src/hotspot/os/aix/libperfstat_aix.cpp
author clanger
Wed, 31 Jan 2018 16:48:41 +0100
changeset 48822 8a9808a9dd6b
parent 47216 71c04702a3d5
permissions -rw-r--r--
8196487: AIX: os::get_summary_cpu_info does not need to call into libperfstat Reviewed-by: goetz, stuefe
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/*
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 * Copyright (c) 2012, 2018 SAP SE. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "libperfstat_aix.hpp"
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#include "misc_aix.hpp"
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#include <dlfcn.h>
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// Handle to the libperfstat.
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static void* g_libhandle = NULL;
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typedef int (*fun_perfstat_cpu_total_t) (perfstat_id_t *name, PERFSTAT_CPU_TOTAL_T_LATEST* userbuff,
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                                         int sizeof_userbuff, int desired_number);
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typedef int (*fun_perfstat_memory_total_t) (perfstat_id_t *name, perfstat_memory_total_t* userbuff,
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                                            int sizeof_userbuff, int desired_number);
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typedef int (*fun_perfstat_partition_total_t) (perfstat_id_t *name,
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    PERFSTAT_PARTITON_TOTAL_T_LATEST* userbuff, int sizeof_userbuff,
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    int desired_number);
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typedef int (*fun_perfstat_wpar_total_t) (perfstat_id_wpar_t *name,
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    PERFSTAT_WPAR_TOTAL_T_LATEST* userbuff, int sizeof_userbuff,
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    int desired_number);
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typedef void (*fun_perfstat_reset_t) ();
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typedef cid_t (*fun_wpar_getcid_t) ();
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static fun_perfstat_cpu_total_t     g_fun_perfstat_cpu_total = NULL;
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static fun_perfstat_memory_total_t  g_fun_perfstat_memory_total = NULL;
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static fun_perfstat_partition_total_t g_fun_perfstat_partition_total = NULL;
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static fun_perfstat_wpar_total_t    g_fun_perfstat_wpar_total = NULL;
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static fun_perfstat_reset_t         g_fun_perfstat_reset = NULL;
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static fun_wpar_getcid_t            g_fun_wpar_getcid = NULL;
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bool libperfstat::init() {
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  // Dynamically load the libperfstat porting library.
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  g_libhandle = dlopen("/usr/lib/libperfstat.a(shr_64.o)", RTLD_MEMBER | RTLD_NOW);
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  if (!g_libhandle) {
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    trcVerbose("Cannot load libperfstat.a (dlerror: %s)", dlerror());
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    return false;
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  }
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  // Resolve function pointers
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#define RESOLVE_FUN_NO_ERROR(name) \
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  g_fun_##name = (fun_##name##_t) dlsym(g_libhandle, #name);
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#define RESOLVE_FUN(name) \
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  RESOLVE_FUN_NO_ERROR(name) \
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  if (!g_fun_##name) { \
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    trcVerbose("Cannot resolve " #name "() from libperfstat.a\n" \
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                      "   (dlerror: %s)", dlerror()); \
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    return false; \
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  }
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  // These functions may or may not be there depending on the OS release.
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  RESOLVE_FUN_NO_ERROR(perfstat_partition_total);
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  RESOLVE_FUN_NO_ERROR(perfstat_wpar_total);
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  RESOLVE_FUN_NO_ERROR(wpar_getcid);
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  // These functions are required for every release.
