| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <41ac0f9e1001280826j1a4e6caar47ccfd357b6feb37@mail.gmail.com> Date: Thu, 28 Jan 2010 18:26:50 +0200 From: cold cold <nedkonedev@...il.com> To: Eric Dumazet <eric.dumazet@...il.com> Cc: netdev@...r.kernel.org Subject: Re: 0% cpu usasge after fresh boot or net restart but 10% CPU if kernel flush route cache On Thu, Jan 28, 2010 at 6:09 PM, Eric Dumazet <eric.dumazet@...il.com> wrote: > Le jeudi 28 janvier 2010 à 11:14 +0200, cold cold a écrit : > >> >> RX Kpps : 57 TX Kpps : 53 RX Kbits : 331184 TX Kbits : 306213 >> RX Kpps : 59 TX Kpps : 54 RX Kbits : 345517 TX Kbits : 304323 >> RX Kpps : 56 TX Kpps : 52 RX Kbits : 331418 TX Kbits : 296032 >> RX Kpps : 60 TX Kpps : 54 RX Kbits : 362007 TX Kbits : 297371 >> RX Kpps : 59 TX Kpps : 52 RX Kbits : 360455 TX Kbits : 280603 >> >> >> ON one cpu, gc_interval to 1, gc_elasticity 2 >> >> Cpu0 : 0.0%us, 0.0%sy, 0.0%ni, 72.0%id, 0.0%wa, 8.3%hi, 19.7%si, 0.0%st >> Cpu1 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st >> Cpu2 : 0.0%us, 0.3%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st >> Cpu3 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st >> >> ------------------------------------------------------------------------------ >> PerfTop: 17064 irqs/sec kernel:98.0% [100000 cycles], (all, 4 CPUs) >> ------------------------------------------------------------------------------ >> >> samples pcnt kernel function >> _______ _____ _______________ >> >> 40388.00 - 27.8% : acpi_idle_do_entry >> 24651.00 - 17.0% : read_hpet >> 4271.00 - 2.9% : _spin_lock >> 3388.00 - 2.3% : pskb_expand_head >> 3288.00 - 2.3% : igb_poll [igb] >> 3246.00 - 2.2% : irq_entries_start >> 2868.00 - 2.0% : dev_gro_receive >> 2665.00 - 1.8% : igb_xmit_frame_adv [igb] >> 2513.00 - 1.7% : ip_route_input >> 2144.00 - 1.5% : igb_clean_tx_irq [igb] >> 1842.00 - 1.3% : __slab_free >> 1544.00 - 1.1% : dev_queue_xmit >> 1423.00 - 1.0% : igb_msix_rx [igb] >> 1353.00 - 0.9% : __alloc_skb >> 1285.00 - 0.9% : eth_type_trans >> -- > > All this seems pretty normal profile (regarding networking functions), > your machine should scale without problem. > > Of course, the two first functions (acpi_idle_do_entry() & read_hpet()) > look suspicious but I have no idea why. > i make with flushing without gc on 2 cpu 2 time more traffic and CPU usage about 5 times less top - 11:22:04 up 6:45, 5 users, load average: 0.00, 0.10, 0.25 Tasks: 84 total, 1 running, 83 sleeping, 0 stopped, 0 zombie Cpu0 : 0.0%us, 0.3%sy, 0.0%ni, 94.0%id, 0.0%wa, 1.7%hi, 4.0%si, 0.0%st Cpu1 : 0.3%us, 0.0%sy, 0.0%ni, 97.7%id, 0.0%wa, 0.7%hi, 1.3%si, 0.0%st Cpu2 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu3 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st RX Kpps : 90 TX Kpps : 75 RX Kbits : 582791 TX Kbits : 413873 RX Kpps : 87 TX Kpps : 74 RX Kbits : 546327 TX Kbits : 415852 RX Kpps : 87 TX Kpps : 74 RX Kbits : 544820 TX Kbits : 418339 RX Kpps : 88 TX Kpps : 73 RX Kbits : 569143 TX Kbits : 406438 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists