* Big kernel dynamic memory usage (non-cache)
@ 2013-01-22 1:50 Hubert Kario
2013-01-23 10:50 ` Hubert Kario
0 siblings, 1 reply; 2+ messages in thread
From: Hubert Kario @ 2013-01-22 1:50 UTC (permalink / raw)
To: linux-mm
Hi!
In short, how to get detailed information what is the "noncache" column in
"kernel dynamic memory" in smem -w output?
# smem -wtk
Area Used Cache Noncache
firmware/hardware 0 0 0
kernel image 0 0 0
kernel dynamic memory 1.5G 637.7M 853.5M
userspace memory 2.0G 142.7M 1.9G
free memory 383.5M 383.5M 0
----------------------------------------------------------
3.9G 1.1G 2.7G
Little background info:
I'm experiencing a weird problem with the kernel, where it does allocate
lots of memory, but I can't find what it is used for.
After the system has been running for few days (around a week usually) it
starts to swap quite heavily (if I don't close the biggest applications
quickly to recover I usually have to reset it as even remote ssh access
doesn't work, it responds to pings so it's not a hard lock up, Magic SysRq
doesn't restart it though). Thing is, it's enough to log-out from the X
environment and back in to make it go back to normal (where the noncache
memory is less than 200MiB).
It's a workstation, with KMail, Opera and the usual background KDE services
running in the back (with file indexing turned off). Any other processes
are either short lived or not using any big amounts (>5MiB) of memory.
Archlinux, so the packages (both kernel and userspace) are either vanilla or
with minimal patches.
The sum of USS of all processes in the system, as reported by smem
(the sum of RSS from `ps` is only 10-15% larger), during all that time oscillates
around 2GiB and basically never reaches 3GiB. I have tried running with zram
and it made the situation a bit better, but it sometimes still locks up
(because it starts swapping so hard).
As restarting X helps, it led me to believe it may be a regression from this
bug: https://bugzilla.redhat.com/show_bug.cgi?id=615505
but it doesn't look like it to me:
# cat /sys/kernel/debug/dri/0/gem_names
name size handles refcount
1 7680000 1 3
2 15564800 1 3
Some statistics and information on the system follow.
Regards,
Hubert Kario
# uname -a
Linux bursa22 3.6.11-1-ARCH #1 SMP PREEMPT Tue Dec 18 08:57:15 CET 2012 x86_64 GNU/Linux
# free -k
total used free shared buffers cached
Mem: 4051956 3598176 453780 0 30264 646828
-/+ buffers/cache: 2921084 1130872
Swap: 4051952 292524 3759428
# lsmod
Module Size Used by
vboxdrv 1823470 0
iptable_filter 1457 1
iptable_mangle 1585 1
xt_tcpudp 2472 14
xt_connmark 1910 12
xt_mark 1214 13
iptable_nat 4025 1
nf_nat 15371 1 iptable_nat
nf_conntrack_ipv4 7799 15 nf_nat,iptable_nat
nf_defrag_ipv4 1340 1 nf_conntrack_ipv4
nf_conntrack 64101 4 nf_nat,xt_connmark,iptable_nat,nf_conntrack_ipv4
ip_tables 16947 3 iptable_filter,iptable_mangle,iptable_nat
x_tables 17000 7 xt_mark,ip_tables,xt_tcpudp,iptable_filter,xt_connmark,iptable_mangle,iptable_nat
tun 16593 2
zram 9460 2
xfs 748208 1
snd_hda_codec_hdmi 24529 1
fuse 69213 5
btrfs 718583 2
coretemp 6071 0
kvm_intel 124718 0
crc32c 1769 1
