SPECjbb2015 Report for jbb2015-20260527-01715 : 651743 max-jOPS ; 224400 critical-jOPS

SUT Description

Hardware hw_1
Name	Amazon EC2 m8a.metal-48xl
Vendor	Amazon Web Services (AWS)
Vendor URL	https://aws.amazon.com/ec2/instance-types/m8a/
Available	Oct-2025
Model	m8a.metal-48xl
Form Factor	None
CPU Name	AMD EPYC 9R45 96-Core Processor
CPU Characteristics	96 core, 2.6 GHz, 384MB L3 Cache (Max frequency 4.5 GHz)
Number of Systems	1
Nodes Per System	1
Chips Per System	2
Cores Per System	192
Cores Per Chip	96
Threads Per System	192
Threads Per Core	1
Version	1.0
CPU Frequency (MHz)	2600
Primary Cache	32KB(I) + 48KB(D) per core
Secondary Cache	1MB (I+D) per core
Tertiary Cache	384MB (I+D) on chip per chip
Other Cache	None
Disk	1x 500GB EBS
File System	ext4
Memory Amount (GB)	768
# and size of DIMM(s)	24 x 32GB
Memory Details	DDR5 6400 MT/s
# and type of Network Interface Cards (NICs)	75 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. The submitter confirms that the benchmark configuration and execution comply with the applicable Terms of Service and usage policies of the hardware, software, and service providers on which the system under test was deployed
Other Hardware network_1
Name	None
Vendor	None
Vendor URL	None
Version	None
Available	None
Bitness	None
Notes	None

