search for: cpustop_handl

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Did you mean: cpustop_handler
2009 Jan 28
0
smp_tlb_shootdown bottleneck?
...me to time. Usually this sysbench test passed in a few seconds, and at this time it runs in more than 10 seconds. breaking to ddb while seen too much system load shows many sysbench threads waiting for a mutex in smp_tlb_shootdown: db> bt 100133 Tracing pid 810 tid 100133 td 0xffffff00032d56e0 cpustop_handler() at cpustop_handler+0x40 ipi_nmi_handler() at ipi_nmi_handler+0x30 trap() at trap+0x378 nmi_calltrap() at nmi_calltrap+0x8 --- trap 0x13, rip = 0xffffffff8074c912, rsp = 0xffffffffab79fff0, rbp = 0xffffffffb4acf6f0 --- smp_tlb_shootdown() at smp_tlb_shootdown+0x82 pmap_invalidate_range() at pmap...
2012 Nov 13
1
thread taskq / unp_gc() using 100% cpu and stalling unix socket IPC
...3:19 12.89% pop3-login [3] db:0:kdb.enter.sysctl> run lockinfo db:1:lockinfo> show locks No such command db:1:locks> show alllocks No such command db:1:alllocks> show lockedvnods Locked vnodes db:0:kdb.enter.sysctl> trace 100058 Tracing pid 0 tid 100058 td 0xfffffe00262fc000 cpustop_handler() at cpustop_handler+0x28 ipi_nmi_handler() at ipi_nmi_handler+0x3d trap() at trap+0x2ea nmi_calltrap() at nmi_calltrap+0x8 --- trap 0x13, rip = 0xffffffff809a2a3e, rsp = 0xffffff800039efe0, rbp = 0xffffff975cf4aa10 --- unp_gc() at unp_gc+0x20e taskqueue_run_locked() at taskqueue_run_locked+0x85...