SPECjbb2015 Report for jbb2015-20260122-01667 : 255915 max-jOPS ; 198582 critical-jOPS

SUT Description

Hardware hw_1
Name	Amazon EC2 m8g.metal-24xl
Vendor	Amazon Web Services (AWS)
Vendor URL	https://aws.amazon.com/ec2/instance-types/m8g/
Available	Sept-2024
Model	m8g.metal-24xl
Form Factor	None
CPU Name	ARM Neoverse-V2
CPU Characteristics	96 core, 2.8 GHz, 36MB L3 Cache
Number of Systems	1
Nodes Per System	1
Chips Per System	1
Cores Per System	96
Cores Per Chip	96
Threads Per System	96
Threads Per Core	1
Version	None
CPU Frequency (MHz)	2800
Primary Cache	64KB(I) + 64KB(D) per core
Secondary Cache	2MB (I+D) per core
Tertiary Cache	36MB (I+D) on chip per chip
Other Cache	None
Disk	1x 500GB EBS with 40 Gbps network bandwidth
File System	xfs
Memory Amount (GB)	384
# and size of DIMM(s)	12 x 32GB
Memory Details	DDR5 5600 MT/s
# and type of Network Interface Cards (NICs)	40 Gbps
Power Supply Quantity and Rating (W)	None
Other Hardware	None
Cabinet/Housing/Enclosure	None
Shared Description	None
Shared Comment	None
Notes	NA: The test sponsor attests, as of date of publication, that CVE-2017-5754 (Meltdown) is mitigated in the system as tested and documented. Yes: The test sponsor attests, as of date of publication, that CVE-2017-5753 (Spectre variant 1) is mitigated in the system as tested and documented. Yes: The test sponsor attests, as of date of publication, that CVE-2017-5715 (Spectre variant 2) is mitigated in the system as tested and documented.
Other Hardware network_1
Name	None
Vendor	None
Vendor URL	None
Version	None
Available	None
Bitness	None
Notes	None

Operating System os_1
Name	Red Hat Enterprise Linux 9.6 (Plow)
Vendor	RHEL
Vendor URL	https://www.redhat.com/
Version	5.14.0-570.41.1.el9_6.x86_64
Available	Sept-2025
Bitness	64
Notes	None
Java Virtual Machine jvm_1
Name	Oracle Java SE 25.0.1
Vendor	Oracle
Vendor URL	http://oracle.com/
Version	Java HotSpot 64-bit Server VM, version 25.0.1
Available	Oct-2025
Bitness	64
Notes	None
Other Software other_1
Name	None
Vendor	None
Vendor URL	None
Version	None
Available	None
Bitness	None
Notes	None

Topology

SUT
- Hardware config_1
  - OS Image os_Image_1
    - JVM jvm_Ctr_1 : Controller
    - JVM jvm_Backend_1 : Backend
    - JVM jvm_TxInjector_1 : TxInjector

SUT config_1 Configuration

Hardware
OS Images	os_Image_1(1)
Hardware Description	hw_1
Number of Systems	1
SW Environment	non-virtual
Tuning	None
Notes	None

OS Image os_Image_1
JVM Instances	jvm_Ctr_1(1), jvm_Backend_1(2), jvm_TxInjector_1(2)
OS Image Description	os_1
Tuning	tuned-adm profile throughput-performance ulimit -n 1024000 echo 950000 > /proc/sys/kernel/sched_rt_runtime_us echo 400000 > /proc/sys/kernel/sched_latency_ns echo 40000 > /proc/sys/kernel/sched_migration_cost_ns echo 100000000 > /proc/sys/kernel/sched_min_granularity_ns echo 40000 > /proc/sys/kernel/sched_wakeup_granularity_ns echo 128 > /proc/sys/kernel/sched_nr_migrate echo 10000 > /proc/sys/vm/dirty_expire_centisecs echo 1500 > /proc/sys/vm/dirty_writeback_centisecs echo 40 > /proc/sys/vm/dirty_ratio echo 10 > /proc/sys/vm/dirty_background_ratio echo 10 > /proc/sys/vm/swappiness echo 0 > /proc/sys/kernel/numa_balancing echo 0 > /proc/sys/vm/numa_stat echo always > /sys/kernel/mm/transparent_hugepage/enabled echo always > /sys/kernel/mm/transparent_hugepage/defrag
Notes	None
JVM Instance jvm_Ctr_1
Parts of Benchmark	Controller
JVM Instance Description	jvm_1
Command Line	-Xms2g -Xmx2g -Xmn1536m -XX:+UseParallelGC -XX:ParallelGCThreads=2 -XX:CICompilerCount=4
Tuning	Used numactl to interleave memory on all CPUs numactl --interleave=all
Notes	None
JVM Instance jvm_Backend_1
Parts of Benchmark	Backend
JVM Instance Description	jvm_1
Command Line	-Xms170g -Xmx170g -Xmn165g -XX:+UseLargePages -XX:+UseParallelGC -XX:LargePageSizeInBytes=2m -XX:-UseAdaptiveSizePolicy -XX:SurvivorRatio=28 -XX:+UseTransparentHugePages -XX:ParallelGCThreads=48 -XX:TargetSurvivorRatio=95 -XX:MaxTenuringThreshold=1 -XX:+AlwaysPreTouch -XX:InlineSmallCode=13k
Tuning	Used numactl to affinitize each Backend JVM to 48 Core/ 48 Threads Group1: numactl --physcpubind=0-47 --localalloc Group2: numactl --physcpubind=48-95 --localalloc
Notes	None
JVM Instance jvm_TxInjector_1
Parts of Benchmark	TxInjector
JVM Instance Description	jvm_1
Command Line	-Xms2g -Xmx2g -Xmn1536m -XX:+UseParallelGC -XX:ParallelGCThreads=2 -XX:CICompilerCount=4
Tuning	Used numactl to affinitize each Injector JVM to 48 Core/ 48 Threads Group1: numactl --physcpubind=0-47 --localalloc Group2: numactl --physcpubind=48-95 --localalloc
Notes	None

