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topology-levelzero.c
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topology-levelzero.c
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/*
* Copyright © 2020-2023 Inria. All rights reserved.
* See COPYING in top-level directory.
*/
#include "private/autogen/config.h"
#include "hwloc.h"
#include "hwloc/plugins.h"
/* private headers allowed for convenience because this plugin is built within hwloc */
#include "private/misc.h"
#include "private/debug.h"
#include <level_zero/ze_api.h>
#include <level_zero/zes_api.h>
struct hwloc_osdev_array {
unsigned nr, nr_allocated;
hwloc_obj_t *objs;
};
static void
hwloc__levelzero_osdev_array_init(struct hwloc_osdev_array *array)
{
array->nr = 0;
array->nr_allocated = 0;
array->objs = NULL;
}
static int
hwloc__levelzero_osdev_array_add(struct hwloc_osdev_array *array,
hwloc_obj_t new)
{
if (array->nr_allocated == array->nr) {
unsigned new_nr_allocated = array->nr_allocated + 40; /* enough for 8 devices + 4 subdevices each on first allocation */
hwloc_obj_t *tmp = realloc(array->objs, new_nr_allocated * sizeof(*array->objs));
if (!tmp)
/* the object won't be added */
return -1;
array->nr_allocated = new_nr_allocated;
array->objs = tmp;
}
array->objs[array->nr++] = new;
return 0;
}
static void
hwloc__levelzero_osdev_array_free(struct hwloc_osdev_array *array)
{
free(array->objs);
}
static int
hwloc__levelzero_osdev_array_find(struct hwloc_osdev_array *array,
hwloc_obj_t osdev)
{
unsigned i;
for(i=0; i<array->nr; i++)
if (array->objs[i] == osdev)
return (int)i;
return -1;
}
static void
hwloc__levelzero_properties_get(ze_device_handle_t h, hwloc_obj_t osdev,
int sysman_maybe_missing,
int *is_integrated_p)
{
ze_result_t res;
ze_device_properties_t prop;
zes_device_properties_t prop2;
int is_subdevice = 0;
int is_integrated = 0;
memset(&prop, 0, sizeof(prop));
res = zeDeviceGetProperties(h, &prop);
if (res == ZE_RESULT_SUCCESS) {
/* name is the model name followed by the deviceID
* flags 1<<0 means integrated (vs discrete).
*/
char tmp[64];
char uuid[ZE_MAX_DEVICE_UUID_SIZE*2+1];
unsigned i;
const char *type;
switch (prop.type) {
case ZE_DEVICE_TYPE_GPU: type = "GPU"; break;
case ZE_DEVICE_TYPE_CPU: type = "CPU"; break;
case ZE_DEVICE_TYPE_FPGA: type = "FPGA"; break;
case ZE_DEVICE_TYPE_MCA: type = "MCA"; break;
case ZE_DEVICE_TYPE_VPU: type = "VPU"; break;
default:
if (HWLOC_SHOW_ALL_ERRORS())
fprintf(stderr, "hwloc/levelzero: unexpected device type %u\n", (unsigned) prop.type);
type = "Unknown";
}
hwloc_obj_add_info(osdev, "LevelZeroDeviceType", type);
snprintf(tmp, sizeof(tmp), "%u", prop.numSlices);
hwloc_obj_add_info(osdev, "LevelZeroNumSlices", tmp);
snprintf(tmp, sizeof(tmp), "%u", prop.numSubslicesPerSlice);
hwloc_obj_add_info(osdev, "LevelZeroNumSubslicesPerSlice", tmp);
snprintf(tmp, sizeof(tmp), "%u", prop.numEUsPerSubslice);
hwloc_obj_add_info(osdev, "LevelZeroNumEUsPerSubslice", tmp);
snprintf(tmp, sizeof(tmp), "%u", prop.numThreadsPerEU);
hwloc_obj_add_info(osdev, "LevelZeroNumThreadsPerEU", tmp);
for(i=0; i<ZE_MAX_DEVICE_UUID_SIZE; i++)
snprintf(uuid+2*i, 3, "%02x", prop.uuid.id[i]);