libcrc32c 1003 1 btrfs
zlib_deflate 20437 1 btrfs
kvm 374014 1 kvm_intel
radeon 859687 2
iTCO_wdt 5256 0
iTCO_vendor_support 1930 1 iTCO_wdt
gpio_ich 4064 0
snd_hda_codec_realtek 61420 1
ttm 64385 1 radeon
drm_kms_helper 32878 1 radeon
drm 218903 4 ttm,drm_kms_helper,radeon
r8169 56872 0
i2c_algo_bit 5392 1 radeon
snd_hda_intel 26181 4
mii 4092 1 r8169
snd_hda_codec 98034 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
snd_hwdep 6429 1 snd_hda_codec
snd_pcm 75735 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_page_alloc 7218 2 snd_pcm,snd_hda_intel
snd_timer 18935 1 snd_pcm
acpi_cpufreq 5934 0
snd 60189 15 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec,snd_hda_intel
mperf 1300 1 acpi_cpufreq
intel_agp 10745 0
i2c_i801 9572 0
soundcore 5443 1 snd
intel_gtt 15660 1 intel_agp
microcode 12346 0
i2c_core 20708 5 drm,i2c_i801,drm_kms_helper,i2c_algo_bit,radeon
lpc_ich 10610 0
pcspkr 1900 0
processor 26856 3 acpi_cpufreq
button 4663 0
evdev 10267 7
ext4 440435 4
crc16 1360 1 ext4
jbd2 78802 1 ext4
mbcache 6027 1 ext4
dm_mod 72106 25
raid456 55308 1
async_raid6_recov 5375 1 raid456
async_memcpy 1367 2 raid456,async_raid6_recov
async_pq 3261 2 raid456,async_raid6_recov
async_xor 2394 3 async_pq,raid456,async_raid6_recov
xor 8866 1 async_xor
async_tx 1903 5 async_pq,raid456,async_xor,async_memcpy,async_raid6_recov
raid6_pq 86983 2 async_pq,async_raid6_recov
raid10 40365 1
md_mod 104017 3 raid456,raid10
hid_generic 1114 0
usbhid 37036 0
hid 85974 2 hid_generic,usbhid
sr_mod 14824 0
cdrom 35521 1 sr_mod
sd_mod 29560 27
ata_generic 3339 0
uhci_hcd 23437 0
pata_acpi 3452 0
sata_via 8124 5
ahci 21361 12
libahci 20024 1 ahci
pata_it8213 3587 1
firewire_ohci 31942 0
libata 167757 6 ahci,pata_acpi,sata_via,libahci,ata_generic,pata_it8213
scsi_mod 133434 3 libata,sd_mod,sr_mod
firewire_core 53174 1 firewire_ohci
crc_itu_t 1364 1 firewire_core
ehci_hcd 41849 0
usbcore 150472 3 uhci_hcd,ehci_hcd,usbhid
usb_common 955 1 usbcore
# smem -kt | sed -n '1p;$p'
PID User Command Swap USS PSS RSS
110 6 281.6M 2.0G 2.0G 2.3G
# cat /proc/meminfo
MemTotal: 4051956 kB
MemFree: 452512 kB
Buffers: 29784 kB
Cached: 648796 kB
SwapCached: 144308 kB
Active: 1555176 kB
Inactive: 1175416 kB
Active(anon): 1238968 kB
Inactive(anon): 868836 kB
Active(file): 316208 kB
Inactive(file): 306580 kB
Unevictable: 7720 kB
Mlocked: 7720 kB
SwapTotal: 4051952 kB
SwapFree: 3759416 kB
Dirty: 372 kB
Writeback: 0 kB
AnonPages: 1982576 kB
Mapped: 148724 kB
Shmem: 52248 kB
Slab: 185580 kB
SReclaimable: 69316 kB
SUnreclaim: 116264 kB
KernelStack: 3320 kB
PageTables: 43996 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 6077928 kB
Committed_AS: 3751688 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 139780 kB
VmallocChunk: 34359570976 kB
HardwareCorrupted: 0 kB
AnonHugePages: 442368 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 2536128 kB
DirectMap2M: 1656832 kB
# cat /proc/vmstat
nr_free_pages 113256
nr_inactive_anon 217210
nr_active_anon 309694
nr_inactive_file 76546
nr_active_file 79049
nr_unevictable 1930
nr_mlock 1930
nr_anon_pages 385048
nr_mapped 37179
nr_file_pages 205623