max-jOPS and critical-jOPS Details

max-jOPS = jOPS passed before the First Failure
Pass/Fail	Pass	Pass	Fail	Fail	Fail
jOPS	252973	255915	258856	261798	264739

critical-jOPS = Geomean ( jOPS @ 10000; 25000; 50000; 75000; 100000; SLAs )
Response time percentile is 99-th
SLA (us)	10000	25000	50000	75000	100000	Geomean
jOPS	175022	195211	200760	212184	212184	198582

Last Success jOPS/First Failure jOPS for SLA points

	Percentile
	10-th	50-th	90-th	95-th	99-th	100-th
500us	26474 / 29415	2942 / 5883	- / 2942	- / 2942	- / 2942	- / 2942
1000us	223558 / 226499	29415 / 32357	8825 / 11766	5883 / 8825	5883 / 8825	- / 2942
5000us	244149 / 247090	232382 / 235324	217675 / 220616	194142 / 197084	138253 / 132370	8825 / 11766
10000us	244149 / 247090	235324 / 238266	220616 / 223558	214733 / 211792	173551 / 176493	14708 / 11766
25000us	244149 / 247090	235324 / 238266	223558 / 226499	220616 / 223558	205908 / 176493	55889 / 26474
50000us	247090 / 250032	241207 / 238266	223558 / 226499	223558 / 226499	208850 / 176493	126487 / 111779
75000us	247090 / 250032	241207 / 238266	223558 / 226499	223558 / 226499	217675 / 176493	173551 / 152961
100000us	247090 / 250032	244149 / 247090	229441 / 232382	223558 / 226499	217675 / 176493	188259 / 176493
200000us	247090 / 250032	244149 / 247090	235324 / 238266	229441 / 226499	223558 / 211792	214733 / 176493
500000us	255915 / -	247090 / 250032	241207 / 238266	235324 / 238266	232382 / 235324	220616 / 176493
1000000us	255915 / -	255915 / -	247090 / 250032	247090 / 250032	244149 / 247090	235324 / 238266

Number of probes

Request Mix Accuracy

Note

(Actual % in the Mix - Expected % in the Mix) must be within:

'Main Tx' limit of +/-5.0% for the requests whose expected % in the mix is >= 10.0%

'Minor Tx' limit of +/-1.0% for the requests whose expected % in the mix is < 10.0%

Rate of Non-Critical Failures

There were no non-critical failures in Response Time curve building

Delay between performance status pings during RT Curve (Response-Throughput Curve)

IR/PR Accuracy

Run Properties

This section lists properties only set by user

Property Name	Default	Controller	Group1.Backend.beJVM	Group1.TxInjector.txiJVM1	Group2.Backend.beJVM	Group2.TxInjector.txiJVM1
specjbb.comm.connect.selector.runner.count	0	4	0	0	0	0
specjbb.controller.handshake.period	5000	20000
specjbb.controller.handshake.timeout	600000	900000
specjbb.forkjoin.workers	96	{Tier1=120, Tier2=1, Tier3=20}
specjbb.group.count	1	2
specjbb.heartbeat.period	10000	2000
specjbb.heartbeat.threshold	100000	9000000
specjbb.mapreducer.pool.size	96	4
specjbb.txi.pergroup.count	1	1

View table in csv format

Validation Details

Validation Reports


Level: COMPLIANCE
Check	Agent	Result
Check properties on compliance	All	PASSED


Level: CORRECTNESS
Check	Agent	Result
Compare SM and HQ Inventory	All	PASSED

Other Checks

High-bound (max attempted) is 294155 IR

High-bound (settled) is 278131 IR

http://www.spec.org - info@spec.org

SPECjbb2015 Version: [SPECjbb2015 1.04, Feb 16, 2024]

Amazon EC2 m8g.metal-24xl	255915 SPECjbb2015-MultiJVM max-jOPS 198582 SPECjbb2015-MultiJVM critical-jOPS
Tested by: Infobell IT Solutions Pvt. Ltd.	Test Sponsor: Infobell IT Solutions Pvt. Ltd.	Test location: Bengaluru,India	Test date: November 26, 2025
SPEC license #: 6723	Hardware Availability: Sept-2024	Software Availability: Oct-2025	Publication: Thu Mar 5 13:27:25 EST 2026


SPECjbb2015-MultiJVM: Multiple JVMs/Single Host (# of groups: 2) Overall SUT Description SUT Description max-jOPS and critical-jOPS Details Number of probes Request Mix Accuracy Rate Of Non-Critical Failures Delay between performance status pings IR/PR Accuracy Topology SUT Configuration Properties Validation Details Link to Full Disclosure	Overall Throughput RT curve