linaro-dev June 2012

linaro-dev@lists.linaro.org

85 participants
81 discussions

by David Cullen

Hello, linaro-dev, When I boot the Ubuntu desktop image available from http://releases.linaro.org/12.06/ubuntu/leb-panda/lt-panda-x11-base_2012062… all I see is a black screen and the mouse pointer. I see some messages on the console like [ 13.996887] (stk) : timed out waiting for ldisc to be un-installed [ 15.145019] (stk) :ldisc installation timeout and [ 22.983459] omap-hdmi-audio-dai omap-hdmi-audio-dai: audio not supported [ 22.990631] omap-hdmi-audio-dai omap-hdmi-audio-dai: can't open interface omap-hdmi-audio-dai: -19 My PandaBoard is connected to a Dell monitor with a native resolution of 1680 x 1050. Is this a problem? -- Thank you, David

12 years, 5 months

Linaro recommended (tm) brand of SD card?

by Michael Hudson-Doyle

Hi, The SD card I routinely use for testing which I got at some Linaro meeting or other has fallen apart (physically), so I'm on the hunt for a new one. Does anyone have a recommendation of a brand of card I should be looking for? For LAVA stuff, it needs to be at least 8 gigs. Cheers, mwh

12 years, 5 months

How can I contribute to android-ucm project?

by Claude Youn

Dear Mr Kurt Taylor, Hello, I'm Claude Youn, work for InSignal, she made Origen board. I'm so interest your project 'android-ucm', because I have a role on sound of Origen board. And also Mr Bernard Park, who is in Linaro, asked me to support audio and origen board works for linaro. :) After that, I asked to Mr Mark brown, ASoC maintainer, about his tinyhal project status, and he answered me to contect to you. For now, I worked audioHAL of Origen board from alsa HAL, which was ported by windriver guys, with some modifications. And also I ported tinyhal, from Mr Mark Brown's git. :) But it's not enought to be a official one, I think. See below links, - alsa legacy porting based hal http://git.insignal.co.kr/?p=insignal-android/vendor/insignal/hal/alsahw_le… - tinyhal based audio hal http://git.insignal.co.kr/?p=insignal-android/vendor/insignal/hal/tinyhal.g… So, how can I contribute to your project? Can you share your plan to me? with best regards, claude

12 years, 5 months

alloc failed, but?

