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Retro68/gcc/liboffloadmic/runtime/offload_target.cpp
Wolfgang Thaller 0a883ac4aa upgrade gcc to 6.3.0, binutils to 2.28
2017-04-10 13:32:00 +02:00

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/*
Copyright (c) 2014-2015 Intel Corporation. All Rights Reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Intel Corporation nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "offload_target.h"
#include <stdlib.h>
#include <unistd.h>
#ifdef SEP_SUPPORT
#include <fcntl.h>
#include <sys/ioctl.h>
#endif // SEP_SUPPORT
#include <omp.h>
#include <map>
// typedef offload_func_with_parms.
// Pointer to function that represents an offloaded entry point.
// The parameters are a temporary fix for parameters on the stack.
typedef void (*offload_func_with_parms)(void *);
// Target console and file logging
const char *prefix;
int console_enabled = 0;
int offload_report_level = 0;
// Trace information
static const char* vardesc_direction_as_string[] = {
"NOCOPY",
"IN",
"OUT",
"INOUT"
};
static const char* vardesc_type_as_string[] = {
"unknown",
"data",
"data_ptr",
"func_ptr",
"void_ptr",
"string_ptr",
"dv",
"dv_data",
"dv_data_slice",
"dv_ptr",
"dv_ptr_data",
"dv_ptr_data_slice",
"cean_var",
"cean_var_ptr",
"c_data_ptr_array"
};
int mic_index = -1;
int mic_engines_total = -1;
uint64_t mic_frequency = 0;
int offload_number = 0;
static std::map<void*, RefInfo*> ref_data;
static mutex_t add_ref_lock;
#ifdef SEP_SUPPORT
static const char* sep_monitor_env = "SEP_MONITOR";
static bool sep_monitor = false;
static const char* sep_device_env = "SEP_DEVICE";
static const char* sep_device = "/dev/sep3.8/c";
static int sep_counter = 0;
#define SEP_API_IOC_MAGIC 99
#define SEP_IOCTL_PAUSE _IO (SEP_API_IOC_MAGIC, 31)
#define SEP_IOCTL_RESUME _IO (SEP_API_IOC_MAGIC, 32)
static void add_ref_count(void * buf, bool created)
{
mutex_locker_t locker(add_ref_lock);
RefInfo * info = ref_data[buf];
if (info) {
info->count++;
}
else {
info = new RefInfo((int)created,(long)1);
}
info->is_added |= created;
ref_data[buf] = info;
}
static void BufReleaseRef(void * buf)
{
mutex_locker_t locker(add_ref_lock);
RefInfo * info = ref_data[buf];
if (info) {
--info->count;
if (info->count == 0 && info->is_added) {
OFFLOAD_TRACE(1, "Calling COIBufferReleaseRef AddRef count = %d\n",
((RefInfo *) ref_data[buf])->count);
BufferReleaseRef(buf);
info->is_added = 0;
}
}
}
static int VTPauseSampling(void)
{
int ret = -1;
int handle = open(sep_device, O_RDWR);
if (handle > 0) {
ret = ioctl(handle, SEP_IOCTL_PAUSE);
close(handle);
}
return ret;
}
static int VTResumeSampling(void)
{
int ret = -1;
int handle = open(sep_device, O_RDWR);
if (handle > 0) {
ret = ioctl(handle, SEP_IOCTL_RESUME);
close(handle);
}
return ret;
}
#endif // SEP_SUPPORT
void OffloadDescriptor::offload(