hwloc_obj_add_info(osdev, "LevelZeroUUID", uuid);
if (prop.flags & ZE_DEVICE_PROPERTY_FLAG_SUBDEVICE)
is_subdevice = 1;
if (prop.flags & ZE_DEVICE_PROPERTY_FLAG_INTEGRATED)
is_integrated = 1;
}
if (is_integrated_p)
*is_integrated_p = is_integrated;
if (is_subdevice)
/* sysman API on subdevice returns the same as root device, and we don't need those duplicate attributes */
return;
/* try to get additional info from sysman if enabled */
memset(&prop2, 0, sizeof(prop2));
res = zesDeviceGetProperties(h, &prop2);
if (res == ZE_RESULT_SUCCESS) {
/* old implementations may return "Unknown", recent may return "unknown" */
if (strcasecmp((const char *) prop2.vendorName, "Unknown"))
hwloc_obj_add_info(osdev, "LevelZeroVendor", (const char *) prop2.vendorName);
if (strcasecmp((const char *) prop2.modelName, "Unknown"))
hwloc_obj_add_info(osdev, "LevelZeroModel", (const char *) prop2.modelName);
if (strcasecmp((const char *) prop2.brandName, "Unknown"))
hwloc_obj_add_info(osdev, "LevelZeroBrand", (const char *) prop2.brandName);
if (strcasecmp((const char *) prop2.serialNumber, "Unknown"))
hwloc_obj_add_info(osdev, "LevelZeroSerialNumber", (const char *) prop2.serialNumber);
if (strcasecmp((const char *) prop2.boardNumber, "Unknown"))
hwloc_obj_add_info(osdev, "LevelZeroBoardNumber", (const char *) prop2.boardNumber);
} else {
static int warned = 0;
if (!warned) {
if (sysman_maybe_missing == 1 && HWLOC_SHOW_ALL_ERRORS())
fprintf(stderr, "hwloc/levelzero: zesDeviceGetProperties() failed (ZES_ENABLE_SYSMAN=1 set too late?).\n");
else if (sysman_maybe_missing == 2 && HWLOC_SHOW_ALL_ERRORS())
fprintf(stderr, "hwloc/levelzero: zesDeviceGetProperties() failed (ZES_ENABLE_SYSMAN=0).\n");
warned = 1;
}
/* continue in degraded mode, we'll miss locality and some attributes */
}
}
static void
hwloc__levelzero_cqprops_get(ze_device_handle_t h,
hwloc_obj_t osdev)
{
ze_command_queue_group_properties_t *cqprops;
unsigned nr_cqprops = 0;
ze_result_t res;
res = zeDeviceGetCommandQueueGroupProperties(h, &nr_cqprops, NULL);
if (res != ZE_RESULT_SUCCESS || !nr_cqprops)
return;
cqprops = malloc(nr_cqprops * sizeof(*cqprops));
if (cqprops) {
res = zeDeviceGetCommandQueueGroupProperties(h, &nr_cqprops, cqprops);
if (res == ZE_RESULT_SUCCESS) {
unsigned k;
char tmp[32];
snprintf(tmp, sizeof(tmp), "%u", nr_cqprops);
hwloc_obj_add_info(osdev, "LevelZeroCQGroups", tmp);
for(k=0; k<nr_cqprops; k++) {
char name[32];
snprintf(name, sizeof(name), "LevelZeroCQGroup%u", k);
snprintf(tmp, sizeof(tmp), "%u*0x%lx", (unsigned) cqprops[k].numQueues, (unsigned long) cqprops[k].flags);
hwloc_obj_add_info(osdev, name, tmp);
}
}
free(cqprops);
}
}
static int
hwloc__levelzero_memory_get_from_sysman(zes_device_handle_t h,
hwloc_obj_t root_osdev,
unsigned nr_osdevs, hwloc_obj_t *sub_osdevs)
{
zes_mem_handle_t *mh;
uint32_t nr_mems;
ze_result_t res;
unsigned long long totalHBMkB = 0;
unsigned long long totalDDRkB = 0;
nr_mems = 0;
res = zesDeviceEnumMemoryModules(h, &nr_mems, NULL);
if (res != ZE_RESULT_SUCCESS)
return -1; /* notify that sysman failed */
hwloc_debug("L0/Sysman: found %u memory modules in osdev %s\n",
nr_mems, root_osdev->name);
if (!nr_mems)
return 0;
mh = malloc(nr_mems * sizeof(*mh));
if (mh) {
res = zesDeviceEnumMemoryModules(h, &nr_mems, mh);
if (res == ZE_RESULT_SUCCESS) {
unsigned m;
for(m=0; m<nr_mems; m++) {
zes_mem_properties_t mprop;
res = zesMemoryGetProperties(mh[m], &mprop);
if (res == ZE_RESULT_SUCCESS) {
const char *type;
hwloc_obj_t osdev;
char name[ZE_MAX_DEVICE_NAME+64], value[64];
if (!mprop.physicalSize) {
/* unknown, but memory state should have it */
zes_mem_state_t s;
res = zesMemoryGetState(mh[m], &s);
if (res == ZE_RESULT_SUCCESS) {
hwloc_debug("L0/Sysman: found size 0 for memory modules #%u, using memory state size instead\n", m);
mprop.physicalSize = s.size;
}
}
if (mprop.onSubdevice) {
if (mprop.subdeviceId >= nr_osdevs || !nr_osdevs || !sub_osdevs) {
if (HWLOC_SHOW_ALL_ERRORS())
fprintf(stderr, "hwloc/levelzero: memory module #%u on unexpected subdeviceId #%u\n", m, mprop.subdeviceId);
osdev = NULL; /* we'll ignore it but we'll still agregate its subdevice memories into totalHBM/DDRkB */
} else {
osdev = sub_osdevs[mprop.subdeviceId];
}
} else {
osdev = root_osdev;
}
switch (mprop.type) {
case ZES_MEM_TYPE_HBM:
type = "HBM";
totalHBMkB += mprop.physicalSize >> 10;
break;
case ZES_MEM_TYPE_DDR:
case ZES_MEM_TYPE_DDR3:
case ZES_MEM_TYPE_DDR4:
case ZES_MEM_TYPE_DDR5:
case ZES_MEM_TYPE_LPDDR:
case ZES_MEM_TYPE_LPDDR3:
case ZES_MEM_TYPE_LPDDR4:
case ZES_MEM_TYPE_LPDDR5:
type = "DDR";
totalDDRkB += mprop.physicalSize >> 10;
break;
default:
type = "Memory";
}
hwloc_debug("L0/Sysman: found %llu bytes type %s for osdev %s (onsub %d subid %u)\n",
(unsigned long long) mprop.physicalSize, type, osdev ? osdev->name : "NULL",
mprop.onSubdevice, mprop.subdeviceId);
if (!osdev || !type || !mprop.physicalSize)
continue;
if (osdev != root_osdev) {
/* set the subdevice memory immediately */
snprintf(name, sizeof(name), "LevelZero%sSize", type);
snprintf(value, sizeof(value), "%llu", (unsigned long long) mprop.physicalSize >> 10);
hwloc_obj_add_info(osdev, name, value);
}
}
}
}
free(mh);
}
/* set the root device memory at the end, once subdevice memories were agregated */
if (totalHBMkB) {
char value[64];
snprintf(value, sizeof(value), "%llu", totalHBMkB);
hwloc_obj_add_info(root_osdev, "LevelZeroHBMSize", value);
}
if (totalDDRkB) {
char value[64];
snprintf(value, sizeof(value), "%llu", totalDDRkB);
hwloc_obj_add_info(root_osdev, "LevelZeroDDRSize", value);
}
return 0;
}
static void
hwloc__levelzero_memory_get_from_coreapi(ze_device_handle_t h,
hwloc_obj_t osdev,
int ignore_ddr)
{
ze_device_memory_properties_t *mh;
uint32_t nr_mems;
ze_result_t res;
nr_mems = 0;
res = zeDeviceGetMemoryProperties(h, &nr_mems, NULL);
if (res != ZE_RESULT_SUCCESS || !nr_mems)
return;
hwloc_debug("L0/CoreAPI: found %u memories in osdev %s\n",
nr_mems, osdev->name);
mh = malloc(nr_mems * sizeof(*mh));
if (mh) {
res = zeDeviceGetMemoryProperties(h, &nr_mems, mh);
if (res == ZE_RESULT_SUCCESS) {
unsigned m;
for(m=0; m<nr_mems; m++) {
const char *_name = mh[m].name;
char name[300], value[64];
/* FIXME: discrete GPUs report 95% of the physical memory (what sysman sees)
* while integrated GPUs report 80% of the host RAM (sysman sees 0), adjust?
