Loss of several MB of run-time memory
Patrick Venture
venture at google.com
Fri Oct 12 01:25:36 AEDT 2018
On Wed, Oct 10, 2018 at 9:17 AM Patrick Venture <venture at google.com> wrote:
>
> On Wed, Oct 10, 2018 at 8:31 AM Patrick Venture <venture at google.com> wrote:
> >
> > On Tue, Oct 9, 2018 at 3:25 PM Joel Stanley <joel at jms.id.au> wrote:
> > >
> > > On Wed, 10 Oct 2018 at 03:38, Kun Yi <kunyi at google.com> wrote:
> > > >
> > > > A somewhat tedious way to test would be to build and boot with 'bitbake core-image-minimal' to ensure no phosphor-daemons are loaded, and then compare the kernel memory footprint.
> > > >
> > > > 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.
> > >
> > > HI team. Just a reminder about email etiquette on the mailing lists
> > > that Brad posted a while back:
> > >
> > > https://fedoraproject.org/wiki/Mailing_list_guidelines#Proper_posting_style
> > >
> > > In particular the top posting bit, which makes it hard to reply to this thread.
> > >
> > > Back to the issue at hand:
> > >
> > > >> > 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.
> > >
> > > Are you able to boot the new kernel with the old userspace? This will
> > > allow you to compare like for like (even if the system is not fully
> > > functional in that state). Alternatively, boot it with a small
> > > non-openbmc initrd to allow comparisons as Kun suggested.
> >
> > I'm going to try building an older kernel with the newer userspace
> > first (it's a slightly easier experiment). I'll post back on this
> > thread once I have a little more information.
>
> Running 4.17 kernel with new userspace:
>
> MemTotal 113944
> MemFree 19316
> MemAvailable 61700
> Buffers 11072
> Cached 48872
> Active 39012
> Inactive 29200
> Active(anon) 17432
> Inactive(anon) 9332
> Active(file) 21580
> Inactive(file) 19868
> Unevitable 9088
> AnonPages 17372
> Mapped 22704
> Shmem 9408
> Slab 11704
> SReclaimable 6204
> SUnreclaim 5500
> KernelStack 648
> PageTables 1472
> CommitLimit 56972
> Commited_AS 125448
> VmallocTota 1957888
>
> Running 4.7.10 kernel with new userspace:
>
> MemTotal: 116224 kB
> MemFree: 27396 kB <--- older kernel same userspace, ~8MiB difference right off.
> MemAvailable: 74212 kB
> Buffers: 10380 kB
> Cached: 46456 kB
> Active: 40516 kB
> Inactive: 33380 kB
> Active(anon): 17124 kB
> Inactive(anon): 9356 kB
> Active(file): 23392 kB
> Inactive(file): 24024 kB
> Unevictable: 0 kB
> AnonPages: 17076 kB
> Mapped: 20696 kB
> Shmem: 9420 kB
> Slab: 9660 kB
> SReclaimable: 4776 kB
> SUnreclaim: 4884 kB
> KernelStack: 744 kB
> PageTables: 1364 kB
> CommitLimit: 58112 kB
> Committed_AS: 116540 kB
> VmallocTotal: 909312 kB
>
> Running 4.7.10 kernel with old (openbmc 1.99) userspace:
>
> MemTotal: 116224 kB
> MemFree: 39636 kB <--- everything before ~12MiB difference.
> MemAvailable: 80224 kB
> Buffers: 9500 kB
> Cached: 38940 kB
> SwapCached: 0 kB
> Active: 36472 kB
> Inactive: 26156 kB
> Active(anon): 14452 kB
> Inactive(anon): 6456 kB
> Active(file): 22020 kB
> Inactive(file): 19700 kB
> Unevictable: 0 kB
> Mlocked: 0 kB
> SwapTotal: 0 kB
> SwapFree: 0 kB
> Dirty: 0 kB
> Writeback: 0 kB
> AnonPages: 14200 kB
> Mapped: 19584 kB
> Shmem: 6720 kB
> Slab: 8928 kB
> SReclaimable: 4256 kB
> SUnreclaim: 4672 kB
> KernelStack: 744 kB
> PageTables: 1320 kB
> NFS_Unstable: 0 kB
> Bounce: 0 kB
> WritebackTmp: 0 kB
> CommitLimit: 58112 kB
> Committed_AS: 139392 kB
> VmallocTotal: 909312 kB
> VmallocUsed: 0 kB
> VmallocChunk: 0 kB
>
> Losing those 8MiB with just a kernel difference, makes me think it is
> always loading more or there's some default 8MiB window being eaten
> now that wasn't before. I deliberately have the VGA window, but
> that's in both kernel's device-trees, so that isn't it -- but it makes
> me think it's something along those lines.
