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First try to implement proportional set size by recyling

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glibtop_proc_mem's duplicate members.x
Currently implemented on linux in rss member, for now
size,share,resident,rss are the only filled members.

svn path=/trunk/; revision=2740
This commit is contained in:
Benoît Dejean
2008-04-21 18:59:25 +00:00
parent cd950bbf73
commit 4d78d26932
1 changed files with 68 additions and 17 deletions
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85
sysdeps/linux/procmem.c
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@@ -27,21 +27,53 @@
#include "glibtop_private.h"
static const unsigned long _glibtop_sysdeps_proc_mem =
(1L << GLIBTOP_PROC_MEM_VSIZE) + (1L << GLIBTOP_PROC_MEM_RSS) +
(1L << GLIBTOP_PROC_MEM_RSS_RLIM);
static const unsigned long _glibtop_sysdeps_proc_mem_statm =
(1L << GLIBTOP_PROC_MEM_SIZE) + (1L << GLIBTOP_PROC_MEM_RESIDENT) +
(1L << GLIBTOP_PROC_MEM_SHARE);
static const unsigned long _glibtop_sysdeps_proc_mem_pss =
(1L << GLIBTOP_PROC_MEM_RSS);
static unsigned long
get_pss(glibtop* server, pid_t pid)
{
char filepath[128];
FILE* smaps;
char* line = NULL;
size_t line_size = 0;
unsigned long pss = 0;
snprintf(filepath, sizeof filepath, "/proc/%u/smaps", (unsigned)pid);
if (!(smaps = fopen(filepath, "r"))) {
glibtop_error_io_r(server, "Cannot open %s", filepath);
goto out;
}
while (getline(&line, &line_size, smaps) != -1) {
if (strncmp(line, "Pss:", 4))
continue;
pss += get_scaled(line + 4, NULL);
}
out:
if (smaps)
fclose(smaps);
free(line);
return pss;
}
/* Init function. */
void
_glibtop_init_proc_mem_s (glibtop *server)
{
server->sysdeps.proc_mem = _glibtop_sysdeps_proc_mem |
_glibtop_sysdeps_proc_mem_statm;
server->sysdeps.proc_mem = _glibtop_sysdeps_proc_mem;
if (server->os_version_code >= LINUX_VERSION_CODE(2, 6, 25))
server->sysdeps.proc_mem |= _glibtop_sysdeps_proc_mem_pss;
}
/* Provides detailed information about a process. */
@@ -54,19 +86,34 @@ glibtop_get_proc_mem_s (glibtop *server, glibtop_proc_mem *buf, pid_t pid)
memset (buf, 0, sizeof (glibtop_proc_mem));
if (proc_stat_to_buffer(buffer, sizeof buffer, pid))
return;
/* As of 2.6.24 in fs/proc/*.c
p = proc_stat_after_cmd (buffer);
if (!p) return;
== rss vs. resident ==
p = skip_multiple_token (p, 20);
stat/rss:
get_mm_rss where
#define get_mm_rss(mm) \
(get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss))
buf->vsize = strtoull (p, &p, 0);
buf->rss = strtoull (p, &p, 0);
buf->rss_rlim = strtoull (p, &p, 0);
statm/resident:
*shared = get_mm_counter(mm, file_rss);
*resident = *shared + get_mm_counter(mm, anon_rss);
buf->flags = _glibtop_sysdeps_proc_mem;
== vsize vs. size ==
stat/vsize:
task_vsize(mm) ... total_vm * pagesize
statm/size
mm->total_vm
=================
rss == resident
vsize == size
rss_lim is not implemented in statm, but there's limits which
provides all limits
share is only implemented in statm
*/
if (proc_statm_to_buffer(buffer, sizeof buffer, pid))
return;
@@ -78,7 +125,11 @@ glibtop_get_proc_mem_s (glibtop *server, glibtop_proc_mem *buf, pid_t pid)
buf->size *= pagesize;
buf->resident *= pagesize;
buf->share *= pagesize;
buf->rss *= pagesize;
buf->flags |= _glibtop_sysdeps_proc_mem_statm;
buf->flags |= _glibtop_sysdeps_proc_mem;
if (server->os_version_code >= LINUX_VERSION_CODE(2, 6, 25)) {
buf->rss = get_pss(server, pid);
buf->flags |= _glibtop_sysdeps_proc_mem_pss;
}
}