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  RESOLVE_FUN(perfstat_cpu_total);
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  RESOLVE_FUN(perfstat_memory_total);
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  RESOLVE_FUN(perfstat_reset);
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  trcVerbose("libperfstat loaded.");
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  return true;
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}
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void libperfstat::cleanup() {
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  if (g_libhandle) {
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    dlclose(g_libhandle);
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    g_libhandle = NULL;
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  }
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  g_fun_perfstat_cpu_total = NULL;
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  g_fun_perfstat_memory_total = NULL;
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  g_fun_perfstat_partition_total = NULL;
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  g_fun_perfstat_wpar_total = NULL;
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  g_fun_perfstat_reset = NULL;
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  g_fun_wpar_getcid = NULL;
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}
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int libperfstat::perfstat_memory_total(perfstat_id_t *name,
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                                       perfstat_memory_total_t* userbuff,
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                                       int sizeof_userbuff, int desired_number) {
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  if (g_fun_perfstat_memory_total == NULL) {
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    return -1;
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  }
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  return g_fun_perfstat_memory_total(name, userbuff, sizeof_userbuff, desired_number);
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}
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int libperfstat::perfstat_cpu_total(perfstat_id_t *name, PERFSTAT_CPU_TOTAL_T_LATEST* userbuff,
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                                    int sizeof_userbuff, int desired_number) {
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  if (g_fun_perfstat_cpu_total == NULL) {
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    return -1;
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  }
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  return g_fun_perfstat_cpu_total(name, userbuff, sizeof_userbuff, desired_number);
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}
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int libperfstat::perfstat_partition_total(perfstat_id_t *name, PERFSTAT_PARTITON_TOTAL_T_LATEST* userbuff,
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                                          int sizeof_userbuff, int desired_number) {
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  if (g_fun_perfstat_partition_total == NULL) {
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    return -1;
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  }
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  return g_fun_perfstat_partition_total(name, userbuff, sizeof_userbuff, desired_number);
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}
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int libperfstat::perfstat_wpar_total(perfstat_id_wpar_t *name, PERFSTAT_WPAR_TOTAL_T_LATEST* userbuff,
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                                     int sizeof_userbuff, int desired_number) {
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  if (g_fun_perfstat_wpar_total == NULL) {
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    return -1;
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  }
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  return g_fun_perfstat_wpar_total(name, userbuff, sizeof_userbuff, desired_number);
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}
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void libperfstat::perfstat_reset() {
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  if (g_fun_perfstat_reset != NULL) {
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    g_fun_perfstat_reset();
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  }
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}
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cid_t libperfstat::wpar_getcid() {
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  if (g_fun_wpar_getcid == NULL) {
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    return (cid_t) -1;
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  }
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  return g_fun_wpar_getcid();
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}
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//////////////////// convenience functions, release-independent /////////////////////////////
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// Retrieve global cpu information.
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bool libperfstat::get_cpuinfo(cpuinfo_t* pci) {
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  assert(pci, "get_cpuinfo: invalid parameter");
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  memset(pci, 0, sizeof(cpuinfo_t));
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  PERFSTAT_CPU_TOTAL_T_LATEST psct;
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  memset (&psct, '\0', sizeof(psct));
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  if (-1 == libperfstat::perfstat_cpu_total(NULL, &psct, sizeof(PERFSTAT_CPU_TOTAL_T_LATEST), 1)) {
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    if (-1 == libperfstat::perfstat_cpu_total(NULL, &psct, sizeof(perfstat_cpu_total_t_71), 1)) {
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      if (-1 == libperfstat::perfstat_cpu_total(NULL, &psct, sizeof(perfstat_cpu_total_t_61), 1)) {
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        if (-1 == libperfstat::perfstat_cpu_total(NULL, &psct, sizeof(perfstat_cpu_total_t_53), 1)) {
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          trcVerbose("perfstat_cpu_total() failed (errno=%d)", errno);
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          return false;
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        }
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      }
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    }
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  }
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  // Global cpu information.
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  strcpy(pci->description, psct.description);
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  pci->processorHZ = psct.processorHZ;
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  pci->ncpus = psct.ncpus;
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  for (int i = 0; i < 3; i++) {
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    pci->loadavg[i] = (double) psct.loadavg[i] / (1 << SBITS);
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  }
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  pci->user_clock_ticks = psct.user;
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  pci->sys_clock_ticks  = psct.sys;
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  pci->idle_clock_ticks = psct.idle;
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  pci->wait_clock_ticks = psct.wait;
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  return true;
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}
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// Retrieve partition information.