by Tom Gall

Hi All, I'm stressing a system with apachebench. As one scales up work on a system obviously there's always a point where the wheels fall off, the engine explodes or something else exciting happens. But as Han Solo would say ... "hold together baby....", I'd like to eek out as much as I can. (If you're really interested, here's what I'm up to : http://fullshovel.wordpress.com/ start with part 1) In this case with apachebench, I'm geting the following allocation errors in the kernel and need a little help deciphering. It sure looks like there's plenty of space to swap out however if I have this right, we're getting so much network traffic that the kernel gets inundated and it OOMs in the network stack. I did later try setting sysctl -w vm.min_free_kbytes=32768 but that didn't really seem to help. The much more complete dmesg dump is located at http://people.linaro.org/~tgall/dmesg-dump.txt Thanks in advance for thoughts and advise. [127089.668487] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127089.675994] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127089.683502] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127089.690979] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127089.698455] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127089.705932] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127089.713409] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127089.720886] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127089.728363] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127096.934051] Initial hdmi_get_current_hpd says disconnected [127100.245117] warn_alloc_failed: 52 callbacks suppressed [127100.245117] swapper/0: page allocation failure: order:3, mode:0x20 [127100.245117] [<8001b8d0>] (unwind_backtrace+0x0/0xec) from [<806905d0>] (dump_stack+0x20/0x24) [127100.245544] [<806905d0>] (dump_stack+0x20/0x24) from [<800fe390>] (warn_alloc_failed+0xfc/0x11c) [127100.245544] [<800fe390>] (warn_alloc_failed+0xfc/0x11c) from [<80100f14>] (__alloc_pages_nodemask+0x678/0x7a4) [127100.245666] [<80100f14>] (__alloc_pages_nodemask+0x678/0x7a4) from [<80695270>] (kmem_getpages.isra.35+0x3c/0xc0) [127100.245666] [<80695270>] (kmem_getpages.isra.35+0x3c/0xc0) from [<80695380>] (cache_grow.constprop.37+0x8c/0x1fc) [127100.245666] [<80695380>] (cache_grow.constprop.37+0x8c/0x1fc) from [<8069570c>] (cache_alloc_refill+0x21c/0x274) [127100.245819] [<8069570c>] (cache_alloc_refill+0x21c/0x274) from [<80132dac>] (__kmalloc_track_caller+0xac/0x1b0) [127100.245910] [<80132dac>] (__kmalloc_track_caller+0xac/0x1b0) from [<8057a37c>] (__alloc_skb+0x60/0xfc) [127100.245971] [<8057a37c>] (__alloc_skb+0x60/0xfc) from [<8057a874>] (__netdev_alloc_skb+0x2c/0x54) [127100.245971] [<8057a874>] (__netdev_alloc_skb+0x2c/0x54) from [<8049dbb8>] (rx_submit+0x2c/0x1d4) [127100.245971] [<8049dbb8>] (rx_submit+0x2c/0x1d4) from [<8049e1c0>] (rx_complete+0x1a4/0x1b8) [127100.245971] [<8049e1c0>] (rx_complete+0x1a4/0x1b8) from [<804a5f38>] (usb_hcd_giveback_urb+0xb0/0xfc) [127100.246246] [<804a5f38>] (usb_hcd_giveback_urb+0xb0/0xfc) from [<804b887c>] (ehci_urb_done+0xb8/0xc4) [127100.246246] [<804b887c>] (ehci_urb_done+0xb8/0xc4) from [<804bb240>] (qh_completions+0xc8/0x49c) [127100.246307] [<804bb240>] (qh_completions+0xc8/0x49c) from [<804bdcd0>] (scan_async+0x88/0x154) [127100.246398] [<804bdcd0>] (scan_async+0x88/0x154) from [<804be138>] (ehci_work+0x40/0x98) [127100.246398] [<804be138>] (ehci_work+0x40/0x98) from [<804bf9c4>] (ehci_irq+0x33c/0x3a4) [127100.246459] [<804bf9c4>] (ehci_irq+0x33c/0x3a4) from [<804a53ac>] (usb_hcd_irq+0x40/0x50) [127100.246459] [<804a53ac>] (usb_hcd_irq+0x40/0x50) from [<800bf45c>] (handle_irq_event_percpu+0xc4/0x298) [127100.246459] [<800bf45c>] (handle_irq_event_percpu+0xc4/0x298) from [<800bf67c>] (handle_irq_event+0x4c/0x6c) [127100.246459] [<800bf67c>] (handle_irq_event+0x4c/0x6c) from [<800c23b4>] (handle_fasteoi_irq+0xd8/0x124) [127100.246734] [<800c23b4>] (handle_fasteoi_irq+0xd8/0x124) from [<800bedd0>] (generic_handle_irq+0x30/0x40) [127100.246765] [<800bedd0>] (generic_handle_irq+0x30/0x40) from [<800140c4>] (handle_IRQ+0x88/0xc8) [127100.246826] [<800140c4>] (handle_IRQ+0x88/0xc8) from [<800086d8>] (gic_handle_irq+0x80/0xac) [127100.246917] [<800086d8>] (gic_handle_irq+0x80/0xac) from [<806a91c0>] (__irq_svc+0x40/0x70) [127100.246917] Exception stack(0x80a47bf8 to 0x80a47c40) [127100.246978] 7be0: 0000000d 00002180 [127100.247009] 7c00: 0000000d 00000005 8bb55040 8236d180 00f7a819 81e00d5a 00000068 80c5ee80 [127100.247100] 7c20: 00000002 80a47c5c 80a47c40 80a47c40 805c734c 805c9a70 80070113 ffffffff [127100.247100] [<806a91c0>] (__irq_svc+0x40/0x70) from [<805c9a70>] (tcp_event_data_recv+0x118/0x194) [127100.247161] [<805c9a70>] (tcp_event_data_recv+0x118/0x194) from [<805cc554>] (tcp_data_queue+0x30c/0x998) [127100.247222] [<805cc554>] (tcp_data_queue+0x30c/0x998) from [<805cfa30>] (tcp_rcv_established+0x668/0x73c) [127100.247222] [<805cfa30>] (tcp_rcv_established+0x668/0x73c) from [<805d684c>] (tcp_v4_do_rcv+0x90/0x220) [127100.247222] [<805d684c>] (tcp_v4_do_rcv+0x90/0x220) from [<805d8bac>] (tcp_v4_rcv+0x550/0x928) [127100.247222] [<805d8bac>] (tcp_v4_rcv+0x550/0x928) from [<805b68e0>] (ip_local_deliver_finish+0x1b0/0x370) [127100.247222] [<805b68e0>] (ip_local_deliver_finish+0x1b0/0x370) from [<805b6c30>] (ip_local_deliver+0x98/0xa8) [127100.247222] [<805b6c30>] (ip_local_deliver+0x98/0xa8) from [<805b670c>] (ip_rcv_finish+0x4b8/0x4dc) [127100.247619] [<805b670c>] (ip_rcv_finish+0x4b8/0x4dc) from [<805b6fd4>] (ip_rcv+0x394/0x414) [127100.247619] [<805b6fd4>] (ip_rcv+0x394/0x414) from [<805832e0>] (__netif_receive_skb+0x4dc/0x550) [127100.247741] [<805832e0>] (__netif_receive_skb+0x4dc/0x550) from [<805833ec>] (process_backlog+0x98/0x168) [127100.247741] [<805833ec>] (process_backlog+0x98/0x168) from [<80586674>] (net_rx_action+0xc8/0x31c) [127100.247741] [<80586674>] (net_rx_action+0xc8/0x31c) from [<8004d28c>] (__do_softirq+0x140/0x27c) [127100.247894] [<8004d28c>] (__do_softirq+0x140/0x27c) from [<8004d864>] (irq_exit+0x58/0xac) [127100.247955] [<8004d864>] (irq_exit+0x58/0xac) from [<800140c8>] (handle_IRQ+0x8c/0xc8) [127100.248016] [<800140c8>] (handle_IRQ+0x8c/0xc8) from [<800086d8>] (gic_handle_irq+0x80/0xac) [127100.248077] [<800086d8>] (gic_handle_irq+0x80/0xac) from [<806a91c0>] (__irq_svc+0x40/0x70) [127100.248107] Exception stack(0x80a47f38 to 0x80a47f80) [127100.248107] 7f20: 00000003 00000000 [127100.248168] 7f40: 00000000 8002ce7c 80a46000 80a4e3e0 806b3f50 80a4e290 80ab8988 412fc09a [127100.248199] 7f60: 00000000 80a47f8c 80a47f90 80a47f80 8002b340 8002cea4 60070113 ffffffff [127100.248260] [<806a91c0>] (__irq_svc+0x40/0x70) from [<8002cea4>] (omap_default_idle+0x28/0x2c) [127100.248352] [<8002cea4>] (omap_default_idle+0x28/0x2c) from [<80014630>] (cpu_idle+0x9c/0x104) [127100.248413] [<80014630>] (cpu_idle+0x9c/0x104) from [<8067d648>] (rest_init+0x8c/0xa4) [127100.248474] [<8067d648>] (rest_init+0x8c/0xa4) from [<809d98a8>] (start_kernel+0x2b8/0x314) [127100.248474] Mem-info: [127100.248535] Normal per-cpu: [127100.248535] CPU 0: hi: 186, btch: 31 usd: 181 [127100.248565] CPU 1: hi: 186, btch: 31 usd: 70 [127100.248596] active_anon:21239 inactive_anon:6225 isolated_anon:0 [127100.248657] active_file:52057 inactive_file:111715 isolated_file:0 [127100.248657] unevictable:0 dirty:180 writeback:0 unstable:0 [127100.248687] free:38073 slab_reclaimable:6423 slab_unreclaimable:4248 [127100.248687] mapped:5616 shmem:4706 pagetables:393 bounce:0 [127100.248779] Normal free:152292kB min:8192kB low:10240kB high:12288kB active_anon:84956kB inactive_anon:24900kB active_file:208228kB inactive_file:446860kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:1039360kB mlocked:0kB dirty:720kB writeback:0kB mapped:22464kB shmem:18824kB slab_reclaimable:25692kB slab_unreclaimable:16992kB kernel_stack:1056kB pagetables:1572kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no [127100.248870] lowmem_reserve[]: 0 0 0 [127100.248870] Normal: 4855*4kB 4831*8kB 4221*16kB 710*32kB 61*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 152228kB [127100.249053] 168490 total pagecache pages [127100.249053] 0 pages in swap cache [127100.249084] Swap cache stats: add 0, delete 0, find 0/0 [127100.249114] Free swap = 1847468kB [127100.249114] Total swap = 1847468kB [127100.291046] 262144 pages of RAM [127100.291076] 38638 free pages [127100.291076] 18477 reserved pages [127100.291107] 10718 slab pages [127100.291137] 158595 pages shared [127100.291137] 0 pages swap cached [127100.291320] swapper/0: page allocation failure: order:3, mode:0x20 [127100.291412] [<8001b8d0>] (unwind_backtrace+0x0/0xec) from [<806905d0>] (dump_stack+0x20/0x24) [127100.291503] [<806905d0>] (dump_stack+0x20/0x24) from [<800fe390>] (warn_alloc_failed+0xfc/0x11c) [127100.291564] [<800fe390>] (warn_alloc_failed+0xfc/0x11c) from [<80100f14>] (__alloc_pages_nodemask+0x678/0x7a4) [127100.291625] [<80100f14>] (__alloc_pages_nodemask+0x678/0x7a4) from [<80695270>] (kmem_getpages.isra.35+0x3c/0xc0) [127100.291656] [<80695270>] (kmem_getpages.isra.35+0x3c/0xc0) from [<80695380>] (cache_grow.constprop.37+0x8c/0x1fc) [127100.291717] [<80695380>] (cache_grow.constprop.37+0x8c/0x1fc) from [<8069570c>] (cache_alloc_refill+0x21c/0x274) [127100.291778] [<8069570c>] (cache_alloc_refill+0x21c/0x274) from [<80132dac>] (__kmalloc_track_caller+0xac/0x1b0) [127100.291839] [<80132dac>] (__kmalloc_track_caller+0xac/0x1b0) from [<8057a37c>] (__alloc_skb+0x60/0xfc) [127100.291900] [<8057a37c>] (__alloc_skb+0x60/0xfc) from [<8057a874>] (__netdev_alloc_skb+0x2c/0x54) [127100.291961] [<8057a874>] (__netdev_alloc_skb+0x2c/0x54) from [<8049dbb8>] (rx_submit+0x2c/0x1d4) [127100.292022] [<8049dbb8>] (rx_submit+0x2c/0x1d4) from [<8049e1c0>] (rx_complete+0x1a4/0x1b8) [127100.292083] [<8049e1c0>] (rx_complete+0x1a4/0x1b8) from [<804a5f38>] (usb_hcd_giveback_urb+0xb0/0xfc) [127100.292144] [<804a5f38>] (usb_hcd_giveback_urb+0xb0/0xfc) from [<804b887c>] (ehci_urb_done+0xb8/0xc4) [127100.292205] [<804b887c>] (ehci_urb_done+0xb8/0xc4) from [<804bb240>] (qh_completions+0xc8/0x49c) [127100.292266] [<804bb240>] (qh_completions+0xc8/0x49c) from [<804bdcd0>] (scan_async+0x88/0x154) [127100.292297] [<804bdcd0>] (scan_async+0x88/0x154) from [<804be138>] (ehci_work+0x40/0x98) [127100.292358] [<804be138>] (ehci_work+0x40/0x98) from [<804bf9c4>] (ehci_irq+0x33c/0x3a4) [127100.292419] [<804bf9c4>] (ehci_irq+0x33c/0x3a4) from [<804a53ac>] (usb_hcd_irq+0x40/0x50) [127100.292480] [<804a53ac>] (usb_hcd_irq+0x40/0x50) from [<800bf45c>] (handle_irq_event_percpu+0xc4/0x298) [127100.292541] [<800bf45c>] (handle_irq_event_percpu+0xc4/0x298) from [<800bf67c>] (handle_irq_event+0x4c/0x6c) [127100.292572] [<800bf67c>] (handle_irq_event+0x4c/0x6c) from [<800c23b4>] (handle_fasteoi_irq+0xd8/0x124) [127100.292633] [<800c23b4>] (handle_fasteoi_irq+0xd8/0x124) from [<800bedd0>] (generic_handle_irq+0x30/0x40) [127100.292724] [<800bedd0>] (generic_handle_irq+0x30/0x40) from [<800140c4>] (handle_IRQ+0x88/0xc8) [127100.292755] [<800140c4>] (handle_IRQ+0x88/0xc8) from [<800086d8>] (gic_handle_irq+0x80/0xac) [127100.292816] [<800086d8>] (gic_handle_irq+0x80/0xac) from [<806a91c0>] (__irq_svc+0x40/0x70) [127100.292846] Exception stack(0x80a47bf8 to 0x80a47c40) [127100.292877] 7be0: 0000000d 00002180 [127100.292938] 7c00: 0000000d 00000005 8bb55040 8236d180 00f7a819 81e00d5a 00000068 80c5ee80 [127100.292968] 7c20: 00000002 80a47c5c 80a47c40 80a47c40 805c734c 805c9a70 80070113 ffffffff [127100.293029] [<806a91c0>] (__irq_svc+0x40/0x70) from [<805c9a70>] (tcp_event_data_recv+0x118/0x194) [127100.293090] [<805c9a70>] (tcp_event_data_recv+0x118/0x194) from [<805cc554>] (tcp_data_queue+0x30c/0x998) [127100.293151] [<805cc554>] (tcp_data_queue+0x30c/0x998) from [<805cfa30>] (tcp_rcv_established+0x668/0x73c) [127100.293212] [<805cfa30>] (tcp_rcv_established+0x668/0x73c) from [<805d684c>] (tcp_v4_do_rcv+0x90/0x220) [127100.293273] [<805d684c>] (tcp_v4_do_rcv+0x90/0x220) from [<805d8bac>] (tcp_v4_rcv+0x550/0x928) [127100.293334] [<805d8bac>] (tcp_v4_rcv+0x550/0x928) from [<805b68e0>] (ip_local_deliver_finish+0x1b0/0x370) [127100.293365] [<805b68e0>] (ip_local_deliver_finish+0x1b0/0x370) from [<805b6c30>] (ip_local_deliver+0x98/0xa8) [127100.293426] [<805b6c30>] (ip_local_deliver+0x98/0xa8) from [<805b670c>] (ip_rcv_finish+0x4b8/0x4dc) [127100.293487] [<805b670c>] (ip_rcv_finish+0x4b8/0x4dc) from [<805b6fd4>] (ip_rcv+0x394/0x414) [127100.293548] [<805b6fd4>] (ip_rcv+0x394/0x414) from [<805832e0>] (__netif_receive_skb+0x4dc/0x550) [127100.293609] [<805832e0>] (__netif_receive_skb+0x4dc/0x550) from [<805833ec>] (process_backlog+0x98/0x168) [127100.293640] [<805833ec>] (process_backlog+0x98/0x168) from [<80586674>] (net_rx_action+0xc8/0x31c) [127100.293701] [<80586674>] (net_rx_action+0xc8/0x31c) from [<8004d28c>] (__do_softirq+0x140/0x27c) [127100.293762] [<8004d28c>] (__do_softirq+0x140/0x27c) from [<8004d864>] (irq_exit+0x58/0xac) [127100.293823] [<8004d864>] (irq_exit+0x58/0xac) from [<800140c8>] (handle_IRQ+0x8c/0xc8) [127100.293884] [<800140c8>] (handle_IRQ+0x8c/0xc8) from [<800086d8>] (gic_handle_irq+0x80/0xac) [127100.293914] [<800086d8>] (gic_handle_irq+0x80/0xac) from [<806a91c0>] (__irq_svc+0x40/0x70) [127100.293945] Exception stack(0x80a47f38 to 0x80a47f80) [127100.293975] 7f20: 00000003 00000000 [127100.294036] 7f40: 00000000 8002ce7c 80a46000 80a4e3e0 806b3f50 80a4e290 80ab8988 412fc09a [127100.294067] 7f60: 00000000 80a47f8c 80a47f90 80a47f80 8002b340 8002cea4 60070113 ffffffff [127100.294128] [<806a91c0>] (__irq_svc+0x40/0x70) from [<8002cea4>] (omap_default_idle+0x28/0x2c) [127100.294189] [<8002cea4>] (omap_default_idle+0x28/0x2c) from [<80014630>] (cpu_idle+0x9c/0x104) [127100.294250] [<80014630>] (cpu_idle+0x9c/0x104) from [<8067d648>] (rest_init+0x8c/0xa4) [127100.294311] [<8067d648>] (rest_init+0x8c/0xa4) from [<809d98a8>] (start_kernel+0x2b8/0x314) [127100.294342] Mem-info: [127100.294342] Normal per-cpu: [127100.294372] CPU 0: hi: 186, btch: 31 usd: 181 [127100.294403] CPU 1: hi: 186, btch: 31 usd: 54 [127100.294464] active_anon:21239 inactive_anon:6225 isolated_anon:0 [127100.294464] active_file:52057 inactive_file:111715 isolated_file:0 [127100.294494] unevictable:0 dirty:180 writeback:0 unstable:0 [127100.294494] free:38073 slab_reclaimable:6423 slab_unreclaimable:4265 [127100.294525] mapped:5616 shmem:4706 pagetables:393 bounce:0 [127100.294586] Normal free:152292kB min:8192kB low:10240kB high:12288kB active_anon:84956kB inactive_anon:24900kB active_file:208228kB inactive_file:446860kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:1039360kB mlocked:0kB dirty:720kB writeback:0kB mapped:22464kB shmem:18824kB slab_reclaimable:25692kB slab_unreclaimable:17060kB kernel_stack:1056kB pagetables:1572kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no [127100.294677] lowmem_reserve[]: 0 0 0 [127100.294738] Normal: 4855*4kB 4831*8kB 4221*16kB 710*32kB 61*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 152228kB [127100.294860] 168490 total pagecache pages [127100.294860] 0 pages in swap cache [127100.294891] Swap cache stats: add 0, delete 0, find 0/0 [127100.294921] Free swap = 1847468kB [127100.294921] Total swap = 1847468kB [127100.336883] 262144 pages of RAM [127100.336883] 38638 free pages [127100.336914] 18477 reserved pages [127100.336944] 10718 slab pages [127100.336944] 158595 pages shared [127100.336975] 0 pages swap cached <snip> [127100.664459] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127100.672088] swapper/0: page allocation failure: order:3, mode:0x20 [127100.672149] [<8001b8d0>] (unwind_backtrace+0x0/0xec) from [<806905d0>] (dump_stack+0x20/0x24) [127100.672210] [<806905d0>] (dump_stack+0x20/0x24) from [<800fe390>] (warn_alloc_failed+0xfc/0x11c) [127100.672210] [<800fe390>] (warn_alloc_failed+0xfc/0x11c) from [<80100f14>] (__alloc_pages_nodemask+0x678/0x7a4) [127100.672363] [<80100f14>] (__alloc_pages_nodemask+0x678/0x7a4) from [<80695270>] (kmem_getpages.isra.35+0x3c/0xc0) [127100.672393] [<80695270>] (kmem_getpages.isra.35+0x3c/0xc0) from [<80695380>] (cache_grow.constprop.37+0x8c/0x1fc) [127100.672485] [<80695380>] (cache_grow.constprop.37+0x8c/0x1fc) from [<8069570c>] (cache_alloc_refill+0x21c/0x274) [127100.672485] [<8069570c>] (cache_alloc_refill+0x21c/0x274) from [<80132dac>] (__kmalloc_track_caller+0xac/0x1b0) [127100.672576] [<80132dac>] (__kmalloc_track_caller+0xac/0x1b0) from [<8057a37c>] (__alloc_skb+0x60/0xfc) [127100.672637] [<8057a37c>] (__alloc_skb+0x60/0xfc) from [<8057a874>] (__netdev_alloc_skb+0x2c/0x54) [127100.672698] [<8057a874>] (__netdev_alloc_skb+0x2c/0x54) from [<8049dbb8>] (rx_submit+0x2c/0x1d4) [127100.672821] [<8049dbb8>] (rx_submit+0x2c/0x1d4) from [<8049e89c>] (usbnet_bh+0x1b8/0x258) [127100.672821] [<8049e89c>] (usbnet_bh+0x1b8/0x258) from [<8004cbc4>] (tasklet_action+0xb0/0x1ac) [127100.672821] [<8004cbc4>] (tasklet_action+0xb0/0x1ac) from [<8004d28c>] (__do_softirq+0x140/0x27c) [127100.672973] [<8004d28c>] (__do_softirq+0x140/0x27c) from [<8004d864>] (irq_exit+0x58/0xac) [127100.673034] [<8004d864>] (irq_exit+0x58/0xac) from [<800140c8>] (handle_IRQ+0x8c/0xc8) [127100.673095] [<800140c8>] (handle_IRQ+0x8c/0xc8) from [<800086d8>] (gic_handle_irq+0x80/0xac) [127100.673156] [<800086d8>] (gic_handle_irq+0x80/0xac) from [<806a91c0>] (__irq_svc+0x40/0x70) [127100.673187] Exception stack(0x80a47f38 to 0x80a47f80) [127100.673187] 7f20: 00000003 00000000 [127100.673248] 7f40: 00000000 8002ce7c 80a46000 80a4e3e0 806b3f50 80a4e290 80ab8988 412fc09a [127100.673278] 7f60: 00000000 80a47f8c 80a47f90 80a47f80 8002b340 8002cea4 60070113 ffffffff [127100.673278] [<806a91c0>] (__irq_svc+0x40/0x70) from [<8002cea4>] (omap_default_idle+0x28/0x2c) [127100.673431] [<8002cea4>] (omap_default_idle+0x28/0x2c) from [<80014630>] (cpu_idle+0x9c/0x104) [127100.673492] [<80014630>] (cpu_idle+0x9c/0x104) from [<8067d648>] (rest_init+0x8c/0xa4) [127100.673553] [<8067d648>] (rest_init+0x8c/0xa4) from [<809d98a8>] (start_kernel+0x2b8/0x314) [127100.673553] Mem-info: [127100.673614] Normal per-cpu: [127100.673614] CPU 0: hi: 186, btch: 31 usd: 181 [127100.673614] CPU 1: hi: 186, btch: 31 usd: 45 [127100.673675] active_anon:21307 