*/
hwloc_debug("L0/CoreAPI: found memory name %s size %llu in osdev %s\n",
mh[m].name, (unsigned long long) mh[m].totalSize, osdev->name);
if (!mh[m].totalSize)
continue;
if (ignore_ddr && !strcmp(_name, "DDR"))
continue;
if (!_name[0])
_name = "Memory";
snprintf(name, sizeof(name), "LevelZero%sSize", _name); /* HBM or DDR, or Memory if unknown */
snprintf(value, sizeof(value), "%llu", (unsigned long long) mh[m].totalSize >> 10);
hwloc_obj_add_info(osdev, name, value);
}
}
free(mh);
}
}
static void
hwloc__levelzero_memory_get(zes_device_handle_t h, hwloc_obj_t root_osdev, int is_integrated,
unsigned nr_subdevices, zes_device_handle_t *subh, hwloc_obj_t *sub_osdevs)
{
static int memory_from_coreapi = -1; /* 1 means coreapi, 0 means sysman, -1 means sysman if available or coreapi otherwise */
static int first = 1;
if (first) {
char *env;
env = getenv("HWLOC_L0_COREAPI_MEMORY");
if (env)
memory_from_coreapi = atoi(env);
if (memory_from_coreapi == -1) {
int ret = hwloc__levelzero_memory_get_from_sysman(h, root_osdev, nr_subdevices, sub_osdevs);
if (!ret) {
/* sysman worked, we're done, disable coreapi for next time */
hwloc_debug("levelzero: sysman/memory succeeded, disabling coreapi memory queries\n");
memory_from_coreapi = 0;
return;
}
/* sysman failed, enable coreapi */
hwloc_debug("levelzero: sysman/memory failed, enabling coreapi memory queries\n");
memory_from_coreapi = 1;
}
first = 0;
}
if (memory_from_coreapi > 0) {
unsigned k;
int ignore_ddr = (memory_from_coreapi != 2) && is_integrated; /* DDR ignored in integrated GPUs, it's like the host DRAM */
hwloc__levelzero_memory_get_from_coreapi(h, root_osdev, ignore_ddr);
for(k=0; k<nr_subdevices; k++)
hwloc__levelzero_memory_get_from_coreapi(subh[k], sub_osdevs[k], ignore_ddr);
} else {
hwloc__levelzero_memory_get_from_sysman(h, root_osdev, nr_subdevices, sub_osdevs);
/* no need to call hwloc__levelzero_memory_get() on subdevices,
* the call on the root device is enough (and identical to a call on subdevices)
*/
}
}
struct hwloc_levelzero_ports {
unsigned nr_allocated;
unsigned nr;
struct hwloc_levelzero_port {
hwloc_obj_t osdev;
zes_fabric_port_properties_t props;
zes_fabric_port_state_t state;
} *ports;
};
static void
hwloc__levelzero_ports_init(struct hwloc_levelzero_ports *hports)
{
hports->nr_allocated = 0;
hports->nr = 0;
hports->ports = NULL;
free(hports->ports);
}
static void
hwloc__levelzero_ports_get(zes_device_handle_t dvh,
hwloc_obj_t root_osdev,
unsigned nr_sub_osdevs, hwloc_obj_t *sub_osdevs,
struct hwloc_levelzero_ports *hports)
{
zes_fabric_port_handle_t *ports;
uint32_t nr_new = 0;
unsigned i;
ze_result_t res;
res = zesDeviceEnumFabricPorts(dvh, &nr_new, NULL);
if (res != ZE_RESULT_SUCCESS || !nr_new)
return;
hwloc_debug("L0 device %s has %u fabric ports\n", root_osdev->name, nr_new);
if (hports->nr_allocated - hports->nr < nr_new) {
/* we must extend the array */
struct hwloc_levelzero_port *tmp;
uint32_t new_nr_allocated;
/* Extend the array by 8x the number of ports in this device.
* This should mean a single allocation per 8 devices.
