| 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: <49C38537.4050401@monstr.eu> Date: Fri, 20 Mar 2009 12:59:51 +0100 From: Michal Simek <monstr@...str.eu> To: Thomas Gleixner <tglx@...utronix.de> CC: LKML <linux-kernel@...r.kernel.org>, john.williams@...alogix.com, John Stultz <johnstul@...ibm.com> Subject: Re: [PATCH 08/57] microblaze_v7: Interrupt handling, timer support, selfmod code Thomas Gleixner wrote: > On Fri, 20 Mar 2009, Michal Simek wrote: >>> 2) a clock event device which has CLOCK_EVT_FEAT_PERIODIC flag set. >> You meant ONESHOT feature, right? > > Sure :) > >> # cat /proc/timer_list >> Timer List Version: v0.4 >> HRTIMER_MAX_CLOCK_BASES: 2 >> now at 17205889582 nsecs >> >> cpu: 0 >> clock 0: >> .base: 9027a4d0 >> .index: 0 >> .resolution: 1 nsecs >> .get_time: ktime_get_real >> .offset: 0 nsecs >> active timers: >> clock 1: >> .base: 9027a4fc >> .index: 1 >> .resolution: 1 nsecs >> .get_time: ktime_get >> .offset: 0 nsecs >> active timers: >> #0: per_cpu__tick_cpu_sched, tick_sched_timer, S:01, <800005a6>, swapper/1 >> # expires at 17210000000-17210000000 nsecs [in 4110418 to 4110418 nsecs] >> #1: <9f2d3a48>, hrtimer_wakeup, S:01, <9f2d3a48>, inetd/54 >> # expires at 17430563969-17431563926 nsecs [in 224674387 to 225674344 nsecs] >> #2: <9e127a48>, hrtimer_wakeup, S:01, <9e127a48>, thttpd/50 >> # expires at 129748538823-129848538823 nsecs [in 112542649241 to 112642649241 >> nsecs] >> .expires_next : 17210000000 nsecs >> .hres_active : 1 > > Looks good. Now you can enable CONFIG_NOHZ as well. :) That needs just > the following extras in your idle loop: > > --> tick_nohz_stop_sched_tick(1); > while (!need_resched()) > idle(); > --> tick_nohz_restart_sched_tick(); > Yes, it is already in cpu_idle function. ->arch/microblaze/kernel/process.c file Seems that work too. Look below. I am going to take a look at __do_IRQ issue. Thanks, Michal > Thanks, > > tglx early_printk_console is enabled at 0x84000000 Ramdisk addr 0x90c80040, FDT 0x90780000 Found romfs @ 0x90c80040 (0x001bf000) #### klimit 902f7000 #### Moving 0x001bf000 bytes from 0x90c80040 to 0x902f62ac New klimit: 0x904b6000 Found FDT at 0x90780000 Linux version 2.6.29-rc8-00473-g1219507-dirty (monstr@...str.eu) (gcc version 3.4.1 ( PetaLinux 0.20 Build -rc1 050607 )) #51 Fri Mar 20 12:56:11 CET 2009 setup_cpuinfo: initialising setup_cpuinfo: Using full CPU PVR support setup_memory: Main mem: 0x90000000-0xa0000000, size 0x10000000 setup_memory: kernel addr=0x90000000-0x904b6000 size=0x004b6000 setup_memory: max_mapnr: 0x10000 setup_memory: min_low_pfn: 0x90000 setup_memory: max_low_pfn: 0xa0000 On node 0 totalpages: 65536 free_area_init_node: node 0, pgdat 902852f4, node_mem_map 904b6000 Normal zone: 512 pages used for memmap Normal zone: 0 pages reserved Normal zone: 65024 pages, LIFO batch:15 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 65024 Kernel command line: console=ttyUL0,115200 highres=on xlnx,xps-intc-1.00.a #0 at 0x81800000, num_irq=9, edge=0x100 PID hash table entries: 1024 (order: 10, 4096 bytes) xlnx,xps-timer-1.00.a #0 at 0x83c00000, irq=3 Heartbeat GPIO at 0x81400000 microblaze_timer_set_mode: shutdown