5:18 a.m.
I have an idea which improves balanced profile in tuned.
This is the first time that I submit patch, so please
point out if my procedure is wrong.
---
balanced: used conservative CPU governor
In my testing, balanced profile's efficiency is almost as same(*1) as
powersave profile on my server using Xeon-E5.
I think tuned should make difference between balanced profile and powersave
profile. IOW, balanced profile should show better performance and worse power
consumption than powersave profile.
One of root causes is that detailed settings of P-State and C-State are
almost same between balanced profile and powersave profile.
This patch proposes that making "balanced"'s CPU governer to be
conservative.
This will make difference between balanced and powersave(*2).
[Measurement result]
- Load testing tool
JdbcRunner(Database Model)
- Hardware
12core(Xeon E5-2650L 1.80GHz)/8GB Memory/SSD 100GB/1Gbit Network
(But I limit the number of core to "4" by BIOS because of adjusting
CPU load)
- Software
kernel-3.10.0-123.el7.x86_64, tuned-2.3.0-11.el7.noarch
- Throughput, latency and power consumption
(power consumption is measured by ipmitool sensor)
| Throughput | Latency | Power Consumption
Profile | (tpm) | (msec) | on Server (Watt)
--------------------------------------------------------------
(*1)powersave | 8,495 | 28 | 111.2
--------------------------------------------------------------
(*1)balanced | 8,340 | 29 | 111.6
--------------------------------------------------------------
(*2)This patch | 9,284 | 25 | 118.8
--------------------------------------------------------------
throughput- | 10,464 | 25 | 128.0
performance | | |
--------------------------------------------------------------
latency- | 10,911 | 23 | 133.2
performance | | |
--------------------------------------------------------------
- P-State and C-State(measured by turbostat)
| CPU freq| C-State
Profile | (GHz) | (%C0) | (%C1) | (%C3) | (%C6) | (%C7)
--------------------------------------------------------------
powersave | 1.31 | 59.45 | 28.55 | 1.72 | 0 | 10.25
--------------------------------------------------------------
balanced | 1.38 | 61.63 | 30.02 | 0.77 | 0 | 7.56
--------------------------------------------------------------
This patch | 1.81 | 51.27 | 39.91 | 1.78 | 0 | 7.04
--------------------------------------------------------------
throughput- | 2.25 | 46.14 | 52.44 | 0.43 | 0 | 0.97
performance | | | | | |
--------------------------------------------------------------
latency- | 2.30 | 48.36 | 51.64 | 0 | 0 | 0
performance | | | | | |
--------------------------------------------------------------
- CPU utilization(measured by sar)
Profile | %user | %sys | %iowait | %idle
---------------------------------------------------
powersave | 36.69 | 13.32 | 5.25 | 44.74
---------------------------------------------------
balanced | 38.94 | 13.88 | 4.07 | 43.12
---------------------------------------------------
This patch | 42.78 | 14.53 | 5.97 | 36.72
---------------------------------------------------
throughput- | 33.51 | 12.29 | 7.14 | 47.06
performance | | | |
---------------------------------------------------
latency- | 34.58 | 11.71 | 7.89 | 45.82
performance | | | |
---------------------------------------------------
Signed-off-by: Jin Hase <hase.jin(a)jp.fujitsu.com>
1 file changed, 1 insertion(+), 1 deletion(-)
--- profiles/balanced/tuned.conf.orig
+++ profiles/balanced/tuned.conf
@@ -3,7 +3,7 @@
#
[cpu]
-governor=ondemand
+governor=conservative
energy_perf_bias=normal
[audio]