uint32_t buffer_count,
void** buffers,
void* misc_data,
uint16_t misc_data_len,
void* return_data,
uint16_t return_data_len
)
{
FunctionDescriptor *func = (FunctionDescriptor*) misc_data;
const char *name = func->data;
OffloadDescriptor ofld;
char *in_data = 0;
char *out_data = 0;
char *timer_data = 0;
console_enabled = func->console_enabled;
timer_enabled = func->timer_enabled;
offload_report_level = func->offload_report_level;
offload_number = func->offload_number;
ofld.set_offload_number(func->offload_number);
#ifdef SEP_SUPPORT
if (sep_monitor) {
if (__sync_fetch_and_add(&sep_counter, 1) == 0) {
OFFLOAD_DEBUG_TRACE(2, "VTResumeSampling\n");
VTResumeSampling();
}
}
#endif // SEP_SUPPORT
OFFLOAD_DEBUG_TRACE_1(2, ofld.get_offload_number(),
c_offload_start_target_func,
"Offload \"%s\" started\n", name);
// initialize timer data
OFFLOAD_TIMER_INIT();
OFFLOAD_TIMER_START(c_offload_target_total_time);
OFFLOAD_TIMER_START(c_offload_target_descriptor_setup);
// get input/output buffer addresses
if (func->in_datalen > 0 || func->out_datalen > 0) {
if (func->data_offset != 0) {
in_data = (char*) misc_data + func->data_offset;
out_data = (char*) return_data;
}
else {
char *inout_buf = (char*) buffers[--buffer_count];
in_data = inout_buf;
out_data = inout_buf;
}
}
// assign variable descriptors
ofld.m_vars_total = func->vars_num;
if (ofld.m_vars_total > 0) {
uint64_t var_data_len = ofld.m_vars_total * sizeof(VarDesc);
ofld.m_vars = (VarDesc*) malloc(var_data_len);
if (ofld.m_vars == NULL)
LIBOFFLOAD_ERROR(c_malloc);
memcpy(ofld.m_vars, in_data, var_data_len);
in_data += var_data_len;
func->in_datalen -= var_data_len;
}
// timer data
if (func->timer_enabled) {
uint64_t timer_data_len = OFFLOAD_TIMER_DATALEN();
timer_data = out_data;
out_data += timer_data_len;
func->out_datalen -= timer_data_len;
}
// init Marshallers
ofld.m_in.init_buffer(in_data, func->in_datalen);
ofld.m_out.init_buffer(out_data, func->out_datalen);
// copy buffers to offload descriptor
std::copy(buffers, buffers + buffer_count,
std::back_inserter(ofld.m_buffers));
OFFLOAD_TIMER_STOP(c_offload_target_descriptor_setup);
// find offload entry address
OFFLOAD_TIMER_START(c_offload_target_func_lookup);
offload_func_with_parms entry = (offload_func_with_parms)
__offload_entries.find_addr(name);
if (entry == NULL) {
#if OFFLOAD_DEBUG > 0
if (console_enabled > 2) {
__offload_entries.dump();
}
#endif
LIBOFFLOAD_ERROR(c_offload_descriptor_offload, name);
exit(1);
}
OFFLOAD_TIMER_STOP(c_offload_target_func_lookup);
OFFLOAD_TIMER_START(c_offload_target_func_time);
// execute offload entry
entry(&ofld);
OFFLOAD_TIMER_STOP(c_offload_target_func_time);
OFFLOAD_TIMER_STOP(c_offload_target_total_time);
// copy timer data to the buffer
OFFLOAD_TIMER_TARGET_DATA(timer_data);
OFFLOAD_DEBUG_TRACE(2, "Offload \"%s\" finished\n", name);
