head -r3418363: top -opid process list order is rather odd (top -Saopid example shown)
Yuri Pankov
yuripv at yuripv.net
Mon Dec 24 21:50:16 UTC 2018
Mark Millard wrote:
> From my from=source head -r3418363 context, top with -opid does not
> seem to sort in a coherent order, not time of process creation order
> (either direction) and not in just-PID numeric order (either
> direction). For example:
>
> PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
> 0 root 24 -16 - 0 368K swapin 1 0:00 0.00% [kernel]
> 16 root 1 -16 - 0 16K - 3 0:00 0.00% [soaiod2]
> 752 root 1 20 0 18M 18M select 1 0:07 0.01% /usr/sbin/ntpd -p /var/db/ntp/ntpd.pid -c /etc/ntp.conf -g
> 800 root 1 20 0 11M 908K nanslp 1 0:01 0.00% /usr/sbin/cron -s
> 1 root 1 20 0 9900K 132K wait 3 0:00 0.00% [init]
> 17 root 1 -16 - 0 16K - 0 0:00 0.00% [soaiod3]
> 2 root 1 -16 - 0 16K crypto 0 0:00 0.00% [crypto]
> 18 root 1 -16 - 0 16K - 0 0:00 0.00% [soaiod4]
> 850 root 1 20 0 13M 2756K wait 3 0:00 0.00% login [pam] (login)
> 3 root 1 -16 - 0 16K crypto 0 0:00 0.00% [crypto returns 0]
> 19 root 1 -16 - 0 16K mmcsd 0 0:25 0.00% [mmcsd0: mmc/sd card]
> 643 root 1 20 0 11M 1124K select 2 0:01 0.00% /usr/sbin/syslogd -s
> 4 root 1 -16 - 0 16K crypto 0 0:00 0.00% [crypto returns 1]
> 20 root 1 -16 - 0 16K mmcsd 0 0:00 0.00% [mmcsd0boot0: mmc/sd]
> 5 root 1 -16 - 0 16K crypto 0 0:00 0.00% [crypto returns 2]
> 21 root 1 -16 - 0 16K mmcsd 0 0:00 0.00% [mmcsd0boot1: mmc/sd]
> 6 root 1 -16 - 0 16K crypto 0 0:00 0.00% [crypto returns 3]
> 22 root 3 -16 - 0 48K psleep 3 0:12 0.00% [pagedaemon]
> 5270 root 1 20 0 14M 3780K CPU2 2 0:00 0.14% top -Saopid
> 662 root 1 20 0 11M 680K select 0 0:00 0.00% /usr/sbin/rpcbind
> 7 root 2 -16 - 0 32K - 0 0:00 0.00% [cam]
> 23 root 1 -16 - 0 16K psleep 2 0:00 0.00% [vmdaemon]
> 5255 root 1 20 0 12M 3092K wait 0 0:00 0.00% -sh (sh)
> 8 root 1 -16 - 0 16K waitin 0 0:00 0.00% [sctp_iterator]
> 24 root 3 -16 - 0 48K qsleep 3 0:12 0.01% [bufdaemon]
> 712 root 1 52 0 12M 616K select 0 0:00 0.00% /usr/sbin/mountd -r
> 9 root 1 -16 - 0 16K - 1 0:04 0.00% [rand_harvestq]
> 25 root 1 20 - 0 16K vlruwt 0 0:04 0.00% [vnlru]
> 10 root 1 -16 - 0 16K audit_ 0 0:00 0.00% [audit]
> 26 root 1 16 - 0 16K syncer 0 1:45 0.00% [syncer]
> 714 root 1 52 0 12M 728K select 3 0:00 0.00% nfsd: master (nfsd)
> 11 root 4 155 ki31 0 64K CPU0 0 144.6H 397.09% [idle]
> 235 root 1 20 0 11M 564K select 3 0:00 0.00% dhclient: system.syslog (dhclient)
> 715 root 32 52 0 11M 1120K rpcsvc 3 0:00 0.00% nfsd: server (nfsd)
> 12 root 18 -52 - 0 288K WAIT 2 2:29 1.43% [intr]
> 412 root 1 20 0 10M 72K select 2 0:00 0.00% /sbin/devd
> 796 root 1 52 0 20M 672K select 0 0:00 0.00% /usr/sbin/sshd
> 13 root 3 -8 - 0 48K - 1 0:11 0.00% [geom]
> 14 root 20 -68 - 0 320K - 0 0:02 0.00% [usb]
> 238 root 1 52 0 12M 416K select 1 0:00 0.00% dhclient: awg0 [priv] (dhclient)
> 15 root 1 -16 - 0 16K - 0 0:00 0.00% [soaiod1]
> 239 _dhcp 1 20 0 12M 484K select 1 0:00 0.00% dhclient: awg0 (dhclient)
>
> (Basically the Pine64+ 2GB [aarch64] above was idle after boot other than
> some runs of top.)
>
> I see this oddity across architectures, for example amd64, powerpc64,
> aarch64, armv7.
No wonder, it doesn't seem to have worked ever (?) as the compare_pid is
simply not defined in compares list. Try attached patch.
-------------- next part --------------
diff --git a/usr.bin/top/machine.c b/usr.bin/top/machine.c
index 374c9da0edf4..cd17f2f5dc3a 100644
--- a/usr.bin/top/machine.c
+++ b/usr.bin/top/machine.c
@@ -1511,6 +1511,7 @@ int (*compares[])(const void *arg1, const void *arg2) = {
compare_ivcsw,
compare_jid,
compare_swap,
+ compare_pid,
NULL
};
-------------- next part --------------
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