Loss of several MB of run-time memory
Patrick Venture
venture at google.com
Wed Oct 10 04:06:38 AEDT 2018
On Tue, Oct 9, 2018 at 10:01 AM Tanous, Ed <ed.tanous at intel.com> wrote:
>
> Was this only the kernel version jump, or did you jump in openbmc/phosphor levels as well? There have been quite a few daemons added in the last 6 months or so that could explain your memory footprint increase.
So, I did also jump phosphor versions, but my running process list is
nearly identical to what it was, so I don't expect to lose
substantially more memory from just this.
ps -eaf
UID PID PPID C STIME TTY TIME CMD
root 1 0 1 14:44 ? 00:00:21 /sbin/init
root 2 0 0 14:44 ? 00:00:00 [kthreadd]
root 4 2 0 14:44 ? 00:00:00 [kworker/0:0H-kb]
root 6 2 0 14:44 ? 00:00:00 [mm_percpu_wq]
root 7 2 0 14:44 ? 00:00:03 [ksoftirqd/0]
root 8 2 0 14:44 ? 00:00:00 [watchdog/0]
root 9 2 0 14:44 ? 00:00:00 [kdevtmpfs]
root 10 2 0 14:44 ? 00:00:00 [oom_reaper]
root 71 2 0 14:44 ? 00:00:00 [kworker/u2:2-ev]
root 171 2 0 14:44 ? 00:00:00 [writeback]
root 173 2 0 14:44 ? 00:00:00 [crypto]
root 175 2 0 14:44 ? 00:00:00 [kblockd]
root 194 2 0 14:44 ? 00:00:00 [watchdogd]
root 200 2 0 14:44 ? 00:00:05 [kworker/0:1-eve]
root 220 2 0 14:44 ? 00:00:00 [kswapd0]
root 269 2 0 14:44 ? 00:00:00 [hwrng]
root 508 2 0 14:44 ? 00:00:00 [ipv6_addrconf]
root 538 2 0 14:44 ? 00:00:00 [kworker/0:1H-kb]
root 566 2 0 14:44 ? 00:00:00 [jffs2_gcd_mtd5]
root 684 1 0 14:44 ? 00:00:17 /lib/systemd/systemd-journald
root 704 1 0 14:44 ? 00:00:01 /lib/systemd/systemd-udevd
systemd+ 927 1 0 14:44 ? 00:00:01 /lib/systemd/systemd-timesyncd
systemd+ 965 1 0 14:44 ? 00:00:01 /lib/systemd/systemd-resolved
root 969 1 0 14:44 ? 00:00:02 /usr/sbin/rsyslogd -n
root 970 1 0 14:44 ttyS5 00:00:02 obmc-console-server
--config /etc/obmc-console.conf ttyVUART0
message+ 974 1 5 14:44 ? 00:01:46 /usr/bin/dbus-daemon
--system --address=systemd: --nofork --nopidfile --systemd-activation
--syslog-only
root 982 1 0 14:44 ? 00:00:14 btbridged
root 983 1 0 14:44 ? 00:00:01 /bin/bash
/usr/sbin/set_gateway_arp.sh eth1
root 984 1 0 14:44 ? 00:00:00 /usr/sbin/snoopd -d
/dev/aspeed-lpc-snoop0 -b 1
root 985 1 0 14:44 ? 00:00:00 phosphor-log-manager
root 986 1 0 14:44 ? 00:00:00 phosphor-settings-manager
root 987 1 0 14:44 ? 00:00:00 phosphor-rsyslog-conf
root 989 1 2 14:44 ? 00:00:47 python
/usr/sbin/phosphor-mapper --path_namespaces=/org/openbmc
/xyz/openbmc_project --interface_namespaces=xyz.openbmc_project
org.openbmc --blacklists= --
root 990 1 0 14:44 ? 00:00:02 phosphor-watchdog
--service=xyz.openbmc_project.Watchdog
--path=/xyz/openbmc_project/watchdog/host0
--target=iceblink-reset.target --continue
root 991 1 0 14:44 ? 00:00:00 /usr/sbin/rngd -f
root 993 1 0 14:44 ? 00:00:01 phosphor-inventory
avahi 994 1 0 14:44 ? 00:00:01 avahi-daemon: running
[iceblink.local]
avahi 995 994 0 14:45 ? 00:00:00 avahi-daemon: chroot helper
root 998 1 1 14:45 ? 00:00:28 ipmid
root 1000 1 0 14:45 ? 00:00:00 slpd
root 1001 1 0 14:45 ttyS4 00:00:00 /bin/login --
root 1005 1 0 14:45 ? 00:00:00 phosphor-hwmon-readd
-o /iio-hwmon-battery
root 1008 1 0 14:45 ? 00:00:02 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 80/tmp75 at 4c
root 1016 1 0 14:45 ? 00:00:00 phosphor-network-manager
root 1017 1 0 14:45 ? 00:00:00 phosphor-dbus-monitor
