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Fix PyTorch init time due to inefficient libdrm search for amdgpu.ids #1412

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malfet merged 1 commit into from
Jun 5, 2023
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Fix PyTorch init time due to inefficient libdrm search for amdgpu.ids #1412

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73 changes: 44 additions & 29 deletions common/install_rocm_drm.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -32,13 +32,13 @@ pushd drm
###########################
patch -p1 <<'EOF'
diff --git a/amdgpu/amdgpu_asic_id.c b/amdgpu/amdgpu_asic_id.c
index a5007ffc..a3627529 100644
index a5007ffc..13fa07fc 100644
--- a/amdgpu/amdgpu_asic_id.c
+++ b/amdgpu/amdgpu_asic_id.c
@@ -22,6 +22,13 @@
*
*/

+#define _XOPEN_SOURCE 700
+#define _LARGEFILE64_SOURCE
+#define _FILE_OFFSET_BITS 64
Expand All @@ -49,20 +49,18 @@ index a5007ffc..a3627529 100644
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
@@ -34,6 +41,21 @@
@@ -34,6 +41,19 @@
#include "amdgpu_drm.h"
#include "amdgpu_internal.h"

+static char *amdgpuids_path = NULL;
+static const char* amdgpuids_path_msg = NULL;
+
+static int check_for_location_of_amdgpuids(const char *filepath, const struct stat *info, const int typeflag, struct FTW *pathinfo)
+{
+ if (typeflag == FTW_F && strstr(filepath, "amdgpu.ids")) {
+ if (NULL != amdgpuids_path) {
+ free(amdgpuids_path);
+ }
+ amdgpuids_path = strdup(filepath);
+ return 0;
+ return 1;
Comment thread
jithunnair-amd marked this conversation as resolved.
+ }
+
+ return 0;
Expand All @@ -71,16 +69,20 @@ index a5007ffc..a3627529 100644
static int parse_one_line(struct amdgpu_device *dev, const char *line)
{
char *buf, *saveptr;
@@ -113,13 +135,48 @@ void amdgpu_parse_asic_ids(struct amdgpu_device *dev)
@@ -113,10 +133,46 @@ void amdgpu_parse_asic_ids(struct amdgpu_device *dev)
int line_num = 1;
int r = 0;

- fp = fopen(AMDGPU_ASIC_ID_TABLE, "r");

+ // attempt to find typical location for amdgpu.ids file
fp = fopen(AMDGPU_ASIC_ID_TABLE, "r");
+
+ // if it doesn't exist, search
+ if (!fp) {
+
+ char self_path[ PATH_MAX ];
+ ssize_t count;
+ ssize_t i;
+
+ fp = NULL;
+ count = readlink( "/proc/self/exe", self_path, PATH_MAX );
+ if (count > 0) {
+ self_path[count] = '\0';
Expand All @@ -97,30 +99,43 @@ index a5007ffc..a3627529 100644
+ }
+ self_path[i] = '\0';
+
+ if (0 == nftw(self_path, check_for_location_of_amdgpuids, 5, FTW_PHYS)) {
+ if (amdgpuids_path) {
+ fp = fopen(amdgpuids_path, "r");
+ if (!fp) {
+ fprintf(stderr, "%s: %s\n", amdgpuids_path, strerror(errno));
+ }
+ }
+ if (1 == nftw(self_path, check_for_location_of_amdgpuids, 5, FTW_PHYS)) {
+ fp = fopen(amdgpuids_path, "r");
+ amdgpuids_path_msg = amdgpuids_path;
+ }
+ }
+
+ if (!fp) {
+ }
+ else {
+ amdgpuids_path_msg = AMDGPU_ASIC_ID_TABLE;
+ }
+
+ fp = fopen(AMDGPU_ASIC_ID_TABLE, "r");
+ // both hard-coded location and search have failed
if (!fp) {
fprintf(stderr, "%s: %s\n", AMDGPU_ASIC_ID_TABLE,
strerror(errno));
- fprintf(stderr, "%s: %s\n", AMDGPU_ASIC_ID_TABLE,
- strerror(errno));
+ fprintf(stderr, "amdgpu.ids: No such file or directory\n");
return;
}

+ }
+
/* 1st valid line is file version */
while ((n = getline(&line, &len, fp)) != -1) {
/* trim trailing newline */

@@ -132,7 +188,7 @@ void amdgpu_parse_asic_ids(struct amdgpu_device *dev)
continue;
}

- drmMsg("%s version: %s\n", AMDGPU_ASIC_ID_TABLE, line);
+ drmMsg("%s version: %s\n", amdgpuids_path_msg, line);
break;
}

@@ -150,7 +206,7 @@ void amdgpu_parse_asic_ids(struct amdgpu_device *dev)

if (r == -EINVAL) {
fprintf(stderr, "Invalid format: %s: line %d: %s\n",
- AMDGPU_ASIC_ID_TABLE, line_num, line);
+ amdgpuids_path_msg, line_num, line);
} else if (r && r != -EAGAIN) {
fprintf(stderr, "%s: Cannot parse ASIC IDs: %s\n",
__func__, strerror(-r));
EOF

###########################
Expand Down