>
> As far as the rest of the loss in userspace :( :( I'll take a look at
> what is built and compare sizes -- my process lists are basically
> identical between old and new userspace, so something in them must
> have changed?
Running with 2.3+ openbmc:
~# ps -eaf
UID PID PPID C STIME TTY TIME CMD
root 1 0 0 Oct08 ? 00:00:31 /sbin/init
root 2 0 0 Oct08 ? 00:00:00 [kthreadd]
root 4 2 0 Oct08 ? 00:00:00 [kworker/0:0H]
root 5 2 0 Oct08 ? 00:00:00 [kworker/u2:0]
root 6 2 0 Oct08 ? 00:00:00 [mm_percpu_wq]
root 7 2 0 Oct08 ? 00:01:16 [ksoftirqd/0]
root 8 2 0 Oct08 ? 00:00:01 [watchdog/0]
root 9 2 0 Oct08 ? 00:00:00 [kdevtmpfs]
root 10 2 0 Oct08 ? 00:00:00 [oom_reaper]
root 11 2 0 Oct08 ? 00:00:00 [kworker/u2:1]
root 151 2 0 Oct08 ? 00:00:00 [writeback]
root 153 2 0 Oct08 ? 00:00:00 [crypto]
root 155 2 0 Oct08 ? 00:00:00 [kblockd]
root 156 2 0 Oct08 ? 00:00:00 [watchdogd]
root 176 2 0 Oct08 ? 00:00:22 [kworker/0:1]
root 197 2 0 Oct08 ? 00:00:00 [kswapd0]
root 245 2 0 Oct08 ? 00:00:00 [hwrng]
root 467 2 0 Oct08 ? 00:00:00 [ipv6_addrconf]
root 497 2 0 Oct08 ? 00:00:00 [kworker/0:1H]
root 525 2 0 Oct08 ? 00:00:00 [jffs2_gcd_mtd5]
root 551 1 0 Oct08 ? 00:02:46 /lib/systemd/systemd-journald
root 647 1 0 Oct08 ? 00:00:01 /lib/systemd/systemd-udevd
systemd+ 866 1 0 Oct08 ? 00:00:28 /lib/systemd/systemd-timesyncd
systemd+ 905 1 0 Oct08 ? 00:00:01 /lib/systemd/systemd-resolved
root 909 1 0 Oct08 ? 00:00:00 phosphor-log-manager
root 910 1 0 Oct08 ? 00:00:01 phosphor-settings-manager
message+ 911 1 1 Oct08 ? 00:16:18 /usr/bin/dbus-daemon
--system --address=systemd: --nofork --nopidfile --systemd-activation
--syslog-only
root 912 1 0 Oct08 ? 00:00:46 python
/usr/sbin/phosphor-mapper --path_namespaces=/org/openbmc
/xyz/openbmc_project --interface_namespaces=xyz.openbmc_project
org.openbmc --blacklists= --
root 913 1 0 Oct08 ? 00:00:10 btbridged
root 914 1 0 Oct08 ? 00:00:00 /sbin/klogd -n
root 915 1 0 Oct08 ? 00:00:03 phosphor-inventory
avahi 916 1 0 Oct08 ? 00:00:08 avahi-daemon: running
[iceblink.local]
root 917 1 0 Oct08 ? 00:00:00 /usr/sbin/snoopd -d
/dev/aspeed-lpc-snoop0 -b 1
root 918 1 0 Oct08 ? 00:00:06 /usr/sbin/rngd -f
root 919 1 0 Oct08 ? 00:00:00 /sbin/syslogd -n
root 921 1 0 Oct08 ? 00:01:50 /bin/bash
/usr/sbin/set_gateway_arp.sh eth1
root 924 1 0 Oct08 ? 00:00:00 phosphor-watchdog
--service=xyz.openbmc_project.Watchdog
--path=/xyz/openbmc_project/watchdog/host0
--target=iceblink-reset.target --continue
root 926 1 0 Oct08 ttyS5 00:00:00 obmc-console-server
--config /etc/obmc-console.conf ttyVUART0
root 931 2 0 Oct08 ? 00:00:00 [kworker/0:2]
avahi 936 916 0 Oct08 ? 00:00:00 avahi-daemon: chroot helper
root 938 1 0 Oct08 ? 00:00:01 ipmid
root 939 1 0 Oct08 ? 00:00:00 slpd
root 941 1 0 Oct08 ttyS4 00:00:00 /bin/login --
root 945 1 0 Oct08 ? 00:00:14 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 300/i2c-switch at 70/i2c at 2/psu at 58
root 947 1 0 Oct08 ? 00:00:12 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 300/i2c-switch at 70/i2c at 1/psu at 58
root 949 1 0 Oct08 ? 00:00:00 phosphor-hwmon-readd
-o /iio-hwmon-battery
root 950 1 0 Oct08 ? 00:01:05 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 80/tmp75 at 4c
root 954 1 0 Oct08 ? 00:00:00 phosphor-dbus-monitor
root 960 1 0 Oct08 ? 00:00:00 phosphor-network-snmpconf
root 965 1 0 Oct08 ? 00:00:03 phosphor-network-manager
root 969 1 0 Oct08 ? 00:00:18 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 300/i2c-switch at 70/i2c at 3/psu at 59
root 970 1 0 Oct08 ? 00:01:03 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 80/tmp75 at 4e
root 971 1 0 Oct08 ? 00:00:21 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 300/i2c-switch at 70/i2c at 0/psu at 59
root 972 1 0 Oct08 ? 00:07:59 phosphor-hwmon-readd
-o /ahb/apb/pwm-tacho-controller at 1e786000
root 973 1 0 Oct08 ? 00:01:05 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 80/tmp75 at 4f
root 975 1 1 Oct08 ? 00:11:36 phosphor-hwmon-readd
-o /iio-hwmon
systemd+ 992 1 0 Oct08 ? 00:00:00 /lib/systemd/systemd-networkd
root 1006 1 0 Oct08 ? 00:02:00 /usr/sbin/ncsid eth1
root 1009 1 2 Oct08 ? 00:28:22 /usr/sbin/swampd
root 1012 1 0 Oct08 ? 00:00:04 /usr/sbin/watchdog
root 12836 1 0 01:46 ? 00:00:09 /usr/sbin/nemorad eth1
root 19051 2 0 07:33 ? 00:00:00 [kworker/u2:2]
root 19054 921 0 07:33 ? 00:00:00 sleep 10
root 19055 941 3 07:33 ttyS4 00:00:00 -sh
root 19059 19055 0 07:33 ttyS4 00:00:00 ps -eaf
The phosphor-hwmon each take 4%
top - 07:36:25 up 16:52, 1 user, load average: 0.15, 0.14, 0.10
Tasks: 65 total, 1 running, 52 sleeping, 0 stopped, 0 zombie
%Cpu(s): 2.9 us, 2.7 sy, 0.0 ni, 94.3 id, 0.0 wa, 0.0 hi, 0.1 si, 0.0 st
KiB Mem : 113960 total, 21252 free, 27920 used, 64788 buff/cache
KiB Swap: 0 total, 0 free, 0 used. 62284 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
912 root 20 0 14664 10356 5444 S 0.0 9.1 0:46.25
python <-- phosphor-mapper python
1 root 20 0 25568 6192 4492 S 0.0 5.4 0:31.74 systemd
12836 root 20 0 42860 5668 5304 S 0.0 5.0 0:09.80 nemorad
938 root 20 0 8236 5204 4644 S 0.0 4.6 0:01.12 ipmid
915 root 20 0 6892 4752 4496 S 0.0 4.2 0:03.57
phosphor-invent
965 root 20 0 6512 4700 4452 S 0.0 4.1 0:03.61
phosphor-networ
1009 root 20 0 41272 4676 4328 S 0.0 4.1 28:26.95 swampd
969 root 20 0 6576 4620 4336 S 0.0 4.1 0:18.10
phosphor-hwmon-
947 root 20 0 6576 4616 4336 S 0.0 4.1 0:12.03