*/
new_nr_allocated = hports->nr_allocated + 8*nr_new;
tmp = realloc(hports->ports, new_nr_allocated * sizeof(*hports->ports));
if (!tmp)
return;
hports->ports = tmp;
hports->nr_allocated = new_nr_allocated;
}
ports = malloc(nr_new * sizeof(*ports));
if (!ports)
return;
res = zesDeviceEnumFabricPorts(dvh, &nr_new, ports);
for(i=0; i<nr_new; i++) {
unsigned id = hports->nr;
res = zesFabricPortGetProperties(ports[i], &hports->ports[id].props);
if (res != ZE_RESULT_SUCCESS)
continue;
if (hports->ports[id].props.onSubdevice) {
hwloc_debug(" port #%u is on subdevice #%u\n",
i, hports->ports[id].props.subdeviceId);
if (hports->ports[id].props.subdeviceId < nr_sub_osdevs) {
hports->ports[id].osdev = sub_osdevs[hports->ports[id].props.subdeviceId];
} else {
hwloc_debug(" no such subdevice exists, ignoring\n");
continue;
}
hports->ports[id].osdev = root_osdev;
}
res = zesFabricPortGetState(ports[i], &hports->ports[id].state);
if (res != ZE_RESULT_SUCCESS)
continue;
if (hports->ports[id].state.status != ZES_FABRIC_PORT_STATUS_HEALTHY
&& hports->ports[id].state.status != ZES_FABRIC_PORT_STATUS_DEGRADED) {
hwloc_debug(" status (%u) isn't healthy or degraded\n",
(unsigned)hports->ports[id].state.status);
continue;
}
hwloc_debug(" status is %s, this will be our hport #%u\n",
hports->ports[id].state.status == ZES_FABRIC_PORT_STATUS_HEALTHY ? "healthy" : "degraded",
id);
hwloc_debug(" portId %u-%u-%u is connected to remote portId %u-%u-%u\n",
hports->ports[id].props.portId.fabricId,
hports->ports[id].props.portId.attachId,
hports->ports[id].props.portId.portNumber,
hports->ports[id].state.remotePortId.fabricId,
hports->ports[id].state.remotePortId.attachId,
hports->ports[id].state.remotePortId.portNumber);
hports->nr++;
}
free(ports);
}
static int
hwloc__levelzero_ports_add_xelink_bandwidth(struct hwloc_topology *topology,
struct hwloc_osdev_array *oarray,
hwloc_uint64_t *bws)
{
void *handle;
int err;
handle = hwloc_backend_distances_add_create(topology, "XeLinkBandwidth",
HWLOC_DISTANCES_KIND_FROM_OS|HWLOC_DISTANCES_KIND_MEANS_BANDWIDTH,
0);
if (!handle)
goto out;
err = hwloc_backend_distances_add_values(topology, handle, oarray->nr, oarray->objs, bws, 0);
if (err < 0)
goto out;
/* arrays are now attached to the handle */
oarray->objs = NULL;
bws = NULL;
err = hwloc_backend_distances_add_commit(topology, handle, 0 /* don't group GPUs */);
if (err < 0)
goto out;
return 0;
out:
free(bws);
return -1;
}
static int
hwloc__levelzero_ports_connect(struct hwloc_topology *topology,
struct hwloc_osdev_array *oarray,
struct hwloc_levelzero_ports *hports)
{
hwloc_uint64_t *bws;
unsigned i, j, k;
int gotbw = 0;
if (!hports->nr)
return 0;
bws = calloc(oarray->nr * oarray->nr, sizeof(*bws));
if (!bws)
return -1;
for(i=0; i<hports->nr; i++) {
if (hports->ports[i].state.status == ZES_FABRIC_PORT_STATUS_HEALTHY) {
for(j=0; j<hports->nr; j++) {
if (i==j)
continue;
if (hports->ports[i].state.remotePortId.fabricId == hports->ports[j].props.portId.fabricId
&& hports->ports[i].state.remotePortId.attachId == hports->ports[j].props.portId.attachId
&& hports->ports[i].state.remotePortId.portNumber == hports->ports[j].props.portId.portNumber) {
int iindex, jindex;
hwloc_debug("found L0 link model %s with %llu bit/s TX from hport #%u (osdev %s) to hport #%u (osdev %s)\n",
hports->ports[j].props.model,
(unsigned long long) hports->ports[i].state.rxSpeed.bitRate,
i,
hports->ports[i].osdev->name,
j,
hports->ports[j].osdev->name);
/* only keep XeLink for now */
if (strcmp(hports->ports[j].props.model, "XeLink"))
continue;
iindex = hwloc__levelzero_osdev_array_find(oarray, hports->ports[i].osdev);
jindex = hwloc__levelzero_osdev_array_find(oarray, hports->ports[j].osdev);
if (iindex<0 || jindex<0)
continue;
bws[iindex*oarray->nr+jindex] += hports->ports[i].state.rxSpeed.bitRate >> 20; /* MB/s */
/* TODO: way to accumulate subdevs bw into rootdevs? tranformation? different matrix? */
gotbw++;
}
}
}
}
if (!gotbw) {
free(bws);
return 0;
}
/* Add very high artifical values on the diagonal since local is faster than remote.
* Use 1TB/s for local, it somehow matches the HBM.
* Also between subdevices of the same parent, and between subdevice and parent (TODO improve this)
*
* WARNING: this assumes that parent and subdevices were added together
* in oarray[] in hwloc_levelzero_discover().
*/
for(i=0; i<oarray->nr; i++) {
unsigned nrsd = 0;
const char *s = hwloc_obj_get_info_by_name(oarray->objs[i], "LevelZeroSubdevices");
if (s)
nrsd = atoi(s);
/* set 1000000 for all devices between i and i+nrsd */
for(j=0; j<nrsd+1; j++)
for(k=0; k<nrsd+1; k++)
bws[(i+j)*oarray->nr+(i+k)] = 1000000;
/* skip subdevices */
i += nrsd;
}
return hwloc__levelzero_ports_add_xelink_bandwidth(topology, oarray, bws);
}
static void
hwloc__levelzero_ports_destroy(struct hwloc_levelzero_ports *hports)
{
free(hports->ports);
}
static int
hwloc_levelzero_discover(struct hwloc_backend *backend, struct hwloc_disc_status *dstatus)
{
/*
* This backend uses the underlying OS.
* However we don't enforce topology->is_thissystem so that
* we may still force use this backend when debugging with !thissystem.
*/
struct hwloc_topology *topology = backend->topology;
enum hwloc_type_filter_e filter;
ze_result_t res;
ze_driver_handle_t *drh;
uint32_t nbdrivers, i, k, zeidx, added = 0;
struct hwloc_osdev_array oarray;
struct hwloc_levelzero_ports hports;
int sysman_maybe_missing = 0; /* 1 if ZES_ENABLE_SYSMAN=1 was NOT set early, 2 if ZES_ENABLE_SYSMAN=0 */
char *env;
assert(dstatus->phase == HWLOC_DISC_PHASE_IO);
hwloc_topology_get_type_filter(topology, HWLOC_OBJ_OS_DEVICE, &filter);
if (filter == HWLOC_TYPE_FILTER_KEEP_NONE)
return 0;
hwloc__levelzero_osdev_array_init(&oarray);
hwloc__levelzero_ports_init(&hports);
#ifdef HWLOC_HAVE_ZESINIT
res = zesInit(0);
if (res != ZE_RESULT_SUCCESS) {
hwloc_debug("hwloc/levelzero: Failed to initialize LevelZero Sysman in zesInit(): 0x%x\n", (unsigned)res);
hwloc_debug("hwloc/levelzero: Continuing. Hopefully ZES_ENABLE_SYSMAN=1\n");
}
#endif /* HWLOC_HAVE_ZESINIT */
/* Tell L0 to create sysman devices.
* If somebody already initialized L0 without Sysman,
* zesDeviceGetProperties() will fail and warn in hwloc__levelzero_properties_get().
* The lib constructor and Windows DllMain tried to set ZES_ENABLE_SYSMAN=1 early (see topology.c),
* we try again in case they didn't.
*/
env = getenv("ZES_ENABLE_SYSMAN");
if (!env) {
/* setenv() is safer than putenv() but not available on Windows */
#ifdef HWLOC_WIN_SYS
putenv("ZES_ENABLE_SYSMAN=1");
#else
setenv("ZES_ENABLE_SYSMAN", "1", 1);
#endif
/* we'll warn in hwloc__levelzero_properties_get() if we fail to get zes devices */
sysman_maybe_missing = 1;
} else if (!atoi(env)) {
sysman_maybe_missing = 2;
}
res = zeInit(0);
if (res != ZE_RESULT_SUCCESS) {
if (HWLOC_SHOW_ALL_ERRORS()) {
fprintf(stderr, "hwloc/levelzero: Failed to initialize in zeInit(): 0x%x\n", (unsigned)res);
}
return 0;
}
nbdrivers = 0;
res = zeDriverGet(&nbdrivers, NULL);
if (res != ZE_RESULT_SUCCESS || !nbdrivers)
return 0;
hwloc_debug("hwloc/L0: found %u drivers\n", (unsigned) nbdrivers);
drh = malloc(nbdrivers * sizeof(*drh));
if (!drh)
return 0;
res = zeDriverGet(&nbdrivers, drh);
if (res != ZE_RESULT_SUCCESS) {
free(drh);
return 0;
}
zeidx = 0;
for(i=0; i<nbdrivers; i++) {
uint32_t nbdevices, j;
ze_device_handle_t *dvh;
char buffer[13];
nbdevices = 0;
res = zeDeviceGet(drh[i], &nbdevices, NULL);
if (res != ZE_RESULT_SUCCESS || !nbdevices)
continue;
hwloc_debug("hwloc/L0: found %u devices in driver #%u\n", (unsigned) nbdevices, (unsigned) i);
dvh = malloc(nbdevices * sizeof(*dvh));
if (!dvh)
continue;
res = zeDeviceGet(drh[i], &nbdevices, dvh);
if (res != ZE_RESULT_SUCCESS) {
free(dvh);
continue;
}
#if 0
/* No interesting info attr to get from driver properties for now.