inactive_anon:6225 isolated_anon:0 [127100.673736] active_file:52057 inactive_file:111732 isolated_file:0 [127100.673736] unevictable:0 dirty:205 writeback:0 unstable:0 [127100.673767] free:37608 slab_reclaimable:6423 slab_unreclaimable:4639 [127100.673767] mapped:5616 shmem:4706 pagetables:393 bounce:0 [127100.673828] Normal free:150432kB min:8192kB low:10240kB high:12288kB active_anon:85228kB inactive_anon:24900kB active_file:208228kB inactive_file:446928kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:1039360kB mlocked:0kB dirty:820kB writeback:0kB mapped:22464kB shmem:18824kB slab_reclaimable:25692kB slab_unreclaimable:18556kB kernel_stack:1056kB pagetables:1572kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no [127100.673889] lowmem_reserve[]: 0 0 0 [127100.673889] Normal: 4670*4kB 4691*8kB 4221*16kB 710*32kB 61*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 150368kB [127100.674102] 168515 total pagecache pages [127100.674133] 0 pages in swap cache [127100.674163] Swap cache stats: add 0, delete 0, find 0/0 [127100.674163] Free swap = 1847468kB [127100.674163] Total swap = 1847468kB [127100.716339] 262144 pages of RAM [127100.716369] 38162 free pages [127100.716369] 18477 reserved pages [127100.716400] 11086 slab pages [127100.716430] 158642 pages shared [127100.716430] 0 pages swap cached [127100.716674] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127100.724212] swapper/0: page allocation failure: order:3, mode:0x20 [127100.724304] [<8001b8d0>] (unwind_backtrace+0x0/0xec) from [<806905d0>] (dump_stack+0x20/0x24) [127100.724395] [<806905d0>] (dump_stack+0x20/0x24) from [<800fe390>] (warn_alloc_failed+0xfc/0x11c) [127100.724395] [<800fe390>] (warn_alloc_failed+0xfc/0x11c) from [<80100f14>] (__alloc_pages_nodemask+0x678/0x7a4) [127100.724395] [<80100f14>] (__alloc_pages_nodemask+0x678/0x7a4) from [<80695270>] (kmem_getpages.isra.35+0x3c/0xc0) [127100.724395] [<80695270>] (kmem_getpages.isra.35+0x3c/0xc0) from [<80695380>] (cache_grow.constprop.37+0x8c/0x1fc) [127100.724395] [<80695380>] (cache_grow.constprop.37+0x8c/0x1fc) from [<8069570c>] (cache_alloc_refill+0x21c/0x274) [127100.724395] [<8069570c>] (cache_alloc_refill+0x21c/0x274) from [<80132dac>] (__kmalloc_track_caller+0xac/0x1b0) [127100.724395] [<80132dac>] (__kmalloc_track_caller+0xac/0x1b0) from [<8057a37c>] (__alloc_skb+0x60/0xfc) [127100.724761] [<8057a37c>] (__alloc_skb+0x60/0xfc) from [<8057a874>] (__netdev_alloc_skb+0x2c/0x54) [127100.724822] [<8057a874>] (__netdev_alloc_skb+0x2c/0x54) from [<8049dbb8>] (rx_submit+0x2c/0x1d4) [127100.724822] [<8049dbb8>] (rx_submit+0x2c/0x1d4) from [<8049e89c>] (usbnet_bh+0x1b8/0x258) [127100.724822] [<8049e89c>] (usbnet_bh+0x1b8/0x258) from [<8004cbc4>] (tasklet_action+0xb0/0x1ac) [127100.724822] [<8004cbc4>] (tasklet_action+0xb0/0x1ac) from [<8004d28c>] (__do_softirq+0x140/0x27c) [127100.724822] [<8004d28c>] (__do_softirq+0x140/0x27c) from [<8004d864>] (irq_exit+0x58/0xac) [127100.724822] [<8004d864>] (irq_exit+0x58/0xac) from [<800140c8>] (handle_IRQ+0x8c/0xc8) [127100.725219] [<800140c8>] (handle_IRQ+0x8c/0xc8) from [<800086d8>] (gic_handle_irq+0x80/0xac) [127100.725280] [<800086d8>] (gic_handle_irq+0x80/0xac) from [<806a91c0>] (__irq_svc+0x40/0x70) [127100.725280] Exception stack(0x80a47f38 to 0x80a47f80) [127100.725341] 7f20: 00000003 00000000 [127100.725402] 7f40: 00000000 8002ce7c 80a46000 80a4e3e0 806b3f50 80a4e290 80ab8988 412fc09a [127100.725433] 7f60: 00000000 80a47f8c 80a47f90 80a47f80 8002b340 8002cea4 60070113 ffffffff [127100.725433] [<806a91c0>] (__irq_svc+0x40/0x70) from [<8002cea4>] (omap_default_idle+0x28/0x2c) [127100.725555] [<8002cea4>] (omap_default_idle+0x28/0x2c) from [<80014630>] (cpu_idle+0x9c/0x104) [127100.725616] [<80014630>] (cpu_idle+0x9c/0x104) from [<8067d648>] (rest_init+0x8c/0xa4) [127100.725677] [<8067d648>] (rest_init+0x8c/0xa4) from [<809d98a8>] (start_kernel+0x2b8/0x314) [127100.725677] Mem-info: [127100.725677] Normal per-cpu: [127100.725738] CPU 0: hi: 186, btch: 31 usd: 181 [127100.725769] CPU 1: hi: 186, btch: 31 usd: 72 [127100.725830] active_anon:21307 inactive_anon:6225 isolated_anon:0 [127100.725860] active_file:52057 inactive_file:111732 isolated_file:0 [127100.725860] unevictable:0 dirty:205 writeback:0 unstable:0 [127100.725860] free:37577 slab_reclaimable:6423 slab_unreclaimable:4639 [127100.725891] mapped:5616 shmem:4706 pagetables:393 bounce:0 [127100.725982] Normal free:150308kB min:8192kB low:10240kB high:12288kB active_anon:85228kB inactive_anon:24900kB active_file:208228kB inactive_file:446928kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:1039360kB mlocked:0kB dirty:820kB writeback:0kB mapped:22464kB shmem:18824kB slab_reclaimable:25692kB slab_unreclaimable:18556kB kernel_stack:1056kB pagetables:1572kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no [127100.726043] lowmem_reserve[]: 0 0 0 [127100.726104] Normal: 4639*4kB 4691*8kB 4221*16kB 710*32kB 61*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 150244kB [127100.726226] 168515 total pagecache pages [127100.726226] 0 pages in swap cache [127100.726257] Swap cache stats: add 0, delete 0, find 0/0 [127100.726287] Free swap = 1847468kB [127100.726318] Total swap = 1847468kB [127100.767608] 262144 pages of RAM [127100.767639] 38160 free pages [127100.767669] 18477 reserved pages [127100.767669] 11086 slab pages [127100.767700] 158646 pages shared [127100.767700] 0 pages swap cached [127100.767944] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127100.775512] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127100.783050] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127100.790588] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127100.798065] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped [127100.805541] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped -- Regards, Tom "Where's the kaboom!? There was supposed to be an earth-shattering kaboom!" Marvin Martian Linaro.org │ Open source software for ARM SoCs h) tom.gall att linaro.org w) tom_gall att vnet.ibm.com h) tom_gall att mac.com

12 years, 5 months

[PATCH v6] ARM: imx: Add basic imx6q thermal driver

by Robert Lee

Based on v3.5-rc4 This patch add basic thermal driver support for the imx6q platform. This was implemented by hooking into the linux thermal framework which provides sysfs temperature readings and other data and a method to shutdown the system if it gets too hot. A major change in this revision is that cooling device implementation was removed as it is dependent on cpufreq and no imx6q cpufreq exist upstream and there is no recent activity on efforts to do so. Other changes in v6. 1. Fixed several problems that were pointed out in v5 review. 2. Re-worked the sensor reading code to better handle suspend/resume case 3. Made various naming changes to make it more specific to the anatop peripheral instead of the imx6q platform. This should reduce the changes required to use this driver in future platforms. 4. Removed test support for imx6q parts without calibrated temperature sensor fuses. These devices will simply exit thermal driver initialization with a warning message. 5. Made the thermal driver and the anatopmfd driver defaulted to be enabled in the Kconfig files which will still dependend on imx6q_soc being enabled. Not sure if this is the right place to do this or if it should be done in the defconfig file. Known future work will be to add back in cooling device support once cpufreq is supported. Improvements to coincide with that work may involve adding the active cooling trip points into device tree for hardware application specific settings. link to previous submissions: v5" https://lkml.org/lkml/2012/6/20/57 v4: http://comments.gmane.org/gmane.linux.acpi.devel/51779 v3: http://www.spinics.net/lists/arm-kernel/msg155955.html v2: http://www.spinics.net/lists/arm-kernel/msg155790.html v1: http://www.spinics.net/lists/arm-kernel/msg155111.html Changes in v5: 1. Modified to use anatop mfd driver for accessing anatop registers 2. Made necessary changes to work with latest generic CPU cooling code. 3. Added Config changes and functionality to allow testing on parts without without programmed temperature sensor calibration values. 4. General cleanup and addition of comments. Changes in v4: 1. Removed bad suspend/resume assignment into thermal class. After further examination and discussion with SoC designers, a sequence is now used for making measurements that is is unaffected by system suspendresumes. Temp Sensor automatically powers off in hardware during the low power mode caused by a system suspend. 2. Moved some structures from static to dynamic allocation. 3. Added some noise handling to temperatuer sensor readings. Changes in v3: 1. Fixed the various issues pointed out in v2 2. Made other code cleanup and a bit of re-organizing 3. Removed unecessary platform driver and device. Changes in v2: 1. Cleaned up some style issues pointed out in v1 2. Made various other code cleanup and re-organizing 3. Added temperature sensor calibration 4. Created platform driver and device to hook into pm suspend. Performed some basic testing to ensure proper cooling operating. If you want to test this, full testing requires imx6q cpufreq implementation (not yet in v3.5). Robert Lee (1): ARM: imx: Add basic imx6q thermal driver arch/arm/boot/dts/imx6q.dtsi | 5 + drivers/mfd/Kconfig | 1 + drivers/thermal/Kconfig | 9 + drivers/thermal/Makefile | 1 + drivers/thermal/imx_anatop_thermal.c | 465 ++++++++++++++++++++++++++++++++++ 5 files changed, 481 insertions(+) create mode 100644 drivers/thermal/imx_anatop_thermal.c -- 1.7.10

