869d43f102
- Instead of displaying hardware ram quantity, display ram available to be allocated by applications. FreeBSD uses some ram for kernel, segment mappings and other stuff. Those memory pages are not available for allocation by applications. - Calculate correctly ram usage. Active + Wired (buffers). Nothing else. For more info see: - http://www.cyberciti.biz/files/scripts/freebsd-memory.pl.txt - conky source code on github - output of top and vmstat on FreeBSD - http://www.zabbix.com/forum/showthread.php?t=21826 - https://support.zabbix.com/browse/ZBXNEXT-774 htop on FreeBSD uses linux procfs compatibility layer, and thus it's readings are a little off.
84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
/* vim: tabstop=2 shiftwidth=2 expandtab textwidth=80 linebreak wrap
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*
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* Copyright 2012 Matthew McCormick
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* Copyright 2015 Pawel 'l0ner' Soltys
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// Based on: github.com/freebsd/freebsd/blob/master/usr.bin/top/machine.c
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// Based on: Apple.cpp for load_string/mem_string and apple's documentation
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#include <sstream>
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#include <string>
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#include <sys/types.h>
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#include "getsysctl.h"
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#include "memory.h"
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#include "luts.h"
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#include "conversions.h"
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std::string mem_string( bool use_colors = false )
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{
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// These values are in bytes
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//u_int total;
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//u_int free;
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//u_int inactive;
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//u_int cache;
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u_int wired;
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u_int active;
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u_int page_size;
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u_int page_count;
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std::ostringstream oss;
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// Get total physical memory, page size, and some other needed info
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// instead of using realmem which reports quantity of ram installed on
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// platform, use physmem which reports ram available to system.
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//GETSYSCTL( "hw.physmem", total );
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GETSYSCTL( "hw.pagesize", page_size );
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// page count reflects actual size of memory we have available for
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// applications. it will be less than realmem or physmem, since it doesn't
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// include what's been allocated for kernel, but it will be equal to
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// free + inactive + cache + wired + active, and thus will reflect better
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// what's actually available.
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GETSYSCTL( "vm.stats.vm.v_page_count", page_count );
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//GETSYSCTL( "vm.stats.vm.v_free_count", free );
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//GETSYSCTL( "vm.stats.vm.v_inactive_count", inactive );
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//GETSYSCTL( "vm.stats.vm.v_cache_count", cache );
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GETSYSCTL( "vm.stats.vm.v_wire_count", wired ); // Buffers
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GETSYSCTL( "vm.stats.vm.v_active_count", active );
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// Get all memory which can be allocated, which on FreeBSD is:
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// cached + inactive + free
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//u_int unused = ( cache + inactive + free ) * page_size;
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// Used memory on FreeBSD is active + wired.
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u_int used = ( active + wired ) * page_size;
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if( use_colors )
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{
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oss << mem_lut[ ( 100 * used ) / ( page_count * page_size ) ];
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}
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oss << convert_unit( used, MEGABYTES ) << '/'
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<< convert_unit( page_count * page_size, MEGABYTES ) << "MB";
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if( use_colors )
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{
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oss << "#[fg=default,bg=default]";
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}
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return oss.str();
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}
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