* 2022/12/09: Driver UUID is driver version (major>>24|minor>>16|build) | a-uuid-timestamp>>32
* hence it's not stable across multiple runs
*/
ze_driver_properties_t drprop;
res = zeDriverGetProperties(drh[i], &drprop);
#endif
for(j=0; j<nbdevices; j++) {
zes_device_handle_t sdvh = dvh[j];
zes_device_handle_t *subh = NULL;
uint32_t nr_subdevices;
hwloc_obj_t osdev, parent, *subosdevs = NULL;
int is_integrated = 0;
osdev = hwloc_alloc_setup_object(topology, HWLOC_OBJ_OS_DEVICE, HWLOC_UNKNOWN_INDEX);
snprintf(buffer, sizeof(buffer), "ze%u", zeidx); // ze0d0 ?
osdev->name = strdup(buffer);
osdev->depth = HWLOC_TYPE_DEPTH_UNKNOWN;
osdev->attr->osdev.type = HWLOC_OBJ_OSDEV_COPROC;
osdev->subtype = strdup("LevelZero");
snprintf(buffer, sizeof(buffer), "%u", i);
hwloc_obj_add_info(osdev, "LevelZeroDriverIndex", buffer);
snprintf(buffer, sizeof(buffer), "%u", j);
hwloc_obj_add_info(osdev, "LevelZeroDriverDeviceIndex", buffer);
hwloc__levelzero_properties_get(dvh[j], osdev, sysman_maybe_missing, &is_integrated);
hwloc__levelzero_cqprops_get(dvh[j], osdev);
nr_subdevices = 0;
res = zeDeviceGetSubDevices(dvh[j], &nr_subdevices, NULL);
/* returns ZE_RESULT_ERROR_INVALID_ARGUMENT if there are no subdevices */
if (res == ZE_RESULT_SUCCESS && nr_subdevices > 0) {
char tmp[64];
snprintf(tmp, sizeof(tmp), "%u", nr_subdevices);
hwloc_obj_add_info(osdev, "LevelZeroSubdevices", tmp);
subh = malloc(nr_subdevices * sizeof(*subh));
subosdevs = malloc(nr_subdevices * sizeof(*subosdevs));
if (subosdevs && subh) {
zeDeviceGetSubDevices(dvh[j], &nr_subdevices, subh);
for(k=0; k<nr_subdevices; k++) {
subosdevs[k] = hwloc_alloc_setup_object(topology, HWLOC_OBJ_OS_DEVICE, HWLOC_UNKNOWN_INDEX);
snprintf(tmp, sizeof(tmp), "ze%u.%u", zeidx, k);
subosdevs[k]->name = strdup(tmp);
subosdevs[k]->depth = HWLOC_TYPE_DEPTH_UNKNOWN;
subosdevs[k]->attr->osdev.type = HWLOC_OBJ_OSDEV_COPROC;
subosdevs[k]->subtype = strdup("LevelZero");
snprintf(tmp, sizeof(tmp), "%u", k);
hwloc_obj_add_info(subosdevs[k], "LevelZeroSubdeviceID", tmp);
hwloc__levelzero_properties_get(subh[k], subosdevs[k], sysman_maybe_missing, NULL);
hwloc__levelzero_cqprops_get(subh[k], subosdevs[k]);
}
} else {
free(subosdevs);
free(subh);
subosdevs = NULL;
nr_subdevices = 0;
}
}
/* get all memory info at once */
hwloc__levelzero_memory_get(dvh[j], osdev, is_integrated, nr_subdevices, subh, subosdevs);
/* get all ports info at once */
if (!(hwloc_topology_get_flags(topology) & HWLOC_TOPOLOGY_FLAG_NO_DISTANCES))
hwloc__levelzero_ports_get(dvh[j], osdev, nr_subdevices, subosdevs, &hports);
parent = NULL;
#ifdef HWLOC_HAVE_ZEDEVICEPCIGETPROPERTIESEXT
{ /* try getting PCI BDF+speed from core extension */
ze_pci_ext_properties_t ext_pci;
ext_pci.stype = ZE_STRUCTURE_TYPE_PCI_EXT_PROPERTIES;
ext_pci.pNext = NULL;
res = zeDevicePciGetPropertiesExt(dvh[j], &ext_pci);
if (res == ZE_RESULT_SUCCESS) {