root 1021 1 0 14:45 ? 00:00:00 phosphor-network-snmpconf
root 1024 1 0 14:45 ? 00:00:00 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 300/i2c-switch at 70/i2c at 0/psu at 59
root 1025 1 0 14:45 ? 00:00:02 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 80/tmp75 at 4f
root 1026 1 0 14:45 ? 00:00:00 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 300/i2c-switch at 70/i2c at 1/psu at 58
root 1027 1 0 14:45 ? 00:00:02 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 80/tmp75 at 4e
root 1028 1 0 14:45 ? 00:00:01 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 300/i2c-switch at 70/i2c at 2/psu at 58
root 1029 1 0 14:45 ? 00:00:16 phosphor-hwmon-readd
-o /ahb/apb/pwm-tacho-controller at 1e786000
root 1030 1 0 14:45 ? 00:00:00 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 300/i2c-switch at 70/i2c at 3/psu at 59
root 1034 1 1 14:45 ? 00:00:22 phosphor-hwmon-readd
-o /iio-hwmon
systemd+ 1046 1 0 14:45 ? 00:00:00 /lib/systemd/systemd-networkd
root 1057 1 0 14:45 ? 00:00:00 /usr/sbin/watchdog
root 1070 1 2 14:45 ? 00:00:56 /usr/sbin/swampd
root 1090 1001 0 14:46 ttyS4 00:00:00 -sh
root 1123 2 0 14:50 ? 00:00:00 [kworker/u2:0-ev]
root 1272 2 0 15:13 ? 00:00:00 [kworker/0:2-eve]
root 1304 983 1 15:18 ? 00:00:00 sleep 10
root 1305 1090 0 15:18 ttyS4 00:00:00 ps -eaf
>
> -Ed
>
>
>
> > On Oct 9, 2018, at 9:54 AM, Patrick Venture <venture at google.com> wrote:
> >
> > Just jumped from 4.7 kernel to 4.18 running the latest openbmc image
> > on the quanta-q71l board. And I see now I have ~20MiB of RAM free for
> > stuff once things are settled, whereas before I could have up to
> > 35MiB.
> >
> > Here are some dumps:
> >
> > Now:
> > [ 0.000000] CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=0005317f
> > [ 0.000000] CPU: VIVT data cache, VIVT instruction cache
> > [ 0.000000] OF: fdt: Machine model: Quanta Q71L BMC
> > [ 0.000000] Memory policy: Data cache writeback
> > [ 0.000000] On node 0 totalpages: 30720
> > [ 0.000000] Normal zone: 240 pages used for memmap
> > [ 0.000000] Normal zone: 0 pages reserved
> > [ 0.000000] Normal zone: 30720 pages, LIFO batch:7
> > [ 0.000000] random: get_random_bytes called from
> > start_kernel+0x8c/0x4c0 with crng_init=0
> > [ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
> > [ 0.000000] pcpu-alloc: [0] 0
> > [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 30480
> > [ 0.000000] Kernel command line: console=ttyS4,115200n8
> > root=/dev/ram rw clk_ignore_unused
> > [ 0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
> > [ 0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
> > [ 0.000000] Memory: 111076K/122880K available (5120K kernel code,
> > 365K rwdata, 1104K rodata, 1024K init, 143K bss, 11804K reserved, 0K
> > cma-reserved)
> > [ 0.000000] Virtual kernel memory layout:
> > [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
> > [ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
> > [ 0.000000] vmalloc : 0x88000000 - 0xff800000 (1912 MB)
> > [ 0.000000] lowmem : 0x80000000 - 0x87800000 ( 120 MB)
> > [ 0.000000] .text : 0x(ptrval) - 0x(ptrval) (6112 kB)
> > [ 0.000000] .init : 0x(ptrval) - 0x(ptrval) (1024 kB)
> > [ 0.000000] .data : 0x(ptrval) - 0x(ptrval) ( 366 kB)
> > [ 0.000000] .bss : 0x(ptrval) - 0x(ptrval) ( 144 kB)
