Hi All,
I am trying to support Microblaze RT. I had to fix two issues to get it
work. I am running 2.6.31.12 but I think that won't be a problem to port
it to latest version.
1. I am getting overruns on uartlite serial console that's why I think
that there is problem in driver. There is no problem to use uart16650.
2. I see that I have the problem with preemptirqsoff because there is
too big max latency.
Can you give me any hint how to debug it?
My point is to be able to proof that RT works as expected that's why I
would like to run several tests to get any sensible results. I saw
several tests in LTP but they are designed at least for glibc 2.5 which
I don't have (2.3.6).
Is there any git repo with rt patches or just single patch which I use?
The next my question are about low level kernel parts which I think
needs to be fixed. Kernel handles concurrect irqs which could be wrong.
I also added preempt support to entry.S which I need to verify. Is there
any way how to do it? Cyclictest shows any results but I would like to
be sure that they are correct.
Please take a look at logs below.
Thanks,
Michal
find /debugfs/tracing/latency_hist/ -name "CPU0" | xargs head
==> /debugfs/tracing/latency_hist/missed_timer_offsets/CPU0 <==
#Minimum latency: <undef> microseconds
#Average latency: <undef> microseconds
#Maximum latency: <undef> microseconds
#Total samples: 0
#There are 0 samples lower than 0 microseconds.
#There are 0 samples greater or equal than 10240 microseconds.
#usecs samples
0 0
1 0
2 0
==> /debugfs/tracing/latency_hist/wakeup/CPU0 <==
#Minimum latency: 181 microseconds
#Average latency: 292 microseconds
#Maximum latency: 789 microseconds
#Total samples: 2184
#There are 0 samples lower than 0 microseconds.
#There are 0 samples greater or equal than 10240 microseconds.
#usecs samples
0 0
1 0
2 0
==> /debugfs/tracing/latency_hist/wakeup/sharedprio/CPU0 <==
#Minimum latency: 185 microseconds
#Average latency: 714 microseconds
#Maximum latency: 2661 microseconds
#Total samples: 200
#There are 0 samples lower than 0 microseconds.
#There are 0 samples greater or equal than 10240 microseconds.
#usecs samples
0 0
1 0
2 0
==> /debugfs/tracing/latency_hist/preemptirqsoff/CPU0 <==
#Minimum latency: 12 microseconds
#Average latency: 1991 microseconds
#Maximum latency: 4294954 microseconds
#Total samples: 76773
#There are 0 samples lower than 0 microseconds.
#There are 35 samples greater or equal than 10240 microseconds.
#usecs samples
0 0
1 0
2 0
==> /debugfs/tracing/latency_hist/preemptoff/CPU0 <==
#Minimum latency: 15 microseconds
#Average latency: 236 microseconds
#Maximum latency: 8961 microseconds
#Total samples: 62021
#There are 0 samples lower than 0 microseconds.
#There are 0 samples greater or equal than 10240 microseconds.
#usecs samples
0 0
1 0
2 0
==> /debugfs/tracing/latency_hist/irqsoff/CPU0 <==
#Minimum latency: 12 microseconds
#Average latency: 39 microseconds
#Maximum latency: 1005 microseconds
#Total samples: 100881
#There are 0 samples lower than 0 microseconds.
#There are 0 samples greater or equal than 10240 microseconds.
#usecs samples
0 0
1 0
2 0
~ #
Cyclictest tests looks ok.
/rt # ./cyclictest -a -t -n -p99
policy: fifo: loadavg: 0.79 0.37 0.14 1/33 86
T: 0 ( 86) P:99 I:1000 C: 10038 Min: 87 Act: 284 Avg: 418 Max:
1615
Kernel log:
Ramdisk addr 0x00000003, Compiled-in FDT at 0xc0270550
Linux version 2.6.31.12-rt21 (monstr@xxxxxxxxx) (gcc version 4.1.2) #64
PREEMPT RT Wed May 19 14:31:53 CEST 2010
setup_cpuinfo: initialising
setup_cpuinfo: Using full CPU PVR support
ERROR: Microblaze DCACHE WB-different for PVR and DTS
cache: wt_msr_noirq
setup_memory: max_mapnr: 0x8000
setup_memory: min_low_pfn: 0x48000
setup_memory: max_low_pfn: 0x50000
On node 0 totalpages: 32768
free_area_init_node: node 0, pgdat c03360b0, node_mem_map c09df000
Normal zone: 256 pages used for memmap
Normal zone: 0 pages reserved
Normal zone: 32512 pages, LIFO batch:7
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32512
Kernel command line: console=ttyS0,115200
PID hash table entries: 512 (order: 9, 2048 bytes)
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
Memory: 119552k/131072k available
Real-Time Preemption Support (C) 2004-2007 Ingo Molnar
Preemptible RCU implementation.