parent = hwloc_pci_find_parent_by_busid(topology,
ext_pci.address.domain,
ext_pci.address.bus,
ext_pci.address.device,
ext_pci.address.function);
if (parent && parent->type == HWLOC_OBJ_PCI_DEVICE) {
if (ext_pci.maxSpeed.maxBandwidth > 0)
parent->attr->pcidev.linkspeed = ((float)ext_pci.maxSpeed.maxBandwidth)/1000/1000/1000;
}
}
}
#endif /* HWLOC_HAVE_LEVELZERO_CORE_PCI_EXT */
if (!parent) {
/* try getting PCI BDF+speed from sysman */
zes_pci_properties_t pci;
res = zesDevicePciGetProperties(sdvh, &pci);
if (res == ZE_RESULT_SUCCESS) {
parent = hwloc_pci_find_parent_by_busid(topology,
pci.address.domain,
pci.address.bus,
pci.address.device,
pci.address.function);
if (parent && parent->type == HWLOC_OBJ_PCI_DEVICE) {
if (pci.maxSpeed.maxBandwidth > 0)
parent->attr->pcidev.linkspeed = ((float)pci.maxSpeed.maxBandwidth)/1000/1000/1000;
}
}
}
if (!parent)
parent = hwloc_get_root_obj(topology);
/* WARNING: parent and its subdevices are inserted together in oarray[].
* this is required when filling the BW matrix at the end of hwloc__levelzero_ports_connect()
*/
hwloc_insert_object_by_parent(topology, parent, osdev);
hwloc__levelzero_osdev_array_add(&oarray, osdev);
added++;
if (nr_subdevices) {
for(k=0; k<nr_subdevices; k++)
if (subosdevs[k]) {
hwloc_insert_object_by_parent(topology, osdev, subosdevs[k]);
hwloc__levelzero_osdev_array_add(&oarray, subosdevs[k]);
added++;
}
free(subosdevs);
free(subh);
}
zeidx++;
}
free(dvh);
}
hwloc__levelzero_ports_connect(topology, &oarray, &hports);
hwloc__levelzero_ports_destroy(&hports);
hwloc__levelzero_osdev_array_free(&oarray);
free(drh);
if (added)
hwloc_modify_infos(hwloc_topology_get_infos(topology), HWLOC_MODIFY_INFOS_OP_ADD, "Backend", "LevelZero");
return 0;
}
static struct hwloc_backend *
hwloc_levelzero_component_instantiate(struct hwloc_topology *topology,
struct hwloc_disc_component *component,
unsigned excluded_phases __hwloc_attribute_unused,
const void *_data1 __hwloc_attribute_unused,
const void *_data2 __hwloc_attribute_unused,
const void *_data3 __hwloc_attribute_unused)
{
struct hwloc_backend *backend;
backend = hwloc_backend_alloc(topology, component, 0);
if (!backend)
return NULL;
backend->discover = hwloc_levelzero_discover;
return backend;
}
static struct hwloc_disc_component hwloc_levelzero_disc_component = {
"levelzero",
HWLOC_DISC_PHASE_IO,
HWLOC_DISC_PHASE_GLOBAL,
hwloc_levelzero_component_instantiate,
10, /* after pci */
1,
NULL
};
static int
hwloc_levelzero_component_init(unsigned long flags)
{
if (flags)
return -1;
if (hwloc_plugin_check_namespace("levelzero", "hwloc_backend_alloc") < 0)
return -1;
return 0;
}
#ifdef HWLOC_INSIDE_PLUGIN
HWLOC_DECLSPEC extern const struct hwloc_component hwloc_levelzero_component;
#endif
const struct hwloc_component hwloc_levelzero_component = {
HWLOC_COMPONENT_ABI,
hwloc_levelzero_component_init, NULL,
HWLOC_COMPONENT_TYPE_DISC,
0,
&hwloc_levelzero_disc_component
};