Tommi Rantala c61868ef27 perf bench futex-wake: Restore thread count default to online CPU count ... commit f649bd9dd5 upstream. Since commit 3b2323c2c1 ("perf bench futex: Use cpumaps") the default number of threads the benchmark uses got changed from number of online CPUs to zero: $ perf bench futex wake # Running 'futex/wake' benchmark: Run summary [PID 15930]: blocking on 0 threads (at [private] futex 0x558b8ee4bfac), waking up 1 at a time. [Run 1]: Wokeup 0 of 0 threads in 0.0000 ms [...] [Run 10]: Wokeup 0 of 0 threads in 0.0000 ms Wokeup 0 of 0 threads in 0.0004 ms (+-40.82%) Restore the old behavior by grabbing the number of online CPUs via cpu->nr: $ perf bench futex wake # Running 'futex/wake' benchmark: Run summary [PID 18356]: blocking on 8 threads (at [private] futex 0xb3e62c), waking up 1 at a time. [Run 1]: Wokeup 8 of 8 threads in 0.0260 ms [...] [Run 10]: Wokeup 8 of 8 threads in 0.0270 ms Wokeup 8 of 8 threads in 0.0419 ms (+-24.35%) Fixes: 3b2323c2c1 ("perf bench futex: Use cpumaps") Signed-off-by: Tommi Rantala <tommi.t.rantala@nokia.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Darren Hart <dvhart@infradead.org> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lore.kernel.org/lkml/20200305083714.9381-3-tommi.t.rantala@nokia.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-03-18 07:17:57 +01:00
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accounting
arch	x86/decoder: Add TEST opcode to Group3-2	2020-02-24 08:36:55 +01:00
bpf	bpf: Print error message for bpftool cgroup show	2020-02-24 08:36:40 +01:00
build
cgroup
debugging
firewire
firmware
gpio
hv
iio
include	tools lib: Fix builds when glibc contains strlcpy()	2020-02-05 21:22:40 +00:00
io_uring
kvm/kvm_stat	tools/kvm_stat: Fix kvm_exit filter name	2020-02-11 04:35:36 -08:00
laptop
leds
lib	tools lib api fs: Fix gcc9 stringop-truncation compilation error	2020-02-24 08:36:43 +01:00
memory-model	tools/memory-model: Fix data race detection for unordered store and load	2019-12-31 16:43:40 +01:00
nfsd
objtool	objtool: Fix ARCH=x86_64 build error	2020-02-24 08:36:55 +01:00
pci	tools: PCI: Fix fd leakage	2020-01-17 19:48:54 +01:00
pcmcia
perf	perf bench futex-wake: Restore thread count default to online CPU count	2020-03-18 07:17:57 +01:00
power	tools/power/acpi: fix compilation error	2020-02-14 16:34:15 -05:00
scripts
spi
testing	ktest: Add timeout for ssh sync testing	2020-03-18 07:17:51 +01:00
thermal/tmon
time
usb	usbip: Fix unsafe unaligned pointer usage	2020-02-24 08:36:44 +01:00
virtio
vm
wmi
Makefile