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Groups > linux.debian.isp > #1596
| From | Matus UHLAR - fantomas <uhlar@fantomas.sk> |
|---|---|
| Newsgroups | linux.debian.isp |
| Subject | Re: High CPU usage after upgrading from Debian 7 to Debian 9 |
| Date | 2019-04-17 13:20 +0200 |
| Message-ID | <xNQLE-5FB-3@gated-at.bofh.it> (permalink) |
| References | <xN5a1-1mZ-3@gated-at.bofh.it> <xN5to-1tg-5@gated-at.bofh.it> <xNxfX-1VF-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 16.04.19 17:22, Алексей wrote: >Thanks for your answer. > >I have Intel(R) Xeon(R) CPU E3-1220 v3 @ 3.10GHz inside - no HT on it. > >And I already have CPU microcode installed: > >dpkg -l | grep microcode >ii amd64-microcode 3.20160316.3 amd64 Processor microcode firmware for AMD CPUs >ii intel-microcode 3.20180807a.1~deb9u1 amd64 Processor microcode firmware for Intel CPUs >Do you think removing it would help? you surely don't need amd64-microcode, you can try uninstalling intel-microcode to see if it helps. I think there are some option to disable spectre/meltdown mitigation in the kernel, just haven't found them yet... you can try to search for them >Also I have Broadcom network adapters - if it is important: should not be. >15 апреля 2019, 11:45:37, от "Matus UHLAR - fantomas" <uhlar@fantomas.sk>: > >On 15.04.19 11:05, Алексей wrote: >>I have two Debian boxes acting as a routesr (+iptables +quagga(BGP)). I have updated one from Debian 7 to Debian 9 recently and now experience 2x CPU utilization on the same amounts of traffic, e.g. on normal load of 1Gbps (real-world traffic) Debian 7 had 5-6% and Debian 9 has 10-12% softirq CPU time. This behaviour can also be observed during tests - 6Gbps iperf gets 3% on Debian 7 and 6% on Debian 9. >> >>I compared ethtool -k outputs on both boxes and they are pretty similar. Syslog doesn't show anything suspicious. >> >>Did anyone have the similar issue? Or can give me some advice on troubleshooting? > >we have noticed something similar due to the spectre/meltdown updates. >Turning off HT cpus did help much. >not installing the CPU microcode should help too. -- Matus UHLAR - fantomas, uhlar@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. There's a long-standing bug relating to the x86 architecture that allows you to install Windows. -- Matthew D. Fuller
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High CPU usage after upgrading from Debian 7 to Debian 9 Алексей <rbl@ukr.net> - 2019-04-15 10:30 +0200
Re: High CPU usage after upgrading from Debian 7 to Debian 9 Matus UHLAR - fantomas <uhlar@fantomas.sk> - 2019-04-15 10:50 +0200
Re[2]: High CPU usage after upgrading from Debian 7 to Debian 9 Алексей <rbl@ukr.net> - 2019-04-16 16:30 +0200
Re: High CPU usage after upgrading from Debian 7 to Debian 9 Matus UHLAR - fantomas <uhlar@fantomas.sk> - 2019-04-17 13:20 +0200
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