phosphor-hwmon-
971 root 20 0 6576 4608 4336 S 0.0 4.0 0:21.64
phosphor-hwmon-
972 root 20 0 6576 4604 4336 S 0.0 4.0 8:00.20
phosphor-hwmon-
975 root 20 0 6680 4560 4272 S 0.0 4.0 11:38.04
phosphor-hwmon-
945 root 20 0 6576 4544 4272 S 0.0 4.0 0:14.57
phosphor-hwmon-
950 root 20 0 6576 4540 4272 S 0.0 4.0 1:05.53
phosphor-hwmon-
973 root 20 0 6576 4540 4272 S 0.0 4.0 1:06.05
phosphor-hwmon-
949 root 20 0 6576 4528 4272 S 0.0 4.0 0:00.24
phosphor-hwmon-
970 root 20 0 6576 4528 4272 S 0.0 4.0 1:04.10
phosphor-hwmon-
954 root 20 0 8204 4440 4176 S 0.0 3.9 0:00.67
phosphor-dbus-m
551 root 20 0 22400 4336 3932 S 0.0 3.8 2:46.93
systemd-journal
910 root 20 0 6480 4248 4004 S 0.0 3.7 0:01.35
phosphor-settin
924 root 20 0 6208 4128 3920 S 0.0 3.6 0:00.15
phosphor-watchd
909 root 20 0 6336 4088 3860 S 0.0 3.6 0:00.76
phosphor-log-ma
917 root 20 0 6268 3932 3720 S 0.0 3.5 0:00.18 snoopd
960 root 20 0 6256 3856 3648 S 0.0 3.4 0:00.23
phosphor-networ
992 systemd+ 20 0 5472 3800 3472 S 0.0 3.3 0:00.71
systemd-network
905 systemd+ 20 0 5940 3660 3384 S 0.0 3.2 0:01.35
systemd-resolve
866 systemd+ 20 0 24508 3388 3068 S 0.0 3.0 0:28.22
systemd-timesyn
1006 root 20 0 5316 3300 3128 S 0.0 2.9 2:01.05 ncsid
911 message+ 20 0 4404 3072 2456 S 0.0 2.7 16:21.02 dbus-daemon
939 root 20 0 5212 2852 2716 S 0.0 2.5 0:00.15 slpd
916 avahi 20 0 4492 2760 2532 S 0.0 2.4 0:08.32 avahi-daemon
647 root 20 0 3836 2604 2032 S 0.0 2.3 0:01.86 systemd-udevd
19055 root 20 0 3104 2528 2300 S 0.0 2.2 0:00.26 sh
921 root 20 0 3004 2304 2132 S 0.0 2.0 1:51.07
set_gateway_arp
913 root 20 0 2916 1912 1800 S 0.0 1.7 0:10.42 btbridged
941 root 20 0 3520 1900 1640 S 0.0 1.7 0:00.59 login
19111 root 20 0 2804 1796 1588 R 36.0 1.6 0:00.20 top
914 root 20 0 3272 1668 1588 S 0.0 1.5 0:00.07 klogd
919 root 20 0 3272 1644 1588 S 0.0 1.4 0:00.12 syslogd
936 avahi 20 0 4368 1392 1252 S 0.0 1.2 0:00.01 avahi-daemon
19110 root 20 0 3140 1252 1204 S 0.0 1.1 0:00.01 sleep
926 root 20 0 1896 1124 1052 S 0.0 1.0 0:00.10
obmc-console-se
918 root 20 0 1756 1088 1044 S 0.0 1.0 0:06.81 rngd
1012 root 20 0 1836 1052 988 S 0.0 0.9 0:04.59 watchdog
Running with 1.99.10 openbmc:
ps -eaf
UID PID PPID C STIME TTY TIME CMD
root 1 0 0 May24 ? 00:01:07 /sbin/init
root 2 0 0 May24 ? 00:00:00 [kthreadd]
root 3 2 0 May24 ? 00:01:55 [ksoftirqd/0]
root 5 2 0 May24 ? 00:00:00 [kworker/0:0H]
root 7 2 0 May24 ? 00:00:00 [lru-add-drain]
root 8 2 0 May24 ? 00:00:00 [kdevtmpfs]
root 9 2 0 May24 ? 00:00:00 [kworker/u2:1]
root 10 2 0 May24 ? 00:00:00 [oom_reaper]
root 133 2 0 May24 ? 00:00:00 [writeback]
root 134 2 0 May24 ? 00:00:00 [kcompactd0]
root 136 2 0 May24 ? 00:00:00 [bioset]
