUFFER_SIZE - 1;
+
+ gator_buffer_size[IDLE_BUF] = IDLE_BUFFER_SIZE;
+ gator_buffer_mask[IDLE_BUF] = IDLE_BUFFER_SIZE - 1;
// Initialize percpu per buffer variables
for (i = 0; i < NUM_GATOR_BUFS; i++) {
+ // Verify buffers are a power of 2
+ if (gator_buffer_size[i] & (gator_buffer_size[i] - 1)) {
+ err = -ENOEXEC;
+ goto setup_error;
+ }
+
for_each_present_cpu(cpu) {
+ per_cpu(gator_buffer_read, cpu)[i] = 0;
+ per_cpu(gator_buffer_write, cpu)[i] = 0;
+ per_cpu(gator_buffer_commit, cpu)[i] = 0;
+ per_cpu(buffer_space_available, cpu)[i] = true;
+#if GATOR_LIVE
+ per_cpu(gator_buffer_commit_time, cpu) = gator_live_rate;
+#endif
+
+ // Annotation is a special case that only uses a single buffer
+ if (cpu > 0 && i == ANNOTATE_BUF) {
+ per_cpu(gator_buffer, cpu)[i] = NULL;
+ continue;
+ }
+
per_cpu(gator_buffer, cpu)[i] = vmalloc(gator_buffer_size[i]);
if (!per_cpu(gator_buffer, cpu)[i]) {
err = -ENOMEM;
goto setup_error;
}
-
- per_cpu(gator_buffer_read, cpu)[i] = 0;
- per_cpu(gator_buffer_write, cpu)[i] = 0;
- per_cpu(gator_buffer_commit, cpu)[i] = 0;
- per_cpu(buffer_space_available, cpu)[i] = true;
- per_cpu(emit_overflow, cpu) = 0;
- gator_buffer_header(cpu, i);
}
}
mutex_lock(&gator_buffer_mutex);
gator_started = 0;
+ gator_monotonic_started = 0;
cookies_release();
wake_up(&gator_buffer_wait);
mutex_lock(&start_mutex);
- gator_annotate_shutdown();
-
for_each_present_cpu(cpu) {
mutex_lock(&gator_buffer_mutex);
for (i = 0; i < NUM_GATOR_BUFS; i++) {
per_cpu(gator_buffer_write, cpu)[i] = 0;
per_cpu(gator_buffer_commit, cpu)[i] = 0;
per_cpu(buffer_space_available, cpu)[i] = true;
- per_cpu(emit_overflow, cpu) = 0;
+#if GATOR_LIVE
+ per_cpu(gator_buffer_commit_time, cpu) = 0;
+#endif
}
mutex_unlock(&gator_buffer_mutex);
}
+ memset(&sent_core_name, 0, sizeof(sent_core_name));
+
mutex_unlock(&start_mutex);
}
@@ -892,8 +1191,8 @@ static ssize_t enable_write(struct file *file, char const __user *buf, size_t co
}
static const struct file_operations enable_fops = {
- .read = enable_read,
- .write = enable_write,
+ .read = enable_read,
+ .write = enable_write,
};
static int userspace_buffer_open(struct inode *inode, struct file *file)
}
static ssize_t userspace_buffer_read(struct file *file, char __user *buf,
- size_t count, loff_t *offset)
+ size_t count, loff_t *offset)
{
int retval = -EINVAL;
int commit = 0, length1, length2, read;
// sleep until the condition is true or a signal is received
// the condition is checked each time gator_buffer_wait is woken up
buftype = cpu = -1;
- wait_event_interruptible(gator_buffer_wait, buffer_commit_ready(&cpu, &buftype) || gator_annotate_ready() || !gator_started);
+ wait_event_interruptible(gator_buffer_wait, buffer_commit_ready(&cpu, &buftype) || !gator_started);
if (signal_pending(current))
return -EINTR;
mutex_lock(&gator_buffer_mutex);
- if (buftype != -1 && cpu != -1) {
- read = per_cpu(gator_buffer_read, cpu)[buftype];
- commit = per_cpu(gator_buffer_commit, cpu)[buftype];
+ if (buftype == -1 || cpu == -1) {
+ retval = 0;
+ goto out;
+ }
- /* May happen if the buffer is freed during pending reads. */
- if (!per_cpu(gator_buffer, cpu)[buftype]) {
- retval = -EFAULT;
- goto out;
- }
+ read = per_cpu(gator_buffer_read, cpu)[buftype];
+ commit = per_cpu(gator_buffer_commit, cpu)[buftype];
- /* determine the size of two halves */
- length1 = commit - read;
- buffer1 = &(per_cpu(gator_buffer, cpu)[buftype][read]);
- buffer2 = &(per_cpu(gator_buffer, cpu)[buftype][0]);
- if (length1 < 0) {
- length1 = gator_buffer_size[buftype] - read;
- length2 = commit;
- }
- } else if (gator_annotate_ready()) {
- length1 = gator_annotate_read(&buffer1);
