Wyes Karny f5cb28a90c 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>		2023-05-30 12:57:51 +01:00
..
accounting
arch	parisc: Align parisc MADV_XXX constants with all other architectures	2023-01-14 10:16:51 +01:00
bootconfig	bootconfig: Fix testcase to increase max node	2023-04-05 11:23:34 +02:00
bpf	bpftool: Fix bug for long instructions in program CFG dumps	2023-05-17 11:47:50 +02:00
build	tools build: Switch to new openssl API for test-libcrypto	2022-08-25 11:38:01 +02:00
cgroup	tools/cgroup/slabinfo.py: updated to work on current kernel	2021-05-07 11:04:31 +02:00
debugging
edid
firewire
firmware
gpio	tools: gpio: fix -c option of gpio-event-mon	2023-02-01 08:23:26 +01:00
hv	tools: hv: change http to https in hv_kvp_daemon.c	2020-07-06 10:46:23 +00:00
iio	tools/iio/iio_utils:fix memory leak	2023-03-11 16:40:17 +01:00
include	tools headers UAPI: Sync openat2.h with the kernel sources	2023-01-04 11:39:17 +01:00
io_uring	tools/io_uring: fix compile breakage	2020-09-21 07:50:58 -06:00
kvm/kvm_stat	tools/kvm_stat: fix display of error when multiple processes are found	2022-08-11 13:06:45 +02:00
laptop
leds
lib	libbpf: Fix single-line struct definition output in btf_dump	2023-04-20 12:10:26 +02:00
memory-model	tools/memory-model: Expand the cheatsheet.txt notion of relaxed	2020-09-04 11:58:15 -07:00
objtool	objtool: Fix memory leak in create_static_call_sections()	2023-03-11 16:40:08 +01:00
pci
pcmcia
perf	perf symbols: Fix return incorrect build_id size in elf_read_build_id()	2023-05-17 11:48:13 +02:00
power	cpupower: Make TSC read per CPU for Mperf monitor	2023-05-30 12:57:51 +01:00
scripts	tools: Allow proper CC/CXX/... override with LLVM=1 in Makefile.include	2021-07-31 08:16:10 +02:00
spi	spi: tools: Make default_tx/rx and input_tx static	2020-06-11 16:27:24 +01:00
testing	selftests/bpf: Wait for receive in cg_storage_multi test	2023-05-17 11:47:50 +02:00
thermal/tmon	tools/thermal: Fix possible path truncations	2022-08-21 15:16:12 +02:00
time
usb	usb: testusb: Fix for showing the connection speed	2021-10-09 14:40:56 +02:00
virtio	tools/virtio: fix the vringh test for virtio ring changes	2023-02-22 12:55:53 +01:00
vm	tools/vm/slabinfo-gnuplot: use "grep -E" instead of "egrep"	2022-12-08 11:23:57 +01:00
wmi
Makefile	bpf: Compile resolve_btfids tool at kernel compilation start	2020-07-13 10:42:02 -07:00