/* * Copyright (c) 2016, 2022, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions.
*/
uint32_t ZNUMA::count() { if (!_enabled) { // NUMA support not enabled return 1;
}
return os::Linux::numa_max_node() + 1;
}
uint32_t ZNUMA::id() { if (!_enabled) { // NUMA support not enabled return 0;
}
return os::Linux::get_node_by_cpu(ZCPU::id());
}
uint32_t ZNUMA::memory_id(uintptr_t addr) { if (!_enabled) { // NUMA support not enabled, assume everything belongs to node zero return 0;
}
uint32_t id = (uint32_t)-1;
if (ZSyscall::get_mempolicy((int*)&id, NULL, 0, (void*)addr, MPOL_F_NODE | MPOL_F_ADDR) == -1) {
ZErrno err;
fatal("Failed to get NUMA id for memory at " PTR_FORMAT " (%s)", addr, err.to_string());
}
assert(id < count(), "Invalid NUMA id");
return id;
}
Messung V0.5
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