- if (!length1)
- goto out;
- } else {
- retval = 0;
+ /* May happen if the buffer is freed during pending reads. */
+ if (!per_cpu(gator_buffer, cpu)[buftype]) {
+ retval = -EFAULT;
goto out;
}
+ /* determine the size of two halves */
+ length1 = commit - read;
+ buffer1 = &(per_cpu(gator_buffer, cpu)[buftype][read]);
+ buffer2 = &(per_cpu(gator_buffer, cpu)[buftype][0]);
+ if (length1 < 0) {
+ length1 = gator_buffer_size[buftype] - read;
+ length2 = commit;
+ }
+
/* start, middle or end */
if (length1 > 0) {
if (copy_to_user(&buf[0], buffer1, length1)) {
}
}
- if (buftype != -1 && cpu != -1)
- per_cpu(gator_buffer_read, cpu)[buftype] = commit;
-
+ per_cpu(gator_buffer_read, cpu)[buftype] = commit;
retval = length1 + length2;
/* kick just in case we've lost an SMP event */
wake_up(&gator_buffer_wait);
+ // Wake up annotate_write if more space is available
+ if (buftype == ANNOTATE_BUF) {
+ wake_up(&gator_annotate_wait);
+ }
+
out:
mutex_unlock(&gator_buffer_mutex);
return retval;
}
const struct file_operations gator_event_buffer_fops = {
- .open = userspace_buffer_open,
- .release = userspace_buffer_release,
- .read = userspace_buffer_read,
+ .open = userspace_buffer_open,
+ .release = userspace_buffer_release,
+ .read = userspace_buffer_read,
};
static ssize_t depth_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
{
- return gatorfs_ulong_to_user(gator_backtrace_depth, buf, count,
- offset);
+ return gatorfs_ulong_to_user(gator_backtrace_depth, buf, count, offset);
}
static ssize_t depth_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
@@ -1040,8 +1337,8 @@ static ssize_t depth_write(struct file *file, char const __user *buf, size_t cou
}
static const struct file_operations depth_fops = {
- .read = depth_read,
- .write = depth_write
+ .read = depth_read,
+ .write = depth_write
};
void gator_op_create_files(struct super_block *sb, struct dentry *root)
for_each_present_cpu(cpu) {
gator_cpu_cores++;
}
- userspace_buffer_size = TIMER_BUFFER_SIZE_DEFAULT;
- gator_streaming = 1;
+ userspace_buffer_size = BACKTRACE_BUFFER_SIZE;
+ gator_response_type = 1;
+ gator_live_rate = 0;
gatorfs_create_file(sb, root, "enable", &enable_fops);
gatorfs_create_file(sb, root, "buffer", &gator_event_buffer_fops);
gatorfs_create_file(sb, root, "backtrace_depth", &depth_fops);
- gatorfs_create_ulong(sb, root, "cpu_cores", &gator_cpu_cores);
- gatorfs_create_ulong(sb, root, "buffer_size", &userspace_buffer_size);
+ gatorfs_create_ro_ulong(sb, root, "cpu_cores", &gator_cpu_cores);
+ gatorfs_create_ro_ulong(sb, root, "buffer_size", &userspace_buffer_size);
gatorfs_create_ulong(sb, root, "tick", &gator_timer_count);
- gatorfs_create_ulong(sb, root, "streaming", &gator_streaming);
+ gatorfs_create_ulong(sb, root, "response_type", &gator_response_type);
gatorfs_create_ro_ulong(sb, root, "version", &gator_protocol_version);
+ gatorfs_create_ro_u64(sb, root, "started", &gator_monotonic_started);
+ gatorfs_create_u64(sb, root, "live_rate", &gator_live_rate);
// Annotate interface
gator_annotate_create_files(sb, root);
list_for_each_entry(gi, &gator_events, list)
if (gi->create_files)
gi->create_files(sb, dir);
+
+ // Power interface
+ gator_trace_power_create_files(sb, dir);
}
/******************************************************************************
return -1;
}
+ setup_timer(&gator_buffer_wake_up_timer, gator_buffer_wake_up, 0);
+
return 0;
}
static void __exit gator_module_exit(void)
{
+ del_timer_sync(&gator_buffer_wake_up_timer);
tracepoint_synchronize_unregister();
- gatorfs_unregister();
gator_exit();
+ gatorfs_unregister();
}
module_init(gator_module_init);