#ifdef SEP_SUPPORT
if (sep_monitor) {
if (__sync_sub_and_fetch(&sep_counter, 1) == 0) {
OFFLOAD_DEBUG_TRACE(2, "VTPauseSampling\n");
VTPauseSampling();
}
}
#endif // SEP_SUPPORT
}
void OffloadDescriptor::merge_var_descs(
VarDesc *vars,
VarDesc2 *vars2,
int vars_total
)
{
// number of variable descriptors received from host and generated
// locally should match
if (m_vars_total < vars_total) {
LIBOFFLOAD_ERROR(c_merge_var_descs1);
exit(1);
}
for (int i = 0; i < m_vars_total; i++) {
if (i < vars_total) {
// variable type must match
if (m_vars[i].type.bits != vars[i].type.bits) {
LIBOFFLOAD_ERROR(c_merge_var_descs2);
exit(1);
}
m_vars[i].ptr = vars[i].ptr;
m_vars[i].into = vars[i].into;
const char *var_sname = "";
if (vars2 != NULL) {
if (vars2[i].sname != NULL) {
var_sname = vars2[i].sname;
}
}
OFFLOAD_DEBUG_TRACE_1(2, get_offload_number(), c_offload_var,
" VarDesc %d, var=%s, %s, %s\n",
i, var_sname,
vardesc_direction_as_string[m_vars[i].direction.bits],
vardesc_type_as_string[m_vars[i].type.src]);
if (vars2 != NULL && vars2[i].dname != NULL) {
OFFLOAD_TRACE(2, " into=%s, %s\n", vars2[i].dname,
vardesc_type_as_string[m_vars[i].type.dst]);
}
}
OFFLOAD_TRACE(2,
" type_src=%d, type_dstn=%d, direction=%d, "
"alloc_if=%d, free_if=%d, align=%d, mic_offset=%d, flags=0x%x, "
"offset=%lld, size=%lld, count/disp=%lld, ptr=%p into=%p\n",
m_vars[i].type.src,
m_vars[i].type.dst,
m_vars[i].direction.bits,
m_vars[i].alloc_if,
m_vars[i].free_if,
m_vars[i].align,
m_vars[i].mic_offset,
m_vars[i].flags.bits,
m_vars[i].offset,
m_vars[i].size,
m_vars[i].count,
m_vars[i].ptr,
m_vars[i].into);
}
}
void OffloadDescriptor::scatter_copyin_data()
{
OFFLOAD_TIMER_START(c_offload_target_scatter_inputs);
OFFLOAD_DEBUG_TRACE(2, "IN buffer @ %p size %lld\n",
m_in.get_buffer_start(),
m_in.get_buffer_size());
OFFLOAD_DEBUG_DUMP_BYTES(2, m_in.get_buffer_start(),
m_in.get_buffer_size());
// receive data
for (int i = 0; i < m_vars_total; i++) {
bool src_is_for_mic = (m_vars[i].direction.out ||
m_vars[i].into == NULL);
void** ptr_addr = src_is_for_mic ?
static_cast<void**>(m_vars[i].ptr) :
static_cast<void**>(m_vars[i].into);
int type = src_is_for_mic ? m_vars[i].type.src :
m_vars[i].type.dst;
bool is_static = src_is_for_mic ?
m_vars[i].flags.is_static :
m_vars[i].flags.is_static_dstn;
void *ptr = NULL;
if (m_vars[i].flags.alloc_disp) {
int64_t offset = 0;
m_in.receive_data(&offset, sizeof(offset));
}
if (VAR_TYPE_IS_DV_DATA_SLICE(type) ||
VAR_TYPE_IS_DV_DATA(type)) {
ArrDesc *dvp = (type == c_dv_data_slice || type == c_dv_data)?
reinterpret_cast<ArrDesc*>(ptr_addr) :
*reinterpret_cast<ArrDesc**>(ptr_addr);
ptr_addr = reinterpret_cast<void**>(&dvp->Base);
}
// Set pointer values
switch (type) {
case c_data_ptr_array:
{
int j = m_vars[i].ptr_arr_offset;
int max_el = j + m_vars[i].count;
char *dst_arr_ptr = (src_is_for_mic)?