nr_dirty 24
nr_writeback 0
nr_slab_reclaimable 17329
nr_slab_unreclaimable 29066
nr_page_table_pages 10973
nr_kernel_stack 413
nr_unstable 0
nr_bounce 0
nr_vmscan_write 3103053
nr_vmscan_immediate_reclaim 21226934
nr_writeback_temp 0
nr_isolated_anon 0
nr_isolated_file 0
nr_shmem 13062
nr_dirtied 39768555
nr_written 38668348
numa_hit 1043570022
numa_miss 0
numa_foreign 0
numa_interleave 7629
numa_local 1043570022
numa_other 0
nr_anon_transparent_hugepages 216
nr_dirty_threshold 76584
nr_dirty_background_threshold 38292
pgpgin 538657436
pgpgout 172521740
pswpin 350320
pswpout 404062
pgalloc_dma 2
pgalloc_dma32 666912295
pgalloc_normal 571432892
pgalloc_movable 0
pgfree 1243823469
pgactivate 73410706
pgdeactivate 72896276
pgfault 544723643
pgmajfault 2023827
pgrefill_dma 0
pgrefill_dma32 64507672
pgrefill_normal 18650343
pgrefill_movable 0
pgsteal_kswapd_dma 0
pgsteal_kswapd_dma32 3005794
pgsteal_kswapd_normal 26891312
pgsteal_kswapd_movable 0
pgsteal_direct_dma 0
pgsteal_direct_dma32 15653023
pgsteal_direct_normal 42635574
pgsteal_direct_movable 0
pgscan_kswapd_dma 0
pgscan_kswapd_dma32 3136881
pgscan_kswapd_normal 32518914
pgscan_kswapd_movable 0
pgscan_direct_dma 0
pgscan_direct_dma32 361983838
pgscan_direct_normal 6556538987
pgscan_direct_movable 0
pgscan_direct_throttle 0
zone_reclaim_failed 0
pginodesteal 24512
slabs_scanned 35039616
kswapd_inodesteal 193648
kswapd_low_wmark_hit_quickly 654504
kswapd_high_wmark_hit_quickly 690974
kswapd_skip_congestion_wait 2977
pageoutrun 645618572
allocstall 7647697
pgrotated 285215
compact_blocks_moved 23846881
compact_pages_moved 4897380
compact_pagemigrate_failed 48162348
compact_stall 145117
compact_fail 138243
compact_success 6874
htlb_buddy_alloc_success 0
htlb_buddy_alloc_fail 0
unevictable_pgs_culled 8443
unevictable_pgs_scanned 0
unevictable_pgs_rescued 7075596
unevictable_pgs_mlocked 7082893
unevictable_pgs_munlocked 7076462
unevictable_pgs_cleared 0
unevictable_pgs_stranded 0
unevictable_pgs_mlockfreed 0
thp_fault_alloc 15563
thp_fault_fallback 59524
thp_collapse_alloc 1356
thp_collapse_alloc_failed 4821
thp_split 513
# cat /proc/swaps
Filename Type Size Used Priority
/dev/zram0 partition 2025976 146416 100
/dev/zram1 partition 2025976 146108 100
# cat /sys/block/zram*/compr_data_size
47152674
47090766
--
Hubert Kario
--
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Big kernel dynamic memory usage (non-cache)
2013-01-22 1:50 Big kernel dynamic memory usage (non-cache) Hubert Kario
@ 2013-01-23 10:50 ` Hubert Kario
0 siblings, 0 replies; 2+ messages in thread
From: Hubert Kario @ 2013-01-23 10:50 UTC (permalink / raw)
To: linux-mm
Anyone?
Is this not the correct mailing list for this problem?
If yes, are there any tools to help diagnose it? Where should I begin?
I can reproduce this problem regularly, but it takes quite a bit of time, so
I don't expect other people to diagnose and fix it.
Regards,
Hubert
On Tuesday 22 of January 2013 02:50:40 Hubert Kario wrote:
> Hi!
>
> In short, how to get detailed information what is the "noncache" column in
> "kernel dynamic memory" in smem -w output?
