From: Nikola Ciprich <nikola.ciprich@linuxbox.cz>
To: netdev@vger.kernel.org
Cc: nikola.ciprich@linuxbox.cz
Subject: 4.4.0 - e1000e - possible power management issue
Date: Tue, 19 Apr 2016 21:53:44 +0200 [thread overview]
Message-ID: <20160419195344.GA8663@nik-comp.linuxbox.cz> (raw)
[-- Attachment #1: Type: text/plain, Size: 2565 bytes --]
Hi,
after upgrading our firewall from 4.1.17 to 4.4.0, we've noticed quite a performance
drop.. Slight network load seems to cause high CPU load..
running perf of almost idle system shows:
samples pcnt function DSO
_______ _____ _______________________________________ ___________________________________________________________________________
631.00 20.7% e1000_power_down_phy_copper_80003es2lan /lib/modules/4.4.0lb6.01/kernel/drivers/net/ethernet/intel/e1000e/e1000e.ko
191.00 6.3% do_raw_spin_lock [kernel.kallsyms]
165.00 5.4% ipt_register_table /lib/modules/4.4.0lb6.01/kernel/net/ipv4/netfilter/ip_tables.ko
119.00 3.9% cache_init /usr/sbin/netstat-probe
118.00 3.9% __memset_sse2 /lib64/libc-2.12.so
88.00 2.9% cache_write_packet /usr/sbin/netstat-probe
41.00 1.3% __fget [kernel.kallsyms]
40.00 1.3% memcpy [kernel.kallsyms]
when there is some network traffic, e1000_power_down_phy_copper_80003es2lan jumps to much higher
numbers.. as far as I understand the code, this seems suspicious to me..
Anyone hit the same problem?
I can try upgrading to 4.4.8-rc1 tomorrow or reverting to 4.1.17
lspci of the box adapters:
05:00.0 Ethernet controller: Intel Corporation 82573E Gigabit Ethernet Controller (Copper) (rev 03)
07:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet Controller
09:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet Controller
0b:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet Controller
BR
nik
--
-------------------------------------
Ing. Nikola CIPRICH
LinuxBox.cz, s.r.o.
28. rijna 168, 709 00 Ostrava
tel.: +420 591 166 214
fax: +420 596 621 273
mobil: +420 777 093 799
www.linuxbox.cz
mobil servis: +420 737 238 656
email servis: servis@linuxbox.cz
-------------------------------------
[-- Attachment #2: Type: application/pgp-signature, Size: 198 bytes --]
reply other threads:[~2016-04-19 20:20 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160419195344.GA8663@nik-comp.linuxbox.cz \
--to=nikola.ciprich@linuxbox.cz \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.