*(reinterpret_cast<char**>(m_vars[i].ptr)) :
reinterpret_cast<char*>(m_vars[i].into);
if (m_vars[i].flags.is_pointer) {
dst_arr_ptr = *((char**)dst_arr_ptr);
}
for (; j < max_el; j++) {
if (src_is_for_mic) {
m_vars[j].ptr =
dst_arr_ptr + m_vars[j].ptr_arr_offset;
}
else {
m_vars[j].into =
dst_arr_ptr + m_vars[j].ptr_arr_offset;
}
}
}
break;
case c_data:
case c_void_ptr:
case c_cean_var:
case c_dv:
break;
case c_string_ptr:
case c_data_ptr:
case c_cean_var_ptr:
case c_dv_ptr:
if (m_vars[i].alloc_if && !m_vars[i].flags.preallocated) {
void *buf = NULL;
if (m_vars[i].flags.sink_addr) {
m_in.receive_data(&buf, sizeof(buf));
}
else {
buf = m_buffers.front();
m_buffers.pop_front();
}
if (buf) {
if (!is_static) {
if (!m_vars[i].flags.sink_addr) {
// increment buffer reference
OFFLOAD_TIMER_START(c_offload_target_add_buffer_refs);
BufferAddRef(buf);
OFFLOAD_TRACE(1, "Calling COIBufferAddRef %p\n", buf);
OFFLOAD_TIMER_STOP(c_offload_target_add_buffer_refs);
}
add_ref_count(buf, 0 == m_vars[i].flags.sink_addr);
OFFLOAD_TRACE(1, " AddRef count = %d\n",
((RefInfo *) ref_data[buf])->count);
}
ptr = static_cast<char*>(buf) +
m_vars[i].mic_offset +
(m_vars[i].flags.is_stack_buf ?
0 : m_vars[i].offset);
}
*ptr_addr = ptr;
}
else if (m_vars[i].flags.sink_addr) {
void *buf;
m_in.receive_data(&buf, sizeof(buf));
void *ptr = static_cast<char*>(buf) +
m_vars[i].mic_offset +
(m_vars[i].flags.is_stack_buf ?
0 : m_vars[i].offset);
*ptr_addr = ptr;
}
break;
case c_func_ptr:
break;
case c_dv_data:
case c_dv_ptr_data:
case c_dv_data_slice:
case c_dv_ptr_data_slice:
if (m_vars[i].alloc_if) {
void *buf;
if (m_vars[i].flags.sink_addr) {
m_in.receive_data(&buf, sizeof(buf));
}
else {
buf = m_buffers.front();
m_buffers.pop_front();
}
if (buf) {
if (!is_static) {
if (!m_vars[i].flags.sink_addr) {
// increment buffer reference
OFFLOAD_TIMER_START(c_offload_target_add_buffer_refs);
BufferAddRef(buf);
OFFLOAD_TIMER_STOP(c_offload_target_add_buffer_refs);
}
add_ref_count(buf, 0 == m_vars[i].flags.sink_addr);
}
ptr = static_cast<char*>(buf) +
m_vars[i].mic_offset + m_vars[i].offset;
}
*ptr_addr = ptr;
}
else if (m_vars[i].flags.sink_addr) {
void *buf;
m_in.receive_data(&buf, sizeof(buf));
ptr = static_cast<char*>(buf) +
m_vars[i].mic_offset + m_vars[i].offset;
*ptr_addr = ptr;
}
break;
default:
LIBOFFLOAD_ERROR(c_unknown_var_type, type);
abort();
}
// Release obsolete buffers for stack of persistent objects
if (type = c_data_ptr &&
m_vars[i].flags.is_stack_buf &&
!m_vars[i].direction.bits &&
m_vars[i].alloc_if &&
m_vars[i].size != 0) {
for (int j=0; j < m_vars[i].size; j++) {
void *buf;
m_in.receive_data(&buf, sizeof(buf));
BufferReleaseRef(buf);
ref_data.erase(buf);
}
}
// Do copyin
switch (m_vars[i].type.dst) {
case c_data_ptr_array:
break;
case c_data:
case c_void_ptr:
case c_cean_var:
if (m_vars[i].direction.in &&
!m_vars[i].flags.is_static_dstn) {
int64_t size;
int64_t disp;
char* ptr = m_vars[i].into ?
