Date: Fri, 25 Jan 2008 14:03:20 +0200 From: Stefan Lambrev <stefan.lambrev@moneybookers.com> To: freebsd-pf@freebsd.org Subject: Re: PF makes em0 taskq to eat 100% CPU Message-ID: <4799D008.8020201@moneybookers.com> In-Reply-To: <4798B13D.4080701@moneybookers.com> References: <4798B13D.4080701@moneybookers.com>
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Greets, Thanks to Kris Kennaway I was able to get pmc profiling working, Here is the "top" while flooding target behind the firewall: % cumulative self self total time seconds seconds calls ms/call ms/call name 24.4 231689.00 231689.00 0 100.00% _mtx_lock_sleep [1] 6.5 293004.00 61315.00 0 100.00% pf_state_compare_ext_gwy [2] 6.4 353672.00 60668.00 0 100.00% pf_src_compare [3] 3.8 389565.00 35893.00 0 100.00% pf_state_compare_lan_ext [4] 3.5 422911.00 33346.00 0 100.00% pf_test [5] 3.2 453703.00 30792.00 0 100.00% bcopy [6] 2.9 481264.00 27561.00 0 100.00% pf_test_tcp [7] 2.1 501546.00 20282.00 0 100.00% pfsync_pack_state [8] 2.0 520685.00 19139.00 0 100.00% pf_state_compare_id [9] 2.0 539293.00 18608.00 0 100.00% bridge_pfil [10] 1.6 554228.00 14935.00 0 100.00% uma_zfree_arg [11] 1.5 568593.00 14365.00 0 100.00% uma_zalloc_arg [12] 1.4 581556.00 12963.00 0 100.00% bzero [13] 1.2 592594.00 11038.00 0 100.00% bus_dmamap_load_mbuf_sg [14] 1.1 603052.00 10458.00 0 100.00% bridge_rtnode_lookup [15] 1.1 613173.50 10121.50 0 100.00% _rw_rlock [16] 1.0 622984.50 9811.00 0 100.00% rn_match [17] 1.0 632477.00 9492.50 0 100.00% pf_state_tree_id_RB_REMOVE [18] 0.9 641356.00 8879.00 0 100.00% bridge_forward [19] 0.9 649984.00 8628.00 0 100.00% em_encap [20] 0.9 658479.00 8495.00 0 100.00% _rw_runlock [21] So the kernel spend 24.4% waiting for _mtx_lock_sleep .. I think something is really wrong here. I'll make profiling with polling enabled on network interfaces. -- Best Wishes, Stefan Lambrev ICQ# 24134177
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