> > [ 0.000000] ftrace: allocating 18546 entries in 55 pages
> >
> > cat /proc/meminfo
> > MemTotal: 113952 kB
> > MemFree: 19944 kB
> > MemAvailable: 62432 kB
> > Buffers: 11032 kB
> > Cached: 48732 kB
> > SwapCached: 0 kB
> > Active: 40940 kB
> > Inactive: 26728 kB
> > Active(anon): 17068 kB
> > Inactive(anon): 9316 kB
> > Active(file): 23872 kB
> > Inactive(file): 17412 kB
> > Unevictable: 9088 kB
> > Mlocked: 0 kB
> > SwapTotal: 0 kB
> > SwapFree: 0 kB
> > Dirty: 0 kB
> > Writeback: 0 kB
> > AnonPages: 17008 kB
> > Mapped: 21120 kB
> > Shmem: 9392 kB
> > Slab: 11956 kB
> > SReclaimable: 6472 kB
> > SUnreclaim: 5484 kB
> > KernelStack: 560 kB
> > PageTables: 1384 kB
> > NFS_Unstable: 0 kB
> > Bounce: 0 kB
> > WritebackTmp: 0 kB
> > CommitLimit: 56976 kB
> > Committed_AS: 124224 kB
> > VmallocTotal: 1957888 kB
> > VmallocUsed: 0 kB
> > VmallocChunk: 0 kB
> >
> > Before:
> > dmesg
> > Normal zone: 30720 pages, LIFO batch:7
> > pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
> > pcpu-alloc: [0] 0
> > Built 1 zonelists in Zone order, mobility grouping on. Total pages: 30480
> > Kernel command line: console=ttyS4,115200n8 root=/dev/ram rw
> > PID hash table entries: 512 (order: -1, 2048 bytes)
> > Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
> > Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
> > Memory: 113644K/122880K available (4206K kernel code, 150K rwdata,
> > 860K rodata, 1024K init, 111K bss, 9236K reserved, 0K cma-reserved)
> > Virtual kernel memory layout:
> > vector : 0xffff0000 - 0xffff1000 ( 4 kB)
> > fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
> > vmalloc : 0xc8000000 - 0xff800000 ( 888 MB)
> > lowmem : 0xc0000000 - 0xc7800000 ( 120 MB)
> > .text : 0xc0008000 - 0xc05f28ec (6059 kB)
> > .init : 0xc0600000 - 0xc0700000 (1024 kB)
> > .data : 0xc0700000 - 0xc0725be8 ( 151 kB)
> > .bss : 0xc0725be8 - 0xc0741a38 ( 112 kB)
> >
> > cat /proc/meminfo
> > MemTotal: 116224 kB
> > MemFree: 35832 kB
> > MemAvailable: 76952 kB
> > Buffers: 9596 kB
> > Cached: 39776 kB
> > SwapCached: 0 kB
> > Active: 40516 kB
> > Inactive: 25432 kB
> > Active(anon): 17004 kB
> > Inactive(anon): 6968 kB
> > Active(file): 23512 kB
> > Inactive(file): 18464 kB
> > Unevictable: 0 kB
> > Mlocked: 0 kB
> > SwapTotal: 0 kB
> > SwapFree: 0 kB
> > Dirty: 0 kB
> > Writeback: 0 kB
> > AnonPages: 16588 kB
> > Mapped: 20064 kB
> > Shmem: 7396 kB
> > Slab: 9424 kB
> > SReclaimable: 4532 kB
> > SUnreclaim: 4892 kB
> > KernelStack: 720 kB
> > PageTables: 1328 kB
> > NFS_Unstable: 0 kB
> > Bounce: 0 kB
> > WritebackTmp: 0 kB
> > CommitLimit: 58112 kB
> > Committed_AS: 142324 kB
> > VmallocTotal: 909312 kB
> > VmallocUsed: 0 kB
> > VmallocChunk: 0 kB
> >
> > This matters for a few reasons:
> > 1) my memory chip is too small to be practical and I need all the
> > bytes I can get.
> > 2) I need at least 32MiB to load a new firmware image.
> >
> > I dropped all the python except the mapper, and I dropped the newer
> > daemons from my build to clear out that difference. It was originally
> > about 16MiB difference, so I was thinking that something is now being
> > mapped by default that wasn't before, such as part of a flash image.
> >
> > Patrick
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