static_cast<char*>(m_vars[i].into) :
static_cast<char*>(m_vars[i].ptr);
if (m_vars[i].type.dst == c_cean_var) {
m_in.receive_data((&size), sizeof(int64_t));
m_in.receive_data((&disp), sizeof(int64_t));
}
else {
size = m_vars[i].size;
disp = 0;
}
m_in.receive_data(ptr + disp, size);
}
break;
case c_dv:
if (m_vars[i].direction.bits ||
m_vars[i].alloc_if ||
m_vars[i].free_if) {
char* ptr = m_vars[i].into ?
static_cast<char*>(m_vars[i].into) :
static_cast<char*>(m_vars[i].ptr);
m_in.receive_data(ptr + sizeof(uint64_t),
m_vars[i].size - sizeof(uint64_t));
}
break;
case c_string_ptr:
case c_data_ptr:
case c_cean_var_ptr:
case c_dv_ptr:
case c_dv_data:
case c_dv_ptr_data:
case c_dv_data_slice:
case c_dv_ptr_data_slice:
break;
case c_func_ptr:
if (m_vars[i].direction.in) {
m_in.receive_func_ptr((const void**) m_vars[i].ptr);
}
break;
default:
LIBOFFLOAD_ERROR(c_unknown_var_type, m_vars[i].type.dst);
abort();
}
}
OFFLOAD_TRACE(1, "Total copyin data received from host: [%lld] bytes\n",
m_in.get_tfr_size());
OFFLOAD_TIMER_STOP(c_offload_target_scatter_inputs);
OFFLOAD_TIMER_START(c_offload_target_compute);
}
void OffloadDescriptor::gather_copyout_data()
{
OFFLOAD_TIMER_STOP(c_offload_target_compute);
OFFLOAD_TIMER_START(c_offload_target_gather_outputs);
for (int i = 0; i < m_vars_total; i++) {
bool src_is_for_mic = (m_vars[i].direction.out ||
m_vars[i].into == NULL);
switch (m_vars[i].type.src) {
case c_data_ptr_array:
break;
case c_data:
case c_void_ptr:
case c_cean_var:
if (m_vars[i].direction.out &&
!m_vars[i].flags.is_static) {
m_out.send_data(
static_cast<char*>(m_vars[i].ptr) + m_vars[i].disp,
m_vars[i].size);
}
break;
case c_dv:
break;
case c_string_ptr:
case c_data_ptr:
case c_cean_var_ptr:
case c_dv_ptr:
if (m_vars[i].free_if &&
src_is_for_mic &&
!m_vars[i].flags.preallocated &&
!m_vars[i].flags.is_static) {
void *buf = *static_cast<char**>(m_vars[i].ptr) -
m_vars[i].mic_offset -
(m_vars[i].flags.is_stack_buf?
0 : m_vars[i].offset);
if (buf == NULL) {
break;
}
// decrement buffer reference count
OFFLOAD_TIMER_START(c_offload_target_release_buffer_refs);
BufReleaseRef(buf);
OFFLOAD_TIMER_STOP(c_offload_target_release_buffer_refs);
}
if (m_vars[i].flags.preallocated && m_vars[i].alloc_if) {
m_out.send_data((void*) m_vars[i].ptr, sizeof(void*));
}
break;
case c_func_ptr:
if (m_vars[i].direction.out) {
m_out.send_func_ptr(*((void**) m_vars[i].ptr));
}
break;
case c_dv_data:
case c_dv_ptr_data:
case c_dv_data_slice:
case c_dv_ptr_data_slice:
if (src_is_for_mic &&
m_vars[i].free_if &&
!m_vars[i].flags.is_static) {
ArrDesc *dvp = (m_vars[i].type.src == c_dv_data ||
m_vars[i].type.src == c_dv_data_slice) ?
