christian-marie

// This is free and unencumbered software released into the public domain.

#include <sys/sysinfo.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>

christian-marie

#include <sys/sysinfo.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>

#include <stdlib.h>

christian-marie

diff -uNr kernel-3.10.0-123.el7/linux-3.10.0-123.el7.x86_64/include/trace/events/vmscan.h kernel-3.10.0-123.el7p/linux-3.10.0-123.el7.x86_64/include/trace/events/vmscan.h
--- a/include/trace/events/vmscan.h	2014-05-05 14:58:32.000000000 +0000
+++ b/include/trace/events/vmscan.h	2014-11-12 00:07:59.193842097 +0000
@@ -36,6 +36,25 @@
 		(RECLAIM_WB_ASYNC) \
 	)
 
+TRACE_EVENT(mm_vmscan_frob,
+
+	TP_PROTO(unsigned long  zonefile, unsigned long zonefree),

christian-marie

root@a006 ~ # cat /proc/buddyinfo                         
Node 0, zone      DMA      1      0      1      1      1      1      1      0      1      1      3 
Node 0, zone    DMA32    611    162  11718  13371   8910   3151    553    127     17      0      0 
Node 0, zone   Normal   8273    725 140722  98296  51919  30097  12783   3721    960      0      0 
Node 1, zone   Normal  44944  80907 149363 125764  68301  31908  12931   3584   1177      0      0 
root@a006 ~ # echo 1 > /proc/sys/vm/compact_memory
root@a006 ~ # cat /proc/buddyinfo                 
Node 0, zone      DMA      1      0      1      1      1      1      1      0      1      1      3 
Node 0, zone    DMA32    707    169  11721  13350   8910   3151    553    127     17      0      0 
Node 0, zone   Normal   9390    791 140727  98228  51902  30098  12783   3721    960      0      0 

christian-marie

root@a005 ~ # cat /proc/buddyinfo 
Node 0, zone      DMA      1      0      1      1      1      1      1      0      1      1      3 
Node 0, zone    DMA32   1343  10432  17643  15075   7721   2429    891    264     41      0      0 
Node 0, zone   Normal   8553 177548 171495  92449  55937  25275  10835   4712   1495      0      0 
Node 1, zone   Normal  33779 103158 190284  74350  37246  24498  14280   7306   1967    278      2 
root@a005 ~ # echo 3 > /proc/sys/vm/drop_caches    
root@a005 ~ # echo 1 > /proc/sys/vm/compact_memory
root@a005 ~ # cat /proc/buddyinfo                  
Node 0, zone      DMA      1      0      1      1      1      1      1      0      1      1      3 
Node 0, zone    DMA32  14261  16596  18636  14409   7362   2363   1040    358     89      0      0 

christian-marie

[3440039.787961] ib1: failed to allocate tx qp: -12
[3443189.780418] kworker/u97:2: page allocation failure: order:4, mode:0x1040d0
[3443189.780426] CPU: 22 PID: 1675 Comm: kworker/u97:2 Tainted: GF O-------------- 3.10.0-123.el7.x86_64 #1
[3443189.780428] Hardware name: Dell Inc. PowerEdge R720xd/0X3D66, BIOS 2.2.2 01/16/2014
[3443189.780444] Workqueue: ipoib ipoib_cm_tx_start [ib_ipoib]
[3443189.780447] 00000000001040d0 000000006f24d4f6 ffff88013342b840 ffffffff815e19ba
[3443189.780458] ffff88013342b8d0 ffffffff811472e0 000000000000000e 0000000000000000
[3443189.780462] ffff88083ffd9e80 ffff88083ffd9e80 ffff88013342b8a0 000000006f24d4f6
[3443189.780467] Call Trace:
[3443189.780478] [<ffffffff815e19ba>] dump_stack+0x19/0x1b

christian-marie

root@a005 ~ # xfs_info /var/lib/ceph/osd/ceph-87 
meta-data=/dev/sdj1              isize=2048   agcount=4, agsize=54902719 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=0
data     =                       bsize=4096   blocks=219610875, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
log      =internal               bsize=4096   blocks=107231, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

christian-marie

Node 0, zone      DMA -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 
Node 0, zone    DMA32 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 0.981 0.991 0.996 0.998 
Node 0, zone   Normal -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 0.990 0.995 0.998 0.999 
Node 1, zone   Normal -1.000 -1.000 -1.000 -1.000 0.937 0.969 0.985 0.993 0.996 0.998 0.999 

christian-marie

--
-- Copyright © 2013-2014 Anchor Systems, Pty Ltd and Others
--
-- The code in this file, and the program it is a part of, is
-- made available to you by its authors as open source software:
-- you can redistribute it and/or modify it under the terms of
-- the 3-clause BSD licence.
--

module Main where

christian-marie

static void *main_thread() {
        typedef struct {
                void *socket;
                timeval timeout;
                current_msg;
        }

        socket sockets[10];

        for( 0..10) {