microblaze_timer_set_mode: periodic Dentry cache hash table entries: 32768 (order: 5, 131072 bytes) Inode-cache hash table entries: 16384 (order: 4, 65536 bytes) Memory: 254848k/262144k available ODEBUG: selftest passed Calibrating delay loop... 61.44 BogoMIPS (lpj=307200) Mount-cache hash table entries: 512 net_namespace: 544 bytes NET: Registered protocol family 16 bio: create slab <bio-0> at 0 microblaze_timer_set_mode: oneshot Switched to high resolution mode on CPU 0 NET: Registered protocol family 2 IP route cache hash table entries: 2048 (order: 1, 8192 bytes) TCP established hash table entries: 8192 (order: 4, 65536 bytes) TCP bind hash table entries: 8192 (order: 3, 32768 bytes) TCP: Hash tables configured (established 8192 bind 8192) TCP reno registered NET: Registered protocol family 1 msgmni has been set to 498 io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered (default) 84000000.serial: ttyUL0 at MMIO 0x84000003 (irq = 8) is a uartlite console [ttyUL0] enabled brd: module loaded nbd: registered device at major 43 uclinux[mtd]: RAM probe address=0x902f62ac size=0x1bf000 Creating 1 MTD partitions on "RAM": 0x000000000000-0x0000001bf000 : "ROMfs" uclinux[mtd]: set ROMfs to be root filesystem index=0 TCP cubic registered NET: Registered protocol family 17 RPC: Registered udp transport module. RPC: Registered tcp transport module. VFS: Mounted root (romfs filesystem) readonly on device 31:0. Freeing unused kernel memory: 96k freed Mounting proc: Mounting var: Populating /var: Running local start scripts. Mounting /etc/config: Populating /etc/config: flatfsd: Nonexistent or bad flatfs (-48), creating new one... flatfsd: Failed to write flatfs (-48): No such device flatfsd: Created 6 configuration files (310 bytes) Mounting sysfs: Setting hostname: Setting up interface lo: Setting up interface eth0: SIOCSIFADDR: No such device Starting thttpd: uclinux login: root Password: # ls bin dev etc home lib mnt proc sys tmp usr var # uptime 00:00:19 up 0 min, load average: 0.21, 0.04, 0.01 # uptime 00:00:20 up 0 min, load average: 0.19, 0.04, 0.01 # uptime 00:00:21 up 0 min, load average: 0.19, 0.04, 0.01 # gunzip < /proc/config.gz # # Automatically generated make config: don't edit # Linux kernel version: 2.6.29-rc8 # Fri Mar 20 12:52:15 2009 # CONFIG_MICROBLAZE=y # CONFIG_SWAP is not set CONFIG_RWSEM_GENERIC_SPINLOCK=y # CONFIG_ARCH_HAS_ILOG2_U32 is not set # CONFIG_ARCH_HAS_ILOG2_U64 is not set CONFIG_GENERIC_FIND_NEXT_BIT=y CONFIG_GENERIC_HWEIGHT=y CONFIG_GENERIC_HARDIRQS=y CONFIG_GENERIC_IRQ_PROBE=y CONFIG_GENERIC_CALIBRATE_DELAY=y CONFIG_GENERIC_TIME=y # CONFIG_GENERIC_TIME_VSYSCALL is not set CONFIG_GENERIC_CLOCKEVENTS=y # CONFIG_PCI is not set # CONFIG_NO_DMA is not set ... # # Processor type and features # CONFIG_TICK_ONESHOT=y CONFIG_NO_HZ=y CONFIG_HIGH_RES_TIMERS=y CONFIG_GENERIC_CLOCKEVENTS_BUILD=y CONFIG_PREEMPT_NONE=y # CONFIG_PREEMPT_VOLUNTARY is not set # CONFIG_PREEMPT is not set CONFIG_HZ_100=y # CONFIG_HZ_250 is not set # CONFIG_HZ_300 is not set # CONFIG_HZ_1000 is not set CONFIG_HZ=100 CONFIG_SCHED_HRTICK=y -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists