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Message #02200
[Bug 1018092] Re: Perf test fails on Pandaboard (3.4 TILT)
I found the magic sauce for getting the PMU event counters working in
recent upstream code. On the 4460 the EMU clock has to be forced on. A
patch for this, and for missing PMU/CTI interrupt mods is being applied
to our 3.4 branch now. With this it will be possible to build a kernel
with hardware event counters enabled and use perf to collect counter
data. Bear in mind there is still nothing we can do to really work
around the problem of occasional lost PMU interrupts, as that is a
hardware issue.
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https://bugs.launchpad.net/bugs/1018092
Title:
Perf test fails on Pandaboard (3.4 TILT)
Status in Linaro Texas Instruments Landing Team:
Won't Fix
Status in Linaro Ubuntu Evaluation Builds:
Confirmed
Status in “linux-ti-omap4” package in Ubuntu:
Confirmed
Bug description:
Test case available at lava-tests, and which can also be used from
https://code.launchpad.net/~linaro-maintainers/lava-test/lava-test-
perf.
./run-perf-test.sh
+ whoami
+ [ root != root ]
+ uname -r
+ cut -f 1 -d-
+ KERNELVER=3.4.0
+ apt-cache search linux-linaro-tools-3.4.0
+ head -1
+ cut -f 1 -d
+ PKGNAME=linux-linaro-tools-3.4.0-1-linaro-llt-origen
+ PERFBIN_PREFIX=/usr/bin/perf_
+ uname -r
+ awk -F - {print $1"-"$2}
+ PERFBIN_VER=3.4.0-1
+ [ ! -e /usr/bin/perf_3.4.0-1 ]
+ echo Performing perf record test...
Performing perf record test...
+ TCID=perf record test
+ perf record -e cycles -o perf-lava-test.data stress -c 4 -t 10
+ tee perf-record.log
stress: info: [5325] dispatching hogs: 4 cpu, 0 io, 0 vm, 0 hdd
stress: info: [5325] successful run completed in 10s
[ perf record: Woken up 3 times to write data ]
[ perf record: Captured and wrote 0.766 MB perf-lava-test.data (~33480 samples) ]
+ grep -ao [0-9]\+[ ]\+samples perf-record.log
+ cut -f 1 -d
+ samples=33480
+ [ 33480 -gt 1 ]
+ echo perf record test : PASS
perf record test : PASS
+ rm perf-record.log
+ echo Performing perf report test...
Performing perf report test...
+ TCID=perf report test
+ perf+ tee perf-report.log
report -i perf-lava-test.data
# ========
# captured on: Tue Jun 26 20:03:22 2012
# hostname : linaro-ubuntu-desktop
# os release : 3.4.0-1-linaro-lt-omap
# perf version : 3.4.0
# arch : armv7l
# nrcpus online : 2
# nrcpus avail : 2
# cpudesc : ARMv7 Processor rev 10 (v7l)
# total memory : 974156 kB
# cmdline : /usr/bin/perf_3.4.0-1 record -e cycles -o perf-lava-test.data stress -c 4 -t 10
# event : name = cycles, type = 1, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 15, 16 }
# HEADER_CPU_TOPOLOGY info available, use -I to display
# ========
#
# Events: 19K cpu-clock
#
# Overhead Command Shared Object Symbol
# ........ ....... ................. ...............................
#
38.10% stress libc-2.15.so [.] random_r
36.33% stress libc-2.15.so [.] random
20.79% stress stress [.] atoll_b
3.69% stress libc-2.15.so [.] rand
0.85% stress stress [.] main
0.16% stress [kernel.kallsyms] [k] _raw_spin_unlock_irqrestore
0.04% stress [kernel.kallsyms] [k] _raw_spin_unlock_irq
0.03% stress [kernel.kallsyms] [k] __do_softirq
0.01% stress [kernel.kallsyms] [k] vfp_support_entry
0.01% stress [kernel.kallsyms] [k] vfp_save_state
0.01% stress [kernel.kallsyms] [k] lock_acquire
0.01% stress [kernel.kallsyms] [k] rcu_process_gp_end.isra.23
0.01% stress [kernel.kallsyms] [k] kfree_skbmem
0.00% stress [kernel.kallsyms] [k] debug_check_no_locks_freed
0.00% stress [kernel.kallsyms] [k] filemap_fault
0.00% stress [kernel.kallsyms] [k] proc_flush_task_mnt
#
# (For a higher level overview, try: perf report --sort comm,dso)
#
+ grep -c -e ^[ ]\+[0-9]\+.[0-9]\+% perf-report.log
+ pcnt_samples=16
+ [ 16 -gt 1 ]
+ echo perf report test : PASS
perf report test : PASS
+ rm perf-report.log perf-lava-test.data
+ echo Performing perf stat test...
Performing perf stat test...
+ TCID=perf stat test
+ perf stat -e cycles stress -c 4 -t 10
+ tee perf-stat.log
Error: open_counter returned with 19 (No such device). /bin/dmesg may provide additional information.
Fatal: Not all events could be opened.
+ grep -o [0-9,]\+[ ]\+cycles perf-stat.log
+ sed s/,//g
+ cut -f 1 -d
+ cycles=
+ [ -gt 1 ]
./run-perf-test.sh: 71: [: -gt: unexpected operator
+ echo perf stat test : FAIL
perf stat test : FAIL
+ rm perf-stat.log
+ echo Performing 'perf test'...
Performing 'perf test'...
+ TCID=perf test
+ perf test
+ sed -e s/FAILED!/FAIL/g -e s/Ok/PASS/g -e s/ [0-9]\+:/perf test -/g -e s/:/ :/g
perf test - vmlinux symtab matches kallsyms : FAIL
perf test - detect open syscall event : FAIL
perf test - detect open syscall event on all cpus : FAIL
perf test - read samples using the mmap interface : FAIL
perf test - parse events tests :invalid or unsupported event : 'syscalls :sys_enter_open'
Run 'perf list' for a list of valid events
FAIL
perf test - Validate PERF_RECORD_* events & perf_sample fields : FAIL
perf test - Test perf pmu format parsing : PASS
Using:
Hwpack: hwpack_linaro-lt-panda-x11-base_20120626-139_armhf_supported.tar.gz
Rootfs: linaro-precise-ubuntu-desktop-20120626-247.tar.gz
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