Operating System os_1
Name	Ubuntu 24.04.4 LTS
Vendor	Ubuntu
Vendor URL	https://ubuntu.com/
Version	6.17.0-1012-aws
Available	Feb-2026
Bitness	64
Notes	None
Java Virtual Machine jvm_1
Name	Oracle Java SE 25.0.2
Vendor	Oracle
Vendor URL	http:http://oracle.com/
Version	Java HotSpot 64-bit Server VM, version 25.0.2
Available	Jan-2026
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(24), jvm_TxInjector_1(24)
OS Image Description	os_1
Tuning	tuned-adm profile throughput-performance ulimit -n 1024000 echo 960000 > /proc/sys/kernel/sched_rt_runtime_us echo 9000000 > /proc/sys/kernel/sched_base_slice_ns echo NO_WAKEUP_PREEMPTION > /sys/kernel/debug/sched/features echo 40000 > /proc/sys/kernel/sched_migration_cost_ns echo 9000 > /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=1 -XX:CICompilerCount=2
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	-Xms26g -Xmx26g -Xmn24g -XX:AllocatePrefetchInstr=2 -XX:+UseParallelGC -XX:ParallelGCThreads=8 -XX:LargePageSizeInBytes=2m -XX:-UseAdaptiveSizePolicy -XX:+AlwaysPreTouch -XX:+UseLargePages -XX:SurvivorRatio=12 -XX:TargetSurvivorRatio=95 -XX:MaxTenuringThreshold=15 -XX:InlineSmallCode=11k -XX:MaxGCPauseMillis=100 -XX:LoopUnrollLimit=200 -XX:+UseTransparentHugePages -XX:TLABAllocationWeight=2 -XX:ThreadStackSize=140 -XX:CompileThresholdScaling=120 -XX:CICompilerCount=4 -XX:AutoBoxCacheMax=32 -XX:OnStackReplacePercentage=100 -XX:TLABSize=1m -XX:MinTLABSize=1m -XX:-ResizeTLAB -XX:TLABWasteTargetPercent=1 -XX:TLABWasteIncrement=1 -XX:YoungPLABSize=1m -XX:OldPLABSize=1m
Tuning	Used numactl to affinitize each Backend JVM to 8 Core/ 8 Threads Group1: numactl --physcpubind=0-7 --localalloc Group2: numactl --physcpubind=8-15 --localalloc Group3: numactl --physcpubind=16-23 --localalloc Group4: numactl --physcpubind=24-31 --localalloc Group5: numactl --physcpubind=32-39 --localalloc Group6: numactl --physcpubind=40-47 --localalloc Group7: numactl --physcpubind=48-55 --localalloc Group8: numactl --physcpubind=56-63 --localalloc Group9: numactl --physcpubind=64-71 --localalloc Group10: numactl --physcpubind=72-79 --localalloc Group11: numactl --physcpubind=80-87 --localalloc Group12: numactl --physcpubind=88-95 --localalloc Group13: numactl --physcpubind=96-103 --localalloc Group14: numactl --physcpubind=104-111 --localalloc Group15: numactl --physcpubind=112-119 --localalloc Group16: numactl --physcpubind=120-127 --localalloc Group17: numactl --physcpubind=128-135 --localalloc Group18: numactl --physcpubind=136-143 --localalloc Group19: numactl --physcpubind=144-151 --localalloc Group20: numactl --physcpubind=152-159 --localalloc Group21: numactl --physcpubind=160-167 --localalloc Group22: numactl --physcpubind=168-175 --localalloc Group23: numactl --physcpubind=176-183 --localalloc Group24: numactl --physcpubind=184-191 --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=1 -XX:CICompilerCount=2
Tuning	Used numactl to affinitize each TxInjector JVM to 8 Core/ 8 Threads Group1: numactl --physcpubind=0-7 --localalloc Group2: numactl --physcpubind=8-15 --localalloc Group3: numactl --physcpubind=16-23 --localalloc Group4: numactl --physcpubind=24-31 --localalloc Group5: numactl --physcpubind=32-39 --localalloc Group6: numactl --physcpubind=40-47 --localalloc Group7: numactl --physcpubind=48-55 --localalloc Group8: numactl --physcpubind=56-63 --localalloc Group9: numactl --physcpubind=64-71 --localalloc Group10: numactl --physcpubind=72-79 --localalloc Group11: numactl --physcpubind=80-87 --localalloc Group12: numactl --physcpubind=88-95 --localalloc Group13: numactl --physcpubind=96-103 --localalloc Group14: numactl --physcpubind=104-111 --localalloc Group15: numactl --physcpubind=112-119 --localalloc Group16: numactl --physcpubind=120-127 --localalloc Group17: numactl --physcpubind=128-135 --localalloc Group18: numactl --physcpubind=136-143 --localalloc Group19: numactl --physcpubind=144-151 --localalloc Group20: numactl --physcpubind=152-159 --localalloc Group21: numactl --physcpubind=160-167 --localalloc Group22: numactl --physcpubind=168-175 --localalloc Group23: numactl --physcpubind=176-183 --localalloc Group24: numactl --physcpubind=184-191 --localalloc
Notes	None

max-jOPS and critical-jOPS Details

max-jOPS = jOPS passed before the First Failure
Pass/Fail	Pass	Pass	Pass	Fail	Fail
jOPS	638022	644882	651743	658603	665464

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	147499	193616	227538	270130	324156	224400

Last Success jOPS/First Failure jOPS for SLA points

	Percentile
	10-th	50-th	90-th	95-th	99-th	100-th
500us	6860 / 13721	- / 6860	- / 6860	- / 6860	- / 6860	- / 6860
1000us	89186 / 96046	27442 / 34302	- / 6860	- / 6860	- / 6860	- / 6860
5000us	370464 / 377325	178372 / 185232	116628 / 123488	109767 / 116628	89186 / 96046	- / 6860
10000us	397906 / 404767	308720 / 315581	219534 / 226395	205813 / 212674	144069 / 150930	- / 6860
25000us	411627 / 418487	391046 / 397906	343022 / 349883	315581 / 308720	205813 / 150930	27442 / 20581
50000us	418487 / 425348	404767 / 411627	377325 / 384185	349883 / 336162	233255 / 198953	27442 / 20581
75000us	425348 / 432208	411627 / 418487	384185 / 391046	370464 / 363604	288139 / 240116	27442 / 20581
100000us	432208 / 439069	418487 / 425348	397906 / 404767	377325 / 384185	329302 / 308720	27442 / 20581
200000us	466511 / 473371	439069 / 445929	418487 / 425348	418487 / 425348	404767 / 363604	185232 / 34302
500000us	651743 / 610580	500813 / 507673	466511 / 473371	459650 / 466511	452790 / 445929	377325 / 150930
1000000us	651743 / -	651743 / -	583138 / 589999	562557 / 569417	528255 / 535115	439069 / 384185

