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nmeter: %[md] %[mw] - dirty file-backed pages, writeback pages

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function                                             old     new   delta
collect_mem                                          333     387     +54
.rodata                                           104369  104380     +11
packed_usage                                       34184   34175      -9
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(add/remove: 0/0 grow/shrink: 2/1 up/down: 65/-9)              Total: 56 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2022-01-11 19:32:16 +01:00
parent ff8fda8482
commit 524fecf7c3
1 changed files with 35 additions and 11 deletions
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46
procps/nmeter.c
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@ -27,6 +27,8 @@
//usage: "\n (displays: S:system U:user N:niced D:iowait I:irq i:softirq)"
//usage: "\n %[nINTERFACE] Network INTERFACE"
//usage: "\n %m Allocated memory"
//usage: "\n %[md] Dirty file-backed memory"
//usage: "\n %[mw] Memory being written to storage"
//usage: "\n %[mf] Free memory"
//usage: "\n %[mt] Total memory"
//usage: "\n %s Allocated swap"
@ -208,7 +210,7 @@ enum conv_type {
// Reads decimal values from line. Values start after key, for example:
// "cpu 649369 0 341297 4336769..." - key is "cpu" here.
// Values are stored in vec[].
// posbits is a bit lit of positions we are interested in.
// posbits is a bit list of positions we are interested in.
// for example: 00100110 - we want 1st, 2nd and 5th value.
// posbits.bit0 encodes conversion type.
static int rdval(const char* p, const char* key, ullong *vec, long posbits)
@ -661,13 +663,31 @@ S_STAT_END(mem_stat)
//Hugepagesize: 4096 kB
static void FAST_FUNC collect_mem(mem_stat *s)
{
ullong m_total = 0;
ullong m_free = 0;
ullong m_bufs = 0;
ullong m_cached = 0;
ullong m_slab = 0;
ullong m_total;
ullong m_free;
ullong m_bufs;
ullong m_cached;
ullong m_slab;
if (rdval(get_file(&proc_meminfo), "MemTotal:", &m_total, 1 << 1)) {
const char *meminfo = get_file(&proc_meminfo);
if (s->opt == 'd' /* dirty page cache */
|| s->opt == 'w' /* under writeback */
) {
m_total = 0; /* temporary reuse m_total */
if (rdval(meminfo,
(s->opt == 'd' ? "Dirty:" : "Writeback:"),
&m_total, 1 << 1)
) {
put_question_marks(4);
return;
}
scale(m_total << 10);
return;
}
m_total = 0;
if (rdval(meminfo, "MemTotal:", &m_total, 1 << 1)) {
put_question_marks(4);
return;
}
@ -676,10 +696,14 @@ static void FAST_FUNC collect_mem(mem_stat *s)
return;
}
if (rdval(proc_meminfo.file, "MemFree:", &m_free , 1 << 1)
|| rdval(proc_meminfo.file, "Buffers:", &m_bufs , 1 << 1)
|| rdval(proc_meminfo.file, "Cached:", &m_cached, 1 << 1)
|| rdval(proc_meminfo.file, "Slab:", &m_slab , 1 << 1)
m_free = 0;
m_bufs = 0;
m_cached = 0;
m_slab = 0;
if (rdval(meminfo, "MemFree:", &m_free , 1 << 1)
|| rdval(meminfo, "Buffers:", &m_bufs , 1 << 1)
|| rdval(meminfo, "Cached:", &m_cached, 1 << 1)
|| rdval(meminfo, "Slab:", &m_slab , 1 << 1)
) {
put_question_marks(4);
return;