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bool libperfstat::get_partitioninfo(partitioninfo_t* ppi) {
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  assert(ppi, "get_partitioninfo: invalid parameter");
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  memset(ppi, 0, sizeof(partitioninfo_t));
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  PERFSTAT_PARTITON_TOTAL_T_LATEST pspt;
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  memset(&pspt, '\0', sizeof(pspt));
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  bool ame_details = true;
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  if (-1 == libperfstat::perfstat_partition_total(NULL, &pspt, sizeof(PERFSTAT_PARTITON_TOTAL_T_LATEST), 1)) {
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    if (-1 == libperfstat::perfstat_partition_total(NULL, &pspt, sizeof(perfstat_partition_total_t_71), 1)) {
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      ame_details = false;
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      if (-1 == libperfstat::perfstat_partition_total(NULL, &pspt, sizeof(perfstat_partition_total_t_61), 1)) {
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        if (-1 == libperfstat::perfstat_partition_total(NULL, &pspt, sizeof(perfstat_partition_total_t_53), 1)) {
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          if (-1 == libperfstat::perfstat_partition_total(NULL, &pspt, sizeof(perfstat_partition_total_t_53_5), 1)) {
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            trcVerbose("perfstat_partition_total() failed (errno=%d)", errno);
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            return false;
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          }
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        }
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      }
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    }
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  }
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  // partition type info
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  ppi->shared_enabled = pspt.type.b.shared_enabled;
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  ppi->smt_capable = pspt.type.b.smt_capable;
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  ppi->smt_enabled = pspt.type.b.smt_enabled;
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  ppi->lpar_capable = pspt.type.b.lpar_capable;
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  ppi->lpar_enabled = pspt.type.b.lpar_enabled;
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  ppi->dlpar_capable = pspt.type.b.dlpar_capable;
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  ppi->capped = pspt.type.b.capped;
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  ppi->kernel_is_64 = pspt.type.b.kernel_is_64;
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  ppi->pool_util_authority = pspt.type.b.pool_util_authority;
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  ppi->donate_capable = pspt.type.b.donate_capable;
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  ppi->donate_enabled = pspt.type.b.donate_enabled;
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  ppi->ams_capable = pspt.type.b.ams_capable;
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  ppi->ams_enabled = pspt.type.b.ams_enabled;
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  ppi->power_save = pspt.type.b.power_save;
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  ppi->ame_enabled = pspt.type.b.ame_enabled;
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  // partition total info
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  ppi->online_cpus = pspt.online_cpus;
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  ppi->entitled_proc_capacity = pspt.entitled_proc_capacity;
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  ppi->var_proc_capacity_weight = pspt.var_proc_capacity_weight;
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  ppi->phys_cpus_pool = pspt.phys_cpus_pool;
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  ppi->pool_id = pspt.pool_id;
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  ppi->entitled_pool_capacity = pspt.entitled_pool_capacity;
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  strcpy(ppi->name, pspt.name);
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  // Added values to ppi that we need for later computation of cpu utilization
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  // ( pool authorization needed for pool_idle_time ??? )
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  ppi->timebase_last   = pspt.timebase_last;
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  ppi->pool_idle_time  = pspt.pool_idle_time;
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  ppi->pcpu_tics_user  = pspt.puser;
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  ppi->pcpu_tics_sys   = pspt.psys;
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  ppi->pcpu_tics_idle  = pspt.pidle;
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  ppi->pcpu_tics_wait  = pspt.pwait;
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  // Additional AME information.
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  if (ame_details) {
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    ppi->true_memory = pspt.true_memory * 4096;
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    ppi->expanded_memory = pspt.expanded_memory * 4096;
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    ppi->target_memexp_factr = pspt.target_memexp_factr;
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    ppi->current_memexp_factr = pspt.current_memexp_factr;
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    ppi->cmcs_total_time = pspt.cmcs_total_time;
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  }
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  return true;
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}
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// Retrieve wpar information.
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bool libperfstat::get_wparinfo(wparinfo_t* pwi) {
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  assert(pwi, "get_wparinfo: invalid parameter");
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  memset(pwi, 0, sizeof(wparinfo_t));
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  if (libperfstat::wpar_getcid() <= 0) {
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    return false;
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  }
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  PERFSTAT_WPAR_TOTAL_T_LATEST pswt;
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  memset (&pswt, '\0', sizeof(pswt));
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  if (-1 == libperfstat::perfstat_wpar_total(NULL, &pswt, sizeof(PERFSTAT_WPAR_TOTAL_T_LATEST), 1)) {
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    if (-1 == libperfstat::perfstat_wpar_total(NULL, &pswt, sizeof(perfstat_wpar_total_t_61), 1)) {
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      trcVerbose("perfstat_wpar_total() failed (errno=%d)", errno);
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      return false;
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    }
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  }
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  // WPAR type info.
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  pwi->app_wpar = pswt.type.b.app_wpar;
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  pwi->cpu_rset = pswt.type.b.cpu_rset;
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  pwi->cpu_xrset = pswt.type.b.cpu_xrset;
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  pwi->cpu_limits = pswt.type.b.cpu_limits;
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  pwi->mem_limits = pswt.type.b.mem_limits;
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  // WPAR total info.
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  strcpy(pwi->name, pswt.name);
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  pwi->wpar_id = pswt.wpar_id;
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  pwi->cpu_limit = pswt.cpu_limit;
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  pwi->mem_limit = pswt.mem_limit;
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  return true;
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}