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	Group10.Backend.beJVM	Group10.TxInjector.txiJVM1	Group11.Backend.beJVM	Group11.TxInjector.txiJVM1	Group12.Backend.beJVM	Group12.TxInjector.txiJVM1	Group13.Backend.beJVM	Group13.TxInjector.txiJVM1	Group14.Backend.beJVM	Group14.TxInjector.txiJVM1	Group15.Backend.beJVM	Group15.TxInjector.txiJVM1	Group16.Backend.beJVM	Group16.TxInjector.txiJVM1	Group17.Backend.beJVM	Group17.TxInjector.txiJVM1	Group18.Backend.beJVM	Group18.TxInjector.txiJVM1	Group19.Backend.beJVM	Group19.TxInjector.txiJVM1	Group2.Backend.beJVM	Group2.TxInjector.txiJVM1	Group20.Backend.beJVM	Group20.TxInjector.txiJVM1	Group21.Backend.beJVM	Group21.TxInjector.txiJVM1	Group22.Backend.beJVM	Group22.TxInjector.txiJVM1	Group23.Backend.beJVM	Group23.TxInjector.txiJVM1	Group24.Backend.beJVM	Group24.TxInjector.txiJVM1	Group3.Backend.beJVM	Group3.TxInjector.txiJVM1	Group4.Backend.beJVM	Group4.TxInjector.txiJVM1	Group5.Backend.beJVM	Group5.TxInjector.txiJVM1	Group6.Backend.beJVM	Group6.TxInjector.txiJVM1	Group7.Backend.beJVM	Group7.TxInjector.txiJVM1	Group8.Backend.beJVM	Group8.TxInjector.txiJVM1	Group9.Backend.beJVM	Group9.TxInjector.txiJVM1
specjbb.comm.connect.client.pool.size	256	150	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170	256	170
specjbb.comm.connect.selector.runner.count	0	10	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5	20	5
specjbb.comm.connect.timeouts.connect	60000	900000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000
specjbb.comm.connect.timeouts.read	60000	800000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000
specjbb.comm.connect.timeouts.write	60000	800000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000	60000
specjbb.comm.connect.worker.pool.max	256	150	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200	256	200
specjbb.comm.connect.worker.pool.min	1	16	32		32		32		32		32		32		32		32		32		32		32		32		32		32		32		32		32		32		32		32		32		32		32		32
specjbb.controller.maxir.maxFailedPoints	3	1
specjbb.customerDriver.threads	64	{probe=130, saturate=300, service=160}
specjbb.forkjoin.workers	192	{Tier1=650, Tier2=35, Tier3=120}
specjbb.group.count	1	24
specjbb.mapreducer.pool.size	192	10
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 686045 IR

High-bound (settled) is 681946 IR

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

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

Amazon EC2 m8a.metal-48xl	651743 SPECjbb2015-MultiJVM max-jOPS 224400 SPECjbb2015-MultiJVM critical-jOPS
Tested by: Infobell IT Solutions Pvt. Ltd.	Test Sponsor: Infobell IT Solutions Pvt. Ltd.	Test location: Bengaluru,IND	Test date: May 22, 2026
SPEC license #: 6723	Hardware Availability: Oct-2025	Software Availability: Feb-2026	Publication: Thu Jun 25 13:02:27 EDT 2026


SPECjbb2015-MultiJVM: Multiple JVMs/Single Host (# of groups: 24) 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