root 138 2 0 May24 ? 00:00:00 [kblockd]
root 143 2 0 May24 ? 00:00:00 [watchdogd]
root 166 2 0 May24 ? 00:00:00 [rpciod]
root 175 2 0 May24 ? 00:00:00 [kswapd0]
root 176 2 0 May24 ? 00:00:00 [nfsiod]
root 210 2 0 May24 ? 00:00:00 [bioset]
root 211 2 0 May24 ? 00:00:00 [bioset]
root 212 2 0 May24 ? 00:00:00 [bioset]
root 213 2 0 May24 ? 00:00:00 [bioset]
root 223 2 0 May24 ? 00:00:00 [bioset]
root 226 2 0 May24 ? 00:00:00 [bioset]
root 229 2 0 May24 ? 00:00:00 [bioset]
root 232 2 0 May24 ? 00:00:00 [bioset]
root 235 2 0 May24 ? 00:00:00 [bioset]
root 238 2 0 May24 ? 00:00:00 [bioset]
root 241 2 0 May24 ? 00:00:00 [bioset]
root 244 2 0 May24 ? 00:00:00 [bioset]
root 256 2 0 May24 ? 00:00:00 [bioset]
root 261 2 0 May24 ? 00:00:00 [bioset]
root 266 2 0 May24 ? 00:00:00 [bioset]
root 271 2 0 May24 ? 00:00:00 [bioset]
root 276 2 0 May24 ? 00:00:00 [bioset]
root 281 2 0 May24 ? 00:00:00 [bioset]
root 447 2 0 May24 ? 00:00:00 [ipv6_addrconf]
root 452 2 0 May24 ? 00:00:00 [deferwq]
root 500 2 0 May24 ? 00:00:00 [jffs2_gcd_mtd5]
root 505 2 0 May24 ? 00:00:00 [kworker/0:1H]
root 520 1 3 May24 ? 00:39:30 /lib/systemd/systemd-journald
root 612 1 0 May24 ? 00:00:01 /lib/systemd/systemd-udevd
systemd+ 835 1 0 May24 ? 00:03:00 /lib/systemd/systemd-timesyncd
root 923 1 0 May24 ttyS0 00:00:00 obmc-console-server
--config /etc/obmc-console.conf ttyVUART0
root 924 1 0 May24 ? 00:00:00 phosphor-settings-manager
root 925 1 0 May24 ? 00:00:02 phosphor-inventory
root 927 1 0 May24 ? 00:00:00 /usr/sbin/snoopd
root 928 1 0 May24 ? 00:00:00 phosphor-log-manager
root 929 1 0 May24 ? 00:06:36 btbridged
root 930 1 0 May24 ? 00:02:48 phosphor-watchdog
--service=xyz.openbmc_project.Watchdog
--path=/xyz/openbmc_project/watchdog/host0
--target=iceblink-reset.target --continue
root 931 1 36 May24 ? 07:39:09 python
/usr/sbin/phosphor-mapper --path_namespaces=/org/openbmc
/xyz/openbmc_project --interface_namespaces=org.openbmc
xyz.openbmc_project --blacklists= --
message+ 937 1 6 May24 ? 01:22:47 /usr/bin/dbus-daemon
--system --address=systemd: --nofork --nopidfile --systemd-activation
root 960 1 0 May24 ? 00:01:39 /sbin/syslogd -n
root 961 1 0 May24 ? 00:00:00 /sbin/klogd -n
avahi 962 1 0 May24 ? 00:00:05 avahi-daemon: running
[iceblink.local]
root 963 1 0 May24 ? 00:02:01 /bin/bash
/usr/sbin/set_gateway_arp.sh eth1
avahi 974 962 0 May24 ? 00:00:00 avahi-daemon: chroot helper
root 976 1 0 May24 ? 00:00:00 slpd
root 977 1 1 May24 ? 00:23:49 ipmid
root 979 1 0 May24 ttyS4 00:00:00 /bin/login --
systemd+ 985 1 0 May24 ? 00:00:00 /lib/systemd/systemd-networkd
root 990 979 0 May24 ttyS4 00:00:00 -sh
root 995 1 0 May24 ? 00:00:40 phosphor-hwmon-readd
