Wyes Karny 0d778f0cb1 cpupower: Make TSC read per CPU for Mperf monitor ... [ Upstream commit c2adb1877b76fc81ae041e1db1a6ed2078c6746b ] System-wide TSC read could cause a drift in C0 percentage calculation. Because if first TSC is read and then one by one mperf is read for all cpus, this introduces drift between mperf reading of later CPUs and TSC reading. To lower this drift read TSC per CPU and also just after mperf read. This technique improves C0 percentage calculation in Mperf monitor. Before fix: (System 100% busy) | Mperf || RAPL || Idle_Stats PKG|CORE| CPU| C0 | Cx | Freq || pack | core || POLL | C1 | C2 0| 0| 0| 87.15| 12.85| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 0| 256| 84.62| 15.38| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 1| 1| 87.15| 12.85| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 1| 257| 84.08| 15.92| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 2| 2| 86.61| 13.39| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 2| 258| 83.26| 16.74| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 3| 3| 86.61| 13.39| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 3| 259| 83.60| 16.40| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 4| 4| 86.33| 13.67| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 4| 260| 83.33| 16.67| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 5| 5| 86.06| 13.94| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 5| 261| 83.05| 16.95| 2695||168659003|3970468|| 0.00| 0.00| 0.00 0| 6| 6| 85.51| 14.49| 2695||168659003|3970468|| 0.00| 0.00| 0.00 After fix: (System 100% busy) | Mperf || RAPL || Idle_Stats PKG|CORE| CPU| C0 | Cx | Freq || pack | core || POLL | C1 | C2 0| 0| 0| 98.03| 1.97| 2415||163295480|3811189|| 0.00| 0.00| 0.00 0| 0| 256| 98.50| 1.50| 2394||163295480|3811189|| 0.00| 0.00| 0.00 0| 1| 1| 99.99| 0.01| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 1| 257| 99.99| 0.01| 2375||163295480|3811189|| 0.00| 0.00| 0.00 0| 2| 2| 99.99| 0.01| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 2| 258|100.00| 0.00| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 3| 3|100.00| 0.00| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 3| 259| 99.99| 0.01| 2435||163295480|3811189|| 0.00| 0.00| 0.00 0| 4| 4|100.00| 0.00| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 4| 260|100.00| 0.00| 2435||163295480|3811189|| 0.00| 0.00| 0.00 0| 5| 5| 99.99| 0.01| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 5| 261|100.00| 0.00| 2435||163295480|3811189|| 0.00| 0.00| 0.00 0| 6| 6|100.00| 0.00| 2401||163295480|3811189|| 0.00| 0.00| 0.00 0| 6| 262|100.00| 0.00| 2435||163295480|3811189|| 0.00| 0.00| 0.00 Cc: Thomas Renninger <trenn@suse.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Fixes: 7fe2f6399a ("cpupowerutils - cpufrequtils extended with quite some features") Signed-off-by: Wyes Karny <wyes.karny@amd.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-05-24 17:32:43 +01:00
..
accounting	delayacct: remove some unused variables	2022-06-16 19:58:21 -07:00
arch	tools/x86/kcpuid: Fix avx512bw and avx512lvl fields in Fn00000007	2023-05-11 23:03:07 +09:00
bootconfig	bootconfig: Fix testcase to increase max node	2023-03-30 12:49:07 +02:00
bpf	bpftool: Fix bug for long instructions in program CFG dumps	2023-05-11 23:03:21 +09:00
build	perf bpf: Fix build with libbpf 0.7.0 by checking if bpf_program__set_insns() is available	2022-10-25 17:40:48 -03:00
certs
cgroup	iocost_monitor: reorder BlkgIterator	2022-09-23 16:57:10 -10:00
counter
debugging	tools: Add new "test" taint to kernel-chktaint	2022-09-07 14:51:12 -06:00
edid
firewire
firmware
gpio	tools: gpio: fix -c option of gpio-event-mon	2023-02-01 08:34:49 +01:00
hv	tools: hv: kvp: remove unnecessary (void*) conversions	2022-09-05 16:55:20 +00:00
iio	tools/iio/iio_utils:fix memory leak	2023-03-11 13:55:35 +01:00
include	open: return EINVAL for O_DIRECTORY | O_CREAT	2023-05-24 17:32:34 +01:00
io_uring
kvm/kvm_stat	tools/kvm_stat: update exit reasons for vmx/svm/aarch64/userspace	2022-11-09 12:26:52 -05:00
laptop
leds
lib	libbpf: Fix ld_imm64 copy logic for ksym in light skeleton.	2023-05-11 23:03:18 +09:00
memory-model	tools/memory-model: Clarify LKMM's limitations in litmus-tests.txt	2022-08-31 05:15:31 -07:00
objtool	Revert "objtool: Support addition to set CFA base"	2023-05-11 23:03:32 +09:00
pci
pcmcia
perf	perf stat: Separate bperf from bpf_profiler	2023-05-17 11:53:41 +02:00
power	cpupower: Make TSC read per CPU for Mperf monitor	2023-05-24 17:32:43 +01:00
rcu
scripts
spi	spi: spidev_test: Warn when the mode is not the requested mode	2022-06-13 15:56:03 +01:00
testing	selftests: cgroup: Add 'malloc' failures checks in test_memcontrol	2023-05-24 17:32:33 +01:00
thermal	tools/thermal: Fix possible path truncations	2022-08-03 19:28:46 +02:00
time
tracing	tools/tracing/rtla: osnoise_hist: use total duration for average calculation	2023-03-10 09:33:26 +01:00
usb	tools: usb: testusb: Add super-plus speed reporting	2022-07-08 14:54:49 +02:00
verification	rv/dot2c: Make automaton definition static	2022-10-20 16:02:45 -04:00
virtio	tools/virtio: fix the vringh test for virtio ring changes	2023-02-22 12:59:42 +01:00
vm	tools/mm/page_owner_sort.c: fix TGID output when cull=tg is used	2023-04-26 14:28:39 +02:00
wmi
Makefile	tools/nolibc: make the default target build the headers	2022-06-20 09:43:19 -07:00