NR_IRQS:32
xlnx,xps-intc-1.00.a #0 at 0xc8000000, num_irq=7, edge=0x13
xlnx,xps-timer-1.00.a #0 at 0xc8004000, irq=4
microblaze_timer_set_mode: shutdown
microblaze_timer_set_mode: periodic
Calibrating delay loop... 44.44 BogoMIPS (lpj=222208)
Mount-cache hash table entries: 512
NET: Registered protocol family 16
microblaze_timer_set_mode: oneshot
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 4096 (order: 3, 32768 bytes)
TCP bind hash table entries: 4096 (order: 4, 114688 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
TCP reno registered
NET: Registered protocol family 1
JFFS2 version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc.
msgmni has been set to 233
Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
83e00000.serial: ttyS0 at MMIO 0x83e01003 (irq = 6) is a 16550A
console [ttyS0] enabled
Device Tree Probing 'ethernet'
xilinx_lltemac 82a80000.ethernet: MAC address is now 0: a:35: 0:22: 1
xilinx_lltemac 82a80000.ethernet: XLlTemac: using DMA mode.
XLlTemac: Dma base address: phy: 0x84600080, virt: 0xc8060080
XLlTemac: buffer descriptor size: 32768 (0x8000)
XLlTemac: Allocating DMA descriptors with kmalloc
XLlTemac: (buffer_descriptor_init) phy: 0x4ed40000, virt: 0xc6d40000,
size: 0x8000
XTemac: PHY detected at address 7.
eth0: Dropping NETIF_F_SG since no checksum feature.
xilinx_lltemac 82a80000.ethernet: eth0: Xilinx TEMAC at 0x82A80000
mapped to 0xC805C000, irq=5
86000000.flash: Found 1 x16 devices at 0x0 in 16-bit bank
Intel/Sharp Extended Query Table at 0x010A
Intel/Sharp Extended Query Table at 0x010A
Intel/Sharp Extended Query Table at 0x010A
Intel/Sharp Extended Query Table at 0x010A
Intel/Sharp Extended Query Table at 0x010A
Using buffer write method
Using auto-unlock on power-up/resume
cfi_cmdset_0001: Erase suspend on write enabled
erase region 0: offset=0x0,size=0x20000,blocks=255
erase region 1: offset=0x1fe0000,size=0x8000,blocks=4
RedBoot partition parsing not available
Creating 6 MTD partitions on "86000000.flash":
0x000000000000-0x000000100000 : "fpga"
0x000000100000-0x000000140000 : "boot"
0x000000140000-0x000000160000 : "bootenv"
0x000000160000-0x000000180000 : "config"
0x000000180000-0x000000b80000 : "image"
0x000000b80000-0x000002000000 : "spare"
TCP cubic registered
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
*****************************************************************************
* *
* REMINDER, the following debugging options are turned on in your
.config: *
* *
* CONFIG_IRQSOFF_TRACER *
* CONFIG_PREEMPT_TRACER *
* CONFIG_FTRACE *
* CONFIG_INTERRUPT_OFF_HIST *
* CONFIG_PREEMPT_OFF_HIST *
* CONFIG_WAKEUP_LATENCY_HIST *
* CONFIG_MISSED_TIMER_OFFSETS_HIST *
* *
* they may increase runtime overhead and latencies. *
* *
*****************************************************************************
Freeing unused kernel memory: 6570k freed
Mounting proc:
Mounting var:
Populating /var:
Running local start scripts.
Mounting debugfs:
Mounting devpts:
Mounting /etc/config:
Populating /etc/config:
flatfsd: Created 4 configuration files (167 bytes)
Mounting sysfs:
Setting hostname:
Bringing up network interfaces:
eth0: XLlTemac: Options: 0x3fa
eth0: XLlTemac: allocating interrupt 2 for dma mode tx.
eth0: XLlTemac: allocating interrupt 3 for dma mode rx.
eth0: XLlTemac: speed set to 100Mb/s
eth0: XLlTemac: Send Threshold = 24, Receive Threshold = 4
eth0: XLlTemac: Send Wait bound = 254, Receive Wait bound = 254
udhcpc (v1.14.3) started
Sending discover...
Sending select for 192.168.0.105...
Lease of 192.168.0.105 obtained, lease time 86400
adding dns 192.168.0.1
Starting portmap:
Welcome to
_____ _ _ _
| ___ \ | | | | (_)
| |_/ / ___ | |_ __ _ | | _ _ __ _ _ __ __
| __/ / _ \| __| / _` || | | || '_ \ | | | |\ \/ /
| | | __/| |_ | (_| || |____| || | | || |_| | > <
\_| \___| \__| \__,_|\_____/|_||_| |_| \__,_|/_/\_\
on Xilinx-SP605-LTP-basic
Xilinx-SP605-net-csum login: root
Password:
~ #
--
Michal Simek, Ing. (M.Eng)
PetaLogix - Linux Solutions for a Reconfigurable World
w: www.petalogix.com p: +61-7-30090663,+42-0-721842854 f: +61-7-30090663
--
Michal Simek, Ing. (M.Eng)
PetaLogix - Linux Solutions for a Reconfigurable World
w: www.petalogix.com p: +61-7-30090663,+42-0-721842854 f: +61-7-30090663
--
To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