12 years, 5 months

[PATCH] perf sched replay: fix event lookup

by Dmitry Antipov

Use new function trace_find_event_by_name to lookup events before looking through /sys files. This helps 'perf sched replay' to map event names to IDs correctly when processing perf.data recorded on another machine. Signed-off-by: Dmitry Antipov <dmitry.antipov(a)linaro.org> --- tools/perf/util/evlist.c | 18 ++++++++++++++++-- tools/perf/util/trace-event-parse.c | 4 ++++ tools/perf/util/trace-event.h | 1 + 3 files changed, 21 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 4ac5f5a..7ebb9c5 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -17,6 +17,7 @@ #include <unistd.h> #include "parse-events.h" +#include "trace-event.h" #include <sys/mman.h> @@ -231,12 +232,25 @@ int perf_evlist__set_tracepoints_handlers(struct perf_evlist *evlist, const struct perf_evsel_str_handler *assocs, size_t nr_assocs) { + struct event_format *event; struct perf_evsel *evsel; + char *p, *sys, *name; int err; - size_t i; + size_t i, off; for (i = 0; i < nr_assocs; i++) { - err = trace_event__id(assocs[i].name); + err = -ENOENT; + p = strchr(assocs[i].name, ':'); + if (!p) + goto out; + off = p - assocs[i].name; + sys = malloc(off + 1); + memcpy(sys, assocs[i].name, off); + sys[off] = '\0'; + name = p + 1; + event = trace_find_event_by_name(sys, name); + err = event ? event->id : trace_event__id(assocs[i].name); + free(sys); if (err < 0) goto out; diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c index df2fddb..44cbb40 100644 --- a/tools/perf/util/trace-event-parse.c +++ b/tools/perf/util/trace-event-parse.c @@ -176,6 +176,10 @@ struct event_format *trace_find_event(int type) return pevent_find_event(pevent, type); } +struct event_format *trace_find_event_by_name(const char *sys, const char *name) +{ + return pevent_find_event_by_name(pevent, sys, name); +} void print_trace_event(int cpu, void *data, int size) { diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h index 639852a..66f83a0 100644 --- a/tools/perf/util/trace-event.h +++ b/tools/perf/util/trace-event.h @@ -40,6 +40,7 @@ int parse_event_file(char *buf, unsigned long size, char *sys); struct pevent_record *trace_peek_data(int cpu); struct event_format *trace_find_event(int type); +struct event_format *trace_find_event_by_name(const char *sys, const char *name); unsigned long long raw_field_value(struct event_format *event, const char *name, void *data); -- 1.7.7.6

12 years, 5 months

Qemu networking

by Simone Ferlin-Oliveira

I want to make network work with Qemu using the tap device. I tried this out using a debian-wheezy ( http://elinux.org/BeagleBoardDebian#Debian_Wheezy_snapshot) and Linaro (nano) (http://www.linaro.org/downloads/1203) for the beagleboard and following some instructions online to set up the tap device. In both cases it did not work and I only see an usb0 device set up but not configured/linked. The eth0 fails while booting. Debugging Qemu while loading I found the following problem. Could you help me with that? 1. tap0 device already set up: 2. Command line: sudo qemu-system-arm -M beagle -m 512 -drive file=beagle-wheezy.img,if=sd,cache=writeback -clock unix -netdev tap,id=mynet,ifname=tap0,script=no -usb -device usb-net,netdev=mynet -serial stdio 3. Debugging Qemu: Cause of crash: s->dev.config IS NULL Program terminated with signal 11, Segmentation fault. #0 0xb74af3f1 in is_rndis (s=0xb9c73c20) at /home/sferlin/qemu-linaro-1.1.0-2012.06/hw/usb/dev-network.c:650 650 return s->dev.config->bConfigurationValue == DEV_RNDIS_CONFIG_VALUE; (gdb) up #1 0xb74b0c24 in usbnet_can_receive (nc=0xb9c763c8) at /home/sferlin/qemu-linaro-1.1.0-2012.06/hw/usb/dev-network.c:1292 1292 if (is_rndis(s) && s->rndis_state != RNDIS_DATA_INITIALIZED) { (gdb) up #2 0xb741bc48 in qemu_can_send_packet (sender=0xb9bf4d20) at net.c:367 367 !sender->peer->info->can_receive(sender->peer)) { (gdb) up #3 0xb7423b4b in tap_can_send (opaque=0xb9bf4d20) at net/tap.c:175 175 return qemu_can_send_packet(&s->nc); (gdb) up #4 0xb738b1b5 in qemu_iohandler_fill (pnfds=0xb7bc3f00, readfds=0xb7bc3d80, writefds=0xb7bc3e00, xfds=0xb7bc3e80) at iohandler.c:101 101 ioh->fd_read_poll(ioh->opaque) != 0)) {

12 years, 5 months

Android Platform Team 2012/6/27 Agenda Posted

by Zach Pfeffer

See: https://wiki.linaro.org/Platform/Android/Meetings/2012-06-27 Please feel free to add to it. Android team, Please list your status. See everyone tomorrow on #linaro-meeting at 14:00 UTC (8 AM Texas time). We've got some cool stuff to go over. Come, enjoy! -- Zach Pfeffer Android Platform Team Lead, Linaro Platform Teams Linaro.org | Open source software for ARM SoCs Follow Linaro: http://www.facebook.com/pages/Linaro http://twitter.com/#!/linaroorg - http://www.linaro.org/linaro-blog

12 years, 5 months

howto turn power management etc off?

by Tom Gall

Hi All, I've been mucking around a bit with linaro server kinds of things. I remember from the last connect Michael Hope had a bit of a checklist before he would collect data. I'd like to make sure I'm getting all I can out of the board. One of the elements of the list was turning off power management. With a little light searching I didn't see anything. More generally, it does seem like a wiki page with a pre-benchmark checklist with things to check/do would be of value. Thanks! -- Regards, Tom "Where's the kaboom!? There was supposed to be an earth-shattering kaboom!" Marvin Martian Linaro.org │ Open source software for ARM SoCs h) tom.gall att linaro.org w) tom_gall att vnet.ibm.com h) tom_gall att mac.com

12 years, 5 months

[PATCH] [CPUFREQ] VCPUFREQ: HR timer based generic cycle stealer

by Pantelis Antoniou

It turns out that hr timers have a nice propery always been executed on the cpu started on. So it is possible to have a generic bigLITTLE simulator based on generic code. Many thanks to Paul E. McKenney that pointed this out. --- drivers/cpufreq/Kconfig | 4 + drivers/cpufreq/Makefile | 1 + drivers/cpufreq/vcpufreq-hrtimer.c | 211 ++++++++++++++++++++++++++++++++++++ 3 files changed, 216 insertions(+), 0 deletions(-) create mode 100644 drivers/cpufreq/vcpufreq-hrtimer.c diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index 1fef0ad..3fa3523 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -211,6 +211,10 @@ if VCPUFREQ choice prompt "VCPUFREQ Platform glue Layer" +config VCPUFREQ_HRTIMER + bool "HRTIMER based VCPUFREQ driver" + depends on HIGH_RES_TIMERS + config VCPUFREQ_OMAP2PLUS bool "OMAP VCPUFREQ driver" depends on ARCH_OMAP2PLUS diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index 97d3011..128ea25 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -57,3 +57,4 @@ obj-$(CONFIG_CPU_FREQ_MAPLE) += maple-cpufreq.o # Virtual driver obj-$(CONFIG_VCPUFREQ) += vcpufreq.o obj-$(CONFIG_VCPUFREQ_OMAP2PLUS) += vcpufreq-omap.o +obj-$(CONFIG_VCPUFREQ_HRTIMER) += vcpufreq-hrtimer.o diff --git a/drivers/cpufreq/vcpufreq-hrtimer.c b/drivers/cpufreq/vcpufreq-hrtimer.c new file mode 100644 index 0000000..98616a9 --- /dev/null +++ b/drivers/cpufreq/vcpufreq-hrtimer.c @@ -0,0 +1,211 @@ +/* + * Copyright 2012 Pantelis Antoniou <panto(a)antoniou-consulting.com> + * + * Virtual CPUFreq glue driver for OMAP2PLUS + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#define pr_fmt(fmt) "cpufreq: " fmt + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/cpufreq.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/math64.h> +#include <linux/delay.h> + +#include <asm/smp_plat.h> +#include <asm/cpu.h> +#include <linux/hrtimer.h> + +#include "vcpufreq.h" + +struct hrtimer_info { + unsigned int cpu; + struct hrtimer hrtimer; + ktime_t interval; + unsigned int irq; + uint64_t counter; + unsigned int timer_rate; + unsigned int hogtime; +}; + +static DEFINE_PER_CPU(struct hrtimer_info, hr_timer); + +static enum hrtimer_restart vcpufreq_hrtimer_handler(struct hrtimer *hrtimer) +{ + struct hrtimer_info __percpu *hti = container_of(hrtimer, struct hrtimer_info, hrtimer); + + BUG_ON(hti == NULL); + + /* we rely on being executed on the proper CPU */ + BUG_ON(hti->cpu != smp_processor_id()); + + hti->counter++; + + /* + * udelay is not always accurate for this; + * unfortunately that is all we have + */ + udelay(hti->hogtime); + + hrtimer_forward_now(hrtimer, hti->interval); + + return HRTIMER_RESTART; +} + +struct vpcufreq_hr_timer_set_freq_info { + unsigned int cpu; + unsigned int new_freq; + unsigned int old_freq; + int ret; +}; + +static void hr_timer_glue_set_freq(void *data) +{ + struct vpcufreq_hr_timer_set_freq_info *info = data; + struct hrtimer_info __percpu *hti; + int ret = 0; + unsigned int hog_timer_rate; + unsigned int freq = vcpufreq_get_maxspeed(); + unsigned int hogtime = vcpufreq_get_hogtime(); + u32 div, rem; + + BUG_ON(smp_processor_id() != info->cpu); + + hti = &per_cpu(hr_timer, info->cpu); + + /* should never happen; checked before */ + BUG_ON(info->new_freq == info->old_freq); + + /* max freq; stop the timer */ + if (info->new_freq == freq) { + pr_debug("#%d: shut down timer\n", info->cpu); + /* no error */ + ret = 0; + goto hr_stop_timer; + + } + + /* timer was stopped, we should start it */ + if (info->old_freq != freq) + hrtimer_cancel(&hti->hrtimer); + + hog_timer_rate = div_u64((u64)(freq - info->new_freq) * 1000000, freq * hogtime); + pr_debug("#%d: hog timer rate = %u\n", info->cpu, hog_timer_rate); + + div = div_u64_rem(1000000000 / hog_timer_rate, 1000000000, &rem); + hti->interval = ktime_set(div, rem); + hti->hogtime = hogtime; + + pr_debug("#%d: internal set to %usec %unsec\n", info->cpu, div, rem); + + /* timer bound to this CPU please */ + ret = hrtimer_start(&hti->hrtimer, hti->interval, HRTIMER_MODE_PINNED); + if (ret != 0) { + pr_err("#%d: failed to start hrtimer (%d)\n", info->cpu, ret); + goto hr_stop_timer; + } + + pr_debug("#%d: setting freq to %u\n", info->cpu, info->new_freq); + + vcpufreq_set_speed(info->cpu, info->new_freq); + ret = 0; + goto out; + +hr_stop_timer: + /* clear everything */ + + hrtimer_cancel(&hti->hrtimer); + + /* always return to max speed here */ + vcpufreq_set_speed(info->cpu, freq); +out: + info->ret = ret; +} + +int vcpufreq_glue_set_freq(unsigned int cpu, unsigned int new_freq, + unsigned int old_freq) +{ + struct vpcufreq_hr_timer_set_freq_info info; + int ret; + + memset(&info, 0, sizeof(info)); + + info.cpu = cpu; + info.new_freq = new_freq; + info.old_freq = old_freq; + info.ret = -EINVAL; + + ret = smp_call_function_single(cpu, hr_timer_glue_set_freq, &info, 1); + if (ret != 0) { + pr_err("#%d: failed to call per CPU glue set freq\n", cpu); + return ret; + } + + if (info.ret != 0) { + pr_err("#%d: failed to set freq\n", cpu); + return info.ret; + } + + return 0; +} + +static void hr_timer_glue_init_cpu(void *info) +{ + struct hrtimer_info __percpu *hti; + struct cpufreq_policy *policy = info; + + BUG_ON(policy == NULL); + + BUG_ON(smp_processor_id() != policy->cpu); + + hti = &per_cpu(hr_timer, policy->cpu); + + hrtimer_init(&hti->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_PINNED); + hti->hrtimer.function = vcpufreq_hrtimer_handler; + + pr_info("#%d: %s\n", policy->cpu, __func__); +} + +int vcpufreq_glue_init(struct cpufreq_policy *policy, int *freq) +{ + struct hrtimer_info __percpu *hti; + int ret = 0; + + BUG_ON(freq == NULL); + + if (*freq == 0) { + *freq = 1000000; /* simulated 1GHz */ + } + + /* initialize per cpu structure */ + hti = &per_cpu(hr_timer, policy->cpu); + memset(hti, 0, sizeof(*hti)); + hti->cpu = policy->cpu; + + ret = smp_call_function_single(policy->cpu, hr_timer_glue_init_cpu, policy, 1); + if (ret != 0) { + pr_err("#%d: failed to call per CPU glue init\n", policy->cpu); + goto error_out; + } + + ret = 0; + +error_out: + return ret; +} + +int vcpufreq_glue_exit(struct cpufreq_policy *policy) +{ + return 0; +} -- 1.7.1

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linaro-dev June 2012