forked from Minki/linux
1aae0560d1
Fix name clash with some common code device drivers and add "tod" to all tod clock access function names. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
154 lines
4.0 KiB
C
154 lines
4.0 KiB
C
/*
|
|
* Data gathering module for Linux-VM Monitor Stream, Stage 1.
|
|
* Collects data related to memory management.
|
|
*
|
|
* Copyright IBM Corp. 2003, 2006
|
|
*
|
|
* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/kernel_stat.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/swap.h>
|
|
#include <asm/io.h>
|
|
|
|
#include "appldata.h"
|
|
|
|
|
|
#define P2K(x) ((x) << (PAGE_SHIFT - 10)) /* Converts #Pages to KB */
|
|
|
|
/*
|
|
* Memory data
|
|
*
|
|
* This is accessed as binary data by z/VM. If changes to it can't be avoided,
|
|
* the structure version (product ID, see appldata_base.c) needs to be changed
|
|
* as well and all documentation and z/VM applications using it must be
|
|
* updated.
|
|
*
|
|
* The record layout is documented in the Linux for zSeries Device Drivers
|
|
* book:
|
|
* http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
|
|
*/
|
|
static struct appldata_mem_data {
|
|
u64 timestamp;
|
|
u32 sync_count_1; /* after VM collected the record data, */
|
|
u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the
|
|
same. If not, the record has been updated on
|
|
the Linux side while VM was collecting the
|
|
(possibly corrupt) data */
|
|
|
|
u64 pgpgin; /* data read from disk */
|
|
u64 pgpgout; /* data written to disk */
|
|
u64 pswpin; /* pages swapped in */
|
|
u64 pswpout; /* pages swapped out */
|
|
|
|
u64 sharedram; /* sharedram is currently set to 0 */
|
|
|
|
u64 totalram; /* total main memory size */
|
|
u64 freeram; /* free main memory size */
|
|
u64 totalhigh; /* total high memory size */
|
|
u64 freehigh; /* free high memory size */
|
|
|
|
u64 bufferram; /* memory reserved for buffers, free cache */
|
|
u64 cached; /* size of (used) cache, w/o buffers */
|
|
u64 totalswap; /* total swap space size */
|
|
u64 freeswap; /* free swap space */
|
|
|
|
// New in 2.6 -->
|
|
u64 pgalloc; /* page allocations */
|
|
u64 pgfault; /* page faults (major+minor) */
|
|
u64 pgmajfault; /* page faults (major only) */
|
|
// <-- New in 2.6
|
|
|
|
} __attribute__((packed)) appldata_mem_data;
|
|
|
|
|
|
/*
|
|
* appldata_get_mem_data()
|
|
*
|
|
* gather memory data
|
|
*/
|
|
static void appldata_get_mem_data(void *data)
|
|
{
|
|
/*
|
|
* don't put large structures on the stack, we are
|
|
* serialized through the appldata_ops_mutex and can use static
|
|
*/
|
|
static struct sysinfo val;
|
|
unsigned long ev[NR_VM_EVENT_ITEMS];
|
|
struct appldata_mem_data *mem_data;
|
|
|
|
mem_data = data;
|
|
mem_data->sync_count_1++;
|
|
|
|
all_vm_events(ev);
|
|
mem_data->pgpgin = ev[PGPGIN] >> 1;
|
|
mem_data->pgpgout = ev[PGPGOUT] >> 1;
|
|
mem_data->pswpin = ev[PSWPIN];
|
|
mem_data->pswpout = ev[PSWPOUT];
|
|
mem_data->pgalloc = ev[PGALLOC_NORMAL];
|
|
mem_data->pgalloc += ev[PGALLOC_DMA];
|
|
mem_data->pgfault = ev[PGFAULT];
|
|
mem_data->pgmajfault = ev[PGMAJFAULT];
|
|
|
|
si_meminfo(&val);
|
|
mem_data->sharedram = val.sharedram;
|
|
mem_data->totalram = P2K(val.totalram);
|
|
mem_data->freeram = P2K(val.freeram);
|
|
mem_data->totalhigh = P2K(val.totalhigh);
|
|
mem_data->freehigh = P2K(val.freehigh);
|
|
mem_data->bufferram = P2K(val.bufferram);
|
|
mem_data->cached = P2K(global_page_state(NR_FILE_PAGES)
|
|
- val.bufferram);
|
|
|
|
si_swapinfo(&val);
|
|
mem_data->totalswap = P2K(val.totalswap);
|
|
mem_data->freeswap = P2K(val.freeswap);
|
|
|
|
mem_data->timestamp = get_tod_clock();
|
|
mem_data->sync_count_2++;
|
|
}
|
|
|
|
|
|
static struct appldata_ops ops = {
|
|
.name = "mem",
|
|
.record_nr = APPLDATA_RECORD_MEM_ID,
|
|
.size = sizeof(struct appldata_mem_data),
|
|
.callback = &appldata_get_mem_data,
|
|
.data = &appldata_mem_data,
|
|
.owner = THIS_MODULE,
|
|
.mod_lvl = {0xF0, 0xF0}, /* EBCDIC "00" */
|
|
};
|
|
|
|
|
|
/*
|
|
* appldata_mem_init()
|
|
*
|
|
* init_data, register ops
|
|
*/
|
|
static int __init appldata_mem_init(void)
|
|
{
|
|
return appldata_register_ops(&ops);
|
|
}
|
|
|
|
/*
|
|
* appldata_mem_exit()
|
|
*
|
|
* unregister ops
|
|
*/
|
|
static void __exit appldata_mem_exit(void)
|
|
{
|
|
appldata_unregister_ops(&ops);
|
|
}
|
|
|
|
|
|
module_init(appldata_mem_init);
|
|
module_exit(appldata_mem_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Gerald Schaefer");
|
|
MODULE_DESCRIPTION("Linux-VM Monitor Stream, MEMORY statistics");
|