>
> # smem -wtk
> Area Used Cache Noncache
> firmware/hardware 0 0 0
> kernel image 0 0 0
> kernel dynamic memory 1.5G 637.7M 853.5M
> userspace memory 2.0G 142.7M 1.9G
> free memory 383.5M 383.5M 0
> ----------------------------------------------------------
> 3.9G 1.1G 2.7G
>
> Little background info:
>
> I'm experiencing a weird problem with the kernel, where it does allocate
> lots of memory, but I can't find what it is used for.
> After the system has been running for few days (around a week usually) it
> starts to swap quite heavily (if I don't close the biggest applications
> quickly to recover I usually have to reset it as even remote ssh access
> doesn't work, it responds to pings so it's not a hard lock up, Magic SysRq
> doesn't restart it though). Thing is, it's enough to log-out from the X
> environment and back in to make it go back to normal (where the noncache
> memory is less than 200MiB).
>
> It's a workstation, with KMail, Opera and the usual background KDE
> services running in the back (with file indexing turned off). Any other
> processes are either short lived or not using any big amounts (>5MiB) of
> memory. Archlinux, so the packages (both kernel and userspace) are either
> vanilla or with minimal patches.
>
> The sum of USS of all processes in the system, as reported by smem
> (the sum of RSS from `ps` is only 10-15% larger), during all that time
> oscillates around 2GiB and basically never reaches 3GiB. I have tried
> running with zram and it made the situation a bit better, but it
> sometimes still locks up (because it starts swapping so hard).
>
> As restarting X helps, it led me to believe it may be a regression from
> this bug: https://bugzilla.redhat.com/show_bug.cgi?id=615505
> but it doesn't look like it to me:
>
> # cat /sys/kernel/debug/dri/0/gem_names
> name size handles refcount
> 1 7680000 1 3
> 2 15564800 1 3
>
> Some statistics and information on the system follow.
>
> Regards,
> Hubert Kario
>
> # uname -a
> Linux bursa22 3.6.11-1-ARCH #1 SMP PREEMPT Tue Dec 18 08:57:15 CET 2012
> x86_64 GNU/Linux
>
> # free -k
> total used free shared buffers cached
> Mem: 4051956 3598176 453780 0 30264 646828
> -/+ buffers/cache: 2921084 1130872
> Swap: 4051952 292524 3759428
>
> # lsmod
> Module Size Used by
> vboxdrv 1823470 0
> iptable_filter 1457 1
> iptable_mangle 1585 1
> xt_tcpudp 2472 14
> xt_connmark 1910 12
> xt_mark 1214 13
> iptable_nat 4025 1
> nf_nat 15371 1 iptable_nat
> nf_conntrack_ipv4 7799 15 nf_nat,iptable_nat
> nf_defrag_ipv4 1340 1 nf_conntrack_ipv4
> nf_conntrack 64101 4
> nf_nat,xt_connmark,iptable_nat,nf_conntrack_ipv4 ip_tables
> 16947 3 iptable_filter,iptable_mangle,iptable_nat x_tables
> 17000 7
> xt_mark,ip_tables,xt_tcpudp,iptable_filter,xt_connmark,iptable_mangle,ipt
> able_nat tun 16593 2
> zram 9460 2
> xfs 748208 1
> snd_hda_codec_hdmi 24529 1
> fuse 69213 5
> btrfs 718583 2
> coretemp 6071 0
> kvm_intel 124718 0
> crc32c 1769 1
> libcrc32c 1003 1 btrfs
> zlib_deflate 20437 1 btrfs
> kvm 374014 1 kvm_intel
> radeon 859687 2
> iTCO_wdt 5256 0
> iTCO_vendor_support 1930 1 iTCO_wdt
> gpio_ich 4064 0
> snd_hda_codec_realtek 61420 1
> ttm 64385 1 radeon
> drm_kms_helper 32878 1 radeon
> drm 218903 4 ttm,drm_kms_helper,radeon
> r8169 56872 0
> i2c_algo_bit 5392 1 radeon
> snd_hda_intel 26181 4
> mii 4092 1 r8169
> snd_hda_codec 98034 3
> snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel snd_hwdep
> 6429 1 snd_hda_codec
> snd_pcm 75735 3
> snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel snd_page_alloc
> 7218 2 snd_pcm,snd_hda_intel
> snd_timer 18935 1 snd_pcm
> acpi_cpufreq 5934 0
> snd 60189 15
> snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_
> hda_codec,snd_hda_intel mperf 1300 1 acpi_cpufreq
> intel_agp 10745 0
> i2c_i801 9572 0
> soundcore 5443 1 snd
> intel_gtt 15660 1 intel_agp
> microcode 12346 0
> i2c_core 20708 5
> drm,i2c_i801,drm_kms_helper,i2c_algo_bit,radeon lpc_ich
> 10610 0
> pcspkr 1900 0
> processor 26856 3 acpi_cpufreq
> button 4663 0
> evdev 10267 7
> ext4 440435 4
> crc16 1360 1 ext4
> jbd2 78802 1 ext4
> mbcache 6027 1 ext4
> dm_mod 72106 25
> raid456 55308 1
> async_raid6_recov 5375 1 raid456
> async_memcpy 1367 2 raid456,async_raid6_recov
> async_pq 3261 2 raid456,async_raid6_recov
> async_xor 2394 3 async_pq,raid456,async_raid6_recov
> xor 8866 1 async_xor
> async_tx 1903 5
> async_pq,raid456,async_xor,async_memcpy,async_raid6_recov raid6_pq
> 86983 2 async_pq,async_raid6_recov
> raid10 40365 1
> md_mod 104017 3 raid456,raid10
> hid_generic 1114 0
> usbhid 37036 0
> hid 85974 2 hid_generic,usbhid
> sr_mod 14824 0
> cdrom 35521 1 sr_mod
> sd_mod 29560 27
> ata_generic 3339 0
> uhci_hcd 23437 0
> pata_acpi 3452 0
> sata_via 8124 5
> ahci 21361 12
> libahci 20024 1 ahci
> pata_it8213 3587 1
> firewire_ohci 31942 0
> libata 167757 6
> ahci,pata_acpi,sata_via,libahci,ata_generic,pata_it8213 scsi_mod
> 133434 3 libata,sd_mod,sr_mod
> firewire_core 53174 1 firewire_ohci
> crc_itu_t 1364 1 firewire_core
> ehci_hcd 41849 0
> usbcore 150472 3 uhci_hcd,ehci_hcd,usbhid
> usb_common 955 1 usbcore
>
> # smem -kt | sed -n '1p;$p'
> PID User Command Swap USS PSS
> RSS 110 6 281.6M 2.0G 2.0G
> 2.3G
>
> # cat /proc/meminfo
> MemTotal: 4051956 kB
> MemFree: 452512 kB
> Buffers: 29784 kB
> Cached: 648796 kB
> SwapCached: 144308 kB
> Active: 1555176 kB
> Inactive: 1175416 kB
> Active(anon): 1238968 kB
> Inactive(anon): 868836 kB
> Active(file): 316208 kB
> Inactive(file): 306580 kB
> Unevictable: 7720 kB
> Mlocked: 7720 kB
> SwapTotal: 4051952 kB
> SwapFree: 3759416 kB
> Dirty: 372 kB
> Writeback: 0 kB
> AnonPages: 1982576 kB
> Mapped: 148724 kB
> Shmem: 52248 kB
> Slab: 185580 kB
> SReclaimable: 69316 kB
> SUnreclaim: 116264 kB
> KernelStack: 3320 kB
> PageTables: 43996 kB
> NFS_Unstable: 0 kB
> Bounce: 0 kB
> WritebackTmp: 0 kB
> CommitLimit: 6077928 kB
> Committed_AS: 3751688 kB
> VmallocTotal: 34359738367 kB
> VmallocUsed: 139780 kB
> VmallocChunk: 34359570976 kB
> HardwareCorrupted: 0 kB
> AnonHugePages: 442368 kB
> HugePages_Total: 0
> HugePages_Free: 0
> HugePages_Rsvd: 0
> HugePages_Surp: 0
> Hugepagesize: 2048 kB
> DirectMap4k: 2536128 kB
