Date: Wed, 10 Jun 2015 20:33:02 +0800 From: Yanhui Shen <shen.elf@gmail.com> To: henry.hu.sh@gmail.com Cc: freebsd-stable@freebsd.org Subject: High Interrupt rate since r279961 on STABLE/10 branch Message-ID: <CAEEM4vmsVQDiRoiiknz=4hH5b6Pyq94faC6FeAR%2B1WxyapGc-w@mail.gmail.com>
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Hi, I noticed the interrupt rate of my FreeBSD system is very high (~35%) after upgrade from r279138 to r284205. To find out which revision cause this problem, I used a binary search manner and compiled the kernel 11 times. Finally I located to r279961, the interruption rate is abnormal since this revision. Do you have any idea about this issue? ( I'm temporarily using r279958 kernel with r284205 base system, everything is fine.) -------------------------------- Device: ThinkPad R400 (Product ID: 278225C) CPU: Intel Core 2 Duo processor T6570 (2.1 GHz) GPU: Intel Integrated Graphics 4500MHD Output of "vmstat -i" with r284205 kernel (abnormal): interrupt total rate irq1: atkbd0 1607 1 irq9: acpi0 131958 104 irq12: psm0 4281 3 irq16: uhci3 239899376 189643 irq20: hpet0 uhci0 1426118 1127 irq21: uhci1 40315 31 irq23: ehci0 33 0 irq256: vgapci0 6059 4 irq257: em0 49220 38 irq258: hdac0 62 0 irq260: ahci0:ch0 17217 13 irq261: ahci0:ch1 23 0 Total 241576269 190969 Output of "vmstat -i" with r279958 kernel (normal): interrupt total rate irq1: atkbd0 48155 3 irq9: acpi0 1581468 105 irq12: psm0 209484 13 irq19: ehci1 48099 3 irq20: hpet0 uhci0 17385585 1156 irq21: uhci1 680884 45 irq23: ehci0 31 0 irq256: vgapci0 2611430 173 irq257: em0 1342009 89 irq258: hdac0 602220 40 irq260: ahci0:ch0 236313 15 irq261: ahci0:ch1 27 0 Total 24745705 1646 The revision: https://svnweb.freebsd.org/base?view=revision&revision=279961 -------------------------------- Best regards, Yanhui Shen
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