-o /iio-hwmon
root 996 1 7 May24 ? 01:31:52 phosphor-hwmon-readd
-o /pwm-tacho-controller at 1e786000
root 997 1 0 May24 ? 00:03:21 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 300/i2c-switch at 70/i2c at 0/psu at 59
root 998 1 0 May24 ? 00:03:18 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 300/i2c-switch at 70/i2c at 2/psu at 58
root 999 1 0 May24 ? 00:00:36 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 80/tmp75 at 4c
root 1000 1 0 May24 ? 00:00:36 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 80/tmp75 at 4e
root 1001 1 0 May24 ? 00:03:23 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 300/i2c-switch at 70/i2c at 3/psu at 59
root 1002 1 0 May24 ? 00:00:37 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 80/tmp75 at 4f
root 1003 1 0 May24 ? 00:03:31 phosphor-hwmon-readd
-o /ahb/apb/i2c at 1e78a000/i2c-bus at 300/i2c-switch at 70/i2c at 1/psu at 58
root 1006 1 0 May24 ? 00:00:03 phosphor-network-manager
root 1013 1 0 May24 ? 00:00:00 phosphor-dbus-monitor
root 1017 1 0 May24 ? 00:00:00 phosphor-hwmon-readd
-o /iio-hwmon-battery
root 1073 1 0 May24 ? 00:00:34 /usr/sbin/ncsid eth1
root 1088 1 1 May24 ? 00:18:51 /usr/sbin/swampd
root 1090 1 0 May24 ? 00:00:02 /usr/sbin/watchdog
root 14996 2 0 07:21 ? 00:00:00 [kworker/u2:0]
root 25090 2 0 16:00 ? 00:00:00 [kworker/0:0]
root 25220 2 0 16:07 ? 00:00:00 [kworker/0:1]
root 25520 2 0 16:21 ? 00:00:00 [kworker/0:2]
root 25625 2 0 16:26 ? 00:00:00 [kworker/0:3]
root 25655 1 1 16:27 ? 00:00:00 /usr/sbin/nemorad eth1
root 25660 963 0 16:27 ? 00:00:00 sleep 10
root 25661 990 0 16:27 ttyS4 00:00:00 ps -eaf
top - 16:27:46 up 20:51, 1 user, load average: 0.74, 0.98, 1.02
Tasks: 83 total, 4 running, 79 sleeping, 0 stopped, 0 zombie
%Cpu(s): 38.3 us, 10.5 sy, 0.0 ni, 51.1 id, 0.0 wa, 0.0 hi, 0.1 si, 0.0 st
KiB Mem : 116224 total, 36440 free, 25856 used, 53928 buff/cache
KiB Swap: 0 total, 0 free, 0 used. 77640 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
931 root 20 0 16252 10664 5824 R 39.2 9.2 459:16.10 python
977 root 20 0 9872 7364 4932 S 0.0 6.3 23:49.80 ipmid
1 root 20 0 25124 5332 4420 S 0.0 4.6 1:07.47 systemd
25655 root 20 0 26104 4964 4656 S 0.0 4.3 0:00.12 nemorad
1006 root 20 0 6264 4560 4328 S 0.0 3.9 0:03.63
phosphor-networ
925 root 20 0 6596 4520 4224 S 0.0 3.9 0:02.76
phosphor-invent
1017 root 20 0 6228 4468 4228 S 0.0 3.8 0:00.72
phosphor-hwmon-
995 root 20 0 6228 4416 4164 S 0.0 3.8 0:40.10
phosphor-hwmon-
996 root 20 0 6228 4404 4164 S 0.0 3.8 91:53.64
phosphor-hwmon-
997 root 20 0 6228 4404 4164 S 0.0 3.8 3:21.94
phosphor-hwmon-
998 root 20 0 6228 4404 4164 S 0.0 3.8 3:18.27
phosphor-hwmon-
1001 root 20 0 6228 4404 4164 S 0.0 3.8 3:23.29
phosphor-hwmon-
1003 root 20 0 6228 4404 4164 S 0.0 3.8 3:31.54
phosphor-hwmon-
1000 root 20 0 6228 4400 4164 S 0.0 3.8 0:36.22
phosphor-hwmon-
1002 root 20 0 6228 4396 4164 S 0.0 3.8 0:37.46
phosphor-hwmon-
999 root 20 0 6228 4392 4164 S 0.0 3.8 0:36.41
phosphor-hwmon-
1088 root 20 0 41008 4368 4064 S 0.0 3.8 18:52.12 swampd
520 root 20 0 22776 4320 3964 S 0.0 3.7 39:30.70
systemd-journal
928 root 20 0 6048 4016 3800 S 0.0 3.5 0:00.14
phosphor-log-ma
985 systemd+ 20 0 5748 3880 3600 S 0.0 3.3 0:00.25
systemd-network
924 root 20 0 6208 3724 3516 S 0.0 3.2 0:00.40
phosphor-settin
835 systemd+ 20 0 14976 3512 3252 S 0.0 3.0 3:00.64
systemd-timesyn
930 root 20 0 5948 3456 3260 S 0.0 3.0 2:48.19
phosphor-watchd
927 root 20 0 15052 3296 3092 S 0.0 2.8 0:00.31 snoopd
1073 root 20 0 5244 3132 2980 S 0.0 2.7 0:34.43 ncsid
937 message+ 20 0 5072 3124 2584 R 0.0 2.7 82:48.94 dbus-daemon
962 avahi 20 0 5304 2880 2656 S 0.0 2.5 0:05.99 avahi-daemon
976 root 20 0 5160 2756 2620 S 0.0 2.4 0:00.10 slpd
979 root 20 0 5580 2716 2432 S 0.0 2.3 0:00.57 login
1013 root 20 0 5152 2592 2444 S 0.0 2.2 0:00.00
phosphor-dbus-m
990 root 20 0 3072 2520 2320 S 0.0 2.2 0:00.06 sh
612 root 20 0 3724 2444 2116 S 0.0 2.1 0:01.96 systemd-udevd
963 root 20 0 3072 2304 2144 S 0.0 2.0 2:01.88
set_gateway_arp
929 root 20 0 3816 2232 2120 S 0.0 1.9 6:36.91 btbridged
25668 root 20 0 3068 1876 1648 R 28.4 1.6 0:00.46 top
960 root 20 0 3040 1604 1556 S 0.0 1.4 1:39.19 syslogd
961 root 20 0 3040 1572 1508 S 0.0 1.4 0:00.13 klogd
974 avahi 20 0 5180 1384 1224 S 0.0 1.2 0:00.00 avahi-daemon
25667 root 20 0 2908 1216 1172 S 0.0 1.0 0:00.03 sleep
923 root 20 0 1876 1184 1116 S 0.0 1.0 0:00.56
obmc-console-se
1090 root 20 0 1816 1048 984 S 0.0 0.9 0:02.48 watchdog
>
> >
> > >
> > > The kernel has grown a bunch of new drivers. Most of them should not
> > > probe, and therefore won't allocate memory at run time, but there may
> > > be some new ones.
> > >
> > > I've not spent much time looking at runtime memory usage, so if these
> > > suggestions don't provide answers we might need to investigate a bit
> > > deeper.
> > >
> > > >> > 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.
> > >
> > > I initially thought you were confusing RAM with flash size, but on a
> > > second read I now understand.
> > >
> > > There has been recent work to create phosphor-tiny, is that relevant here Brad?
>
> So, the image fits on my flash chip, but it may have extra daemons
> that are being mapped in from flash for the fs?
>
> > >
> > > Cheers,
> > >
> > > Joel
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