> DirectMap2M: 1656832 kB
>
> # cat /proc/vmstat
> nr_free_pages 113256
> nr_inactive_anon 217210
> nr_active_anon 309694
> nr_inactive_file 76546
> nr_active_file 79049
> nr_unevictable 1930
> nr_mlock 1930
> nr_anon_pages 385048
> nr_mapped 37179
> nr_file_pages 205623
> nr_dirty 24
> nr_writeback 0
> nr_slab_reclaimable 17329
> nr_slab_unreclaimable 29066
> nr_page_table_pages 10973
> nr_kernel_stack 413
> nr_unstable 0
> nr_bounce 0
> nr_vmscan_write 3103053
> nr_vmscan_immediate_reclaim 21226934
> nr_writeback_temp 0
> nr_isolated_anon 0
> nr_isolated_file 0
> nr_shmem 13062
> nr_dirtied 39768555
> nr_written 38668348
> numa_hit 1043570022
> numa_miss 0
> numa_foreign 0
> numa_interleave 7629
> numa_local 1043570022
> numa_other 0
> nr_anon_transparent_hugepages 216
> nr_dirty_threshold 76584
> nr_dirty_background_threshold 38292
> pgpgin 538657436
> pgpgout 172521740
> pswpin 350320
> pswpout 404062
> pgalloc_dma 2
> pgalloc_dma32 666912295
> pgalloc_normal 571432892
> pgalloc_movable 0
> pgfree 1243823469
> pgactivate 73410706
> pgdeactivate 72896276
> pgfault 544723643
> pgmajfault 2023827
> pgrefill_dma 0
> pgrefill_dma32 64507672
> pgrefill_normal 18650343
> pgrefill_movable 0
> pgsteal_kswapd_dma 0
> pgsteal_kswapd_dma32 3005794
> pgsteal_kswapd_normal 26891312
> pgsteal_kswapd_movable 0
> pgsteal_direct_dma 0
> pgsteal_direct_dma32 15653023
> pgsteal_direct_normal 42635574
> pgsteal_direct_movable 0
> pgscan_kswapd_dma 0
> pgscan_kswapd_dma32 3136881
> pgscan_kswapd_normal 32518914
> pgscan_kswapd_movable 0
> pgscan_direct_dma 0
> pgscan_direct_dma32 361983838
> pgscan_direct_normal 6556538987
> pgscan_direct_movable 0
> pgscan_direct_throttle 0
> zone_reclaim_failed 0
> pginodesteal 24512
> slabs_scanned 35039616
> kswapd_inodesteal 193648
> kswapd_low_wmark_hit_quickly 654504
> kswapd_high_wmark_hit_quickly 690974
> kswapd_skip_congestion_wait 2977
> pageoutrun 645618572
> allocstall 7647697
> pgrotated 285215
> compact_blocks_moved 23846881
> compact_pages_moved 4897380
> compact_pagemigrate_failed 48162348
> compact_stall 145117
> compact_fail 138243
> compact_success 6874
> htlb_buddy_alloc_success 0
> htlb_buddy_alloc_fail 0
> unevictable_pgs_culled 8443
> unevictable_pgs_scanned 0
> unevictable_pgs_rescued 7075596
> unevictable_pgs_mlocked 7082893
> unevictable_pgs_munlocked 7076462
> unevictable_pgs_cleared 0
> unevictable_pgs_stranded 0
> unevictable_pgs_mlockfreed 0
> thp_fault_alloc 15563
> thp_fault_fallback 59524
> thp_collapse_alloc 1356
> thp_collapse_alloc_failed 4821
> thp_split 513
>
> # cat /proc/swaps
> Filename Type Size Used
> Priority /dev/zram0 partition 2025976
> 146416 100 /dev/zram1 partition
> 2025976 146108 100
>
> # cat /sys/block/zram*/compr_data_size
> 47152674
> 47090766
--
Hubert Kario
--
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^ permalink raw reply [flat|nested] 2+ messages in thread
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2013-01-22 1:50 Big kernel dynamic memory usage (non-cache) Hubert Kario
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