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comparison src/os/linux/vm/gpu_linux.cpp @ 13819:49db2c1e3bee

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added support for co-existing GPU backends (JBS:GRAAL-1)
author Doug Simon <doug.simon@oracle.com>
date Thu, 30 Jan 2014 00:52:33 +0100
parents src/os_gpu/linux_ptx/vm/gpu_linux.cpp@5465ba051280
children 5c8a3c09397b
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13818:d2f520f46180 13819:49db2c1e3bee
1 /*
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "runtime/gpu.hpp"
26 #include "utilities/ostream.hpp"
27
28 /*
29 * Probe for CUDA device on PCI bus using /proc/bus/pci/devices. Do
30 * not rely on CUDA tool kit being installed. We will check if CUDA
31 * library is installed later.
32 */
33
34 static unsigned int nvidia_vendor_id = 0x10de;
35 static unsigned int amd_vendor_id = 0x1002;
36
37 jobject gpu::probe_gpus(JNIEnv* env) {
38 bool hsail = false;
39 bool ptx = false;
40
41 if (UseHSAILSimulator && gpu::Hsail::register_natives(env)) {
42 hsail = true;
43 }
44
45 /*
46 * Open /proc/bus/pci/devices to look for the first GPU device. For
47 * now, we will just find the first GPU device. Will need to revisit
48 * this to support execution on multiple GPU devices, if they exist.
49 */
50 FILE *pci_devices = fopen("/proc/bus/pci/devices", "r");
51 char contents[4096];
52 unsigned int bus_num_devfn_ign;
53 unsigned int vendor;
54 unsigned int device;
55 if (pci_devices == NULL) {
56 tty->print_cr("*** Failed to open /proc/bus/pci/devices");
57 return NULL;
58 }
59
60 while (fgets(contents, sizeof(contents)-1, pci_devices)) {
61 sscanf(contents, "%04x%04x%04x", &bus_num_devfn_ign, &vendor, &device);
62 /* Break after finding the first GPU device. */
63 if (vendor == nvidia_vendor_id) {
64 if (TraceGPUInteraction) {
65 tty->print_cr("Found supported nVidia GPU: vendor=0x%04x, device=0x%04x", vendor, device);
66 }
67 if (!ptx && gpu::Ptx::register_natives(env)) {
68 ptx = true;
69 }
70 }
71 }
72
73 // Close file pointer.
74 fclose(pci_devices);
75
76 const char* gpus = "";
77 if (ptx && hsail) {
78 gpus = "PTX,HSAIL";
79 } else if (ptx) {
80 gpus = "PTX";
81 } else if (hsail) {
82 gpus = "HSAIL";
83 }
84 return env->NewStringUTF(gpus);
85 }