How does Top process manager get memory information?
I am trying to learn about the Top process manager for Linux. I am trying to understand how Top gets its memory information. So far I have found some memory code in Top.c and Top.h to display the data but I can't see how exactly is getting its memory information from the Operating System.
Is top using /proc/meminfo or using some kind of system call to get the information?
In Top.c
// Display Memory and Swap stats
meminfo();
if (CHKw(Curwin, View_MEMORY)) {
show_special(0, fmtmk(MEMORY_line1
, kb_main_total, kb_main_used, kb_main_free, kb_main_buffers));
show_special(0, fmtmk(MEMORY_line2
, kb_swap_total, kb_swap_used, kb_swap_free, kb_main_cached));
Msg_row += 2;
}
Top.h
#define MEMORY_line1 "Mem: 3"
" %8luK 2total,3 %8luK 2used,3 %8luK 2free,3 %8luK 2buffers3n"
linux kernel top
asked 2 hours ago
Ninja2kNinja2k
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I am trying to learn about the Top process manager for Linux. I am trying to understand how Top gets its memory information. So far I have found some memory code in Top.c and Top.h to display the data but I can't see how exactly is getting its memory information from the Operating System.
Is top using /proc/meminfo or using some kind of system call to get the information?
In Top.c
// Display Memory and Swap stats
meminfo();
if (CHKw(Curwin, View_MEMORY)) {
show_special(0, fmtmk(MEMORY_line1
, kb_main_total, kb_main_used, kb_main_free, kb_main_buffers));
show_special(0, fmtmk(MEMORY_line2
, kb_swap_total, kb_swap_used, kb_swap_free, kb_main_cached));
Msg_row += 2;
}
Top.h
#define MEMORY_line1 "Mem: 3"
" %8luK 2total,3 %8luK 2used,3 %8luK 2free,3 %8luK 2buffers3n"
linux kernel top
asked 2 hours ago
Ninja2kNinja2k
101
New contributor
Ninja2k is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I am trying to learn about the Top process manager for Linux. I am trying to understand how Top gets its memory information. So far I have found some memory code in Top.c and Top.h to display the data but I can't see how exactly is getting its memory information from the Operating System.
Is top using /proc/meminfo or using some kind of system call to get the information?
In Top.c
// Display Memory and Swap stats
meminfo();
if (CHKw(Curwin, View_MEMORY)) {
show_special(0, fmtmk(MEMORY_line1
, kb_main_total, kb_main_used, kb_main_free, kb_main_buffers));
show_special(0, fmtmk(MEMORY_line2
, kb_swap_total, kb_swap_used, kb_swap_free, kb_main_cached));
Msg_row += 2;
}
Top.h
#define MEMORY_line1 "Mem: 3"
" %8luK 2total,3 %8luK 2used,3 %8luK 2free,3 %8luK 2buffers3n"
linux kernel top
asked 2 hours ago
Ninja2kNinja2k
101
New contributor
Ninja2k is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I am trying to learn about the Top process manager for Linux. I am trying to understand how Top gets its memory information. So far I have found some memory code in Top.c and Top.h to display the data but I can't see how exactly is getting its memory information from the Operating System.
Is top using /proc/meminfo or using some kind of system call to get the information?
In Top.c
// Display Memory and Swap stats
meminfo();
if (CHKw(Curwin, View_MEMORY)) {
show_special(0, fmtmk(MEMORY_line1
, kb_main_total, kb_main_used, kb_main_free, kb_main_buffers));
show_special(0, fmtmk(MEMORY_line2
, kb_swap_total, kb_swap_used, kb_swap_free, kb_main_cached));
Msg_row += 2;
}
Top.h
#define MEMORY_line1 "Mem: 3"
" %8luK 2total,3 %8luK 2used,3 %8luK 2free,3 %8luK 2buffers3n"
linux kernel top
linux kernel top
asked 2 hours ago
Ninja2kNinja2k
101
New contributor
Ninja2k is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
Ninja2kNinja2k
101
New contributor
Ninja2k is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
Ninja2kNinja2k
101
New contributor
Ninja2k is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
Ninja2kNinja2k
101
asked 2 hours ago
Ninja2kNinja2k
101
101
New contributor
Ninja2k is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Ninja2k is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Ninja2k is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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