static_cast<ArrDesc*>(m_vars[i].ptr) :
*static_cast<ArrDesc**>(m_vars[i].ptr);
void *buf = reinterpret_cast<char*>(dvp->Base) -
m_vars[i].mic_offset -
m_vars[i].offset;
if (buf == NULL) {
break;
}
// decrement buffer reference count
OFFLOAD_TIMER_START(c_offload_target_release_buffer_refs);
BufReleaseRef(buf);
OFFLOAD_TIMER_STOP(c_offload_target_release_buffer_refs);
}
break;
default:
LIBOFFLOAD_ERROR(c_unknown_var_type, m_vars[i].type.dst);
abort();
}
if (m_vars[i].into) {
switch (m_vars[i].type.dst) {
case c_data_ptr_array:
break;
case c_data:
case c_void_ptr:
case c_cean_var:
case c_dv:
break;
case c_string_ptr:
case c_data_ptr:
case c_cean_var_ptr:
case c_dv_ptr:
if (m_vars[i].direction.in &&
m_vars[i].free_if &&
!m_vars[i].flags.is_static_dstn) {
void *buf = *static_cast<char**>(m_vars[i].into) -
m_vars[i].mic_offset -
(m_vars[i].flags.is_stack_buf?
0 : m_vars[i].offset);
if (buf == NULL) {
break;
}
// decrement buffer reference count
OFFLOAD_TIMER_START(
c_offload_target_release_buffer_refs);
BufReleaseRef(buf);
OFFLOAD_TIMER_STOP(
c_offload_target_release_buffer_refs);
}
break;
case c_func_ptr:
break;
case c_dv_data:
case c_dv_ptr_data:
case c_dv_data_slice:
case c_dv_ptr_data_slice:
if (m_vars[i].free_if &&
m_vars[i].direction.in &&
!m_vars[i].flags.is_static_dstn) {
ArrDesc *dvp =
(m_vars[i].type.dst == c_dv_data_slice ||
m_vars[i].type.dst == c_dv_data) ?
static_cast<ArrDesc*>(m_vars[i].into) :
*static_cast<ArrDesc**>(m_vars[i].into);
void *buf = reinterpret_cast<char*>(dvp->Base) -
m_vars[i].mic_offset -
m_vars[i].offset;
if (buf == NULL) {
break;
}
// decrement buffer reference count
OFFLOAD_TIMER_START(
c_offload_target_release_buffer_refs);
BufReleaseRef(buf);
OFFLOAD_TIMER_STOP(
c_offload_target_release_buffer_refs);
}
break;
default:
LIBOFFLOAD_ERROR(c_unknown_var_type, m_vars[i].type.dst);
abort();
}
}
}
OFFLOAD_DEBUG_TRACE(2, "OUT buffer @ p %p size %lld\n",
m_out.get_buffer_start(),
m_out.get_buffer_size());
OFFLOAD_DEBUG_DUMP_BYTES(2,
m_out.get_buffer_start(),
m_out.get_buffer_size());
OFFLOAD_DEBUG_TRACE_1(1, get_offload_number(), c_offload_copyout_data,
"Total copyout data sent to host: [%lld] bytes\n",
m_out.get_tfr_size());
OFFLOAD_TIMER_STOP(c_offload_target_gather_outputs);
}
void __offload_target_init(void)
{
#ifdef SEP_SUPPORT
const char* env_var = getenv(sep_monitor_env);
if (env_var != 0 && *env_var != '\0') {
sep_monitor = atoi(env_var);
}
env_var = getenv(sep_device_env);
if (env_var != 0 && *env_var != '\0') {
sep_device = env_var;
}
#endif // SEP_SUPPORT
prefix = report_get_message_str(c_report_mic);
// init frequency
mic_frequency = COIPerfGetCycleFrequency();
}
// User-visible offload API
int _Offload_number_of_devices(void)
{
return mic_engines_total;
}
int _Offload_get_device_number(void)
{
return mic_index;
}
int _Offload_get_physical_device_number(void)
{
uint32_t index;
EngineGetIndex(&index);
return index;
}
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