Date: Wed, 11 Sep 2013 21:51:16 -0700 From: hiren panchasara <hiren.panchasara@gmail.com> To: freebsd-current <freebsd-current@freebsd.org> Subject: Intermittent hangs in vmem_periodic() Message-ID: <CALCpEUGherrJbmW9PBO7kSQk1Gj4zigGvvsRiyAwjk-USOXTUw@mail.gmail.com>
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I am seeing really weird system freeze for 2-3 seconds every minute or so. % uname -a FreeBSD flymockour-l7.corp.yahoo.com 10.0-CURRENT FreeBSD 10.0-CURRENT #2 r255423M: Mon Sep 9 12:29:22 PDT 2013 root@flymocko ur-l7.corp.yahoo.com:/usr/obj/usr/home/hirenp/head/sys/GENERIC amd64 Simple comands like "man top" hangs and this is what I see in ctrl+T % man top load: 1.59 cmd: zcat 76574 [*kmem arena] 2.16r 0.00u 1.82s 16% 2000k load: 1.70 cmd: zcat 76574 [*kmem arena] 7.19r 0.00u 1.82s 7% 2000k load: 1.89 cmd: zcat 76574 [*kmem arena] 12.58r 0.00u 1.82s 3% 2000k load: 1.90 cmd: zcat 76574 [*kmem arena] 14.58r 0.00u 1.82s 2% 2000k I see similar things while trying to "exit" a terminal window. I see following in pmcstat: PMC: [INSTR_RETIRED_ANY] Samples: 117647 (100.0%) , 6885 unresolved %SAMP CALLTREE 75.9 fork_exit@kernel taskqueue_thread_loop taskqueue_run_locked vmem_periodic(75.9%) I am not running anything funny and I do not see anything weird in "top" too. Any help is appreciated. cheers, Hiren
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