SPECjbb2015
Copyright © 2015-2026 Standard Performance Evaluation Corporation
Amazon EC2 c8a.metal-48xl 470648 SPECjbb2015-Composite max-jOPS
366379 SPECjbb2015-Composite critical-jOPS
Tested by: Infobell IT Solutions Pvt. Ltd. Test Sponsor: Infobell IT Solutions Pvt. Ltd. Test location: Bengaluru,India Test date: May 11, 2026
SPEC license #: 6723 Hardware Availability: Dec-2025 Software Availability: Feb-2026 Publication: Thu Jun 4 13:15:51 EDT 2026
Benchmark Results Summary
 
SPECjbb2015-Composite: Single JVM/Single Host
(# of groups: 4)
Overall Throughput RT curve
Overall Throughput RT curve
Overall SUT (System Under Test) Description
VendorAmazon Web Services (AWS)
Vendor URLhttps://aws.amazon.com/ec2/instance-types/c8a/
System SourceSingle Supplier
System DesignationServer Rack
Total Systems1
All SUT Systems IdenticalYES
Total Nodes1
All Nodes IdenticalYES
Nodes Per System1
Total Chips2
Total Cores192
Total Threads192
Total Memory Amount (GB)384
Total OS Images1
SW EnvironmentNon-virtual
  
SUT Description
Hardware hw_1
NameAmazon EC2 c8a.metal-48xl
VendorAmazon Web Services (AWS)
Vendor URLhttps://aws.amazon.com/ec2/instance-types/c8a/
AvailableDec-2025
Modelc8a.metal-48xl
Form FactorNone
CPU NameAMD EPYC 9R45 96-Core Processor
CPU Characteristics96 core, 2.6 GHz, 384MB L3 Cache (Max frequency 4.5 GHz)
Number of Systems1
Nodes Per System1
Chips Per System2
Cores Per System192
Cores Per Chip96
Threads Per System192
Threads Per Core1
Version1.0
CPU Frequency (MHz)2600
Primary Cache32KB(I) + 48KB(D) per core
Secondary Cache1MB (I+D) per core
Tertiary Cache384MB (I+D) on chip per chip
Other CacheNone
Disk1x 500GB EBS
File Systemext4
Memory Amount (GB)384
# and size of DIMM(s)2 x 192GB
Memory DetailsDDR5 6400 MT/s
# and type of Network Interface Cards (NICs)75 Gbps
Power Supply Quantity and Rating (W)None
Other HardwareNone
Cabinet/Housing/EnclosureNone
Shared DescriptionNone
Shared CommentNone
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
NameNone
VendorNone
Vendor URLNone
VersionNone
AvailableNone
BitnessNone
NotesNone
Operating System os_1
NameUbuntu 24.04.4 LTS
VendorUbuntu
Vendor URLhttps://ubuntu.com/
VersionLinux 6.17.0-1013-aws
AvailableFeb-2026
Bitness64
NotesNone
Java Virtual Machine jvm_1
NameOracle Java SE 25.0.2
VendorOracle
Vendor URLhttp://oracle.com/
VersionJava HotSpot 64-bit Server VM, version 25.0.2
AvailableJan-2026
Bitness64
NotesNone
Other Software other_1
NameNone
VendorNone
Vendor URLNone
VersionNone
AvailableNone
BitnessNone
NotesNone
Topology
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_Composite_1(1)
OS Image Description os_1
Tuning

  • tuned-adm profile throughput-performance
  • ulimit -n 1024000
  • echo 950000 > /proc/sys/kernel/sched_rt_runtime_us
  • echo 250000 > /proc/sys/kernel/sched_base_slice_ns
  • echo NO_WAKEUP_PREEMPTION > /sys/kernel/debug/sched/features
  • echo 200000 > /proc/sys/kernel/sched_migration_cost_ns
  • echo 32 > /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 1 > /proc/sys/kernel/numa_balancing
  • echo always > /sys/kernel/mm/transparent_hugepage/enabled
  • echo always > /sys/kernel/mm/transparent_hugepage/defrag
Notes None
JVM Instance jvm_Composite_1
Parts of Benchmark Composite
JVM Instance Description jvm_1
Command Line

-Xms330g -Xmx330g -Xmn300g -server -XX:+UseParallelGC -XX:+AlwaysPreTouch -XX:+UseLargePages -XX:LargePageSizeInBytes=2m -XX:MaxTenuringThreshold=15 -XX:-UseAdaptiveSizePolicy -XX:ParallelGCThreads=96 -XX:SurvivorRatio=80 -XX:TargetSurvivorRatio=95 -XX:+UseNUMA -XX:+UseTransparentHugePages -XX:InlineSmallCode=11k -XX:TLABAllocationWeight=2 -XX:ThreadStackSize=200 -XX:AutoBoxCacheMax=32 -XX:OnStackReplacePercentage=35
Tuning None
Notes None
max-jOPS and critical-jOPS Details
max-jOPS = jOPS passed before the First Failure
Pass/Fail Pass Pass Pass Fail Fail
jOPS 458882 464765 470648 476531 482414
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 197083 356254 448423 454603 461235 366379
Last Success jOPS/First Failure jOPS for SLA points
  Percentile
  10-th 50-th 90-th 95-th 99-th 100-th
500us 23532 / 29415 - / 5883 - / 5883 - / 5883 - / 5883 - / 5883
1000us 417700 / 423583 23532 / 29415 11766 / 17649 11766 / 17649 5883 / 11766 - / 5883
5000us 470648 / - 464765 / 470648 370635 / 376518 288272 / 211792 147077 / 152961 23532 / 11766
10000us 470648 / - 470648 / - 441232 / 447116 388285 / 394168 200025 / 194142 23532 / 29415
25000us 470648 / - 470648 / - 470648 / - 470648 / 447116 382401 / 335337 94130 / 29415
50000us 470648 / - 470648 / - 470648 / - 470648 / 464765 458882 / 411817 94130 / 29415
75000us 470648 / - 470648 / - 470648 / - 470648 / - 470648 / 411817 94130 / 29415
100000us 470648 / - 470648 / - 470648 / - 470648 / - 470648 / 447116 258856 / 29415
200000us 470648 / - 470648 / - 470648 / - 470648 / - 470648 / 464765 335337 / 317687
500000us 470648 / - 470648 / - 470648 / - 470648 / - 470648 / - 429466 / 411817
1000000us 470648 / - 470648 / - 470648 / - 470648 / - 470648 / - 470648 / 411817
Number of probes
Probes jOPS / Total jOPS
Request Mix Accuracy
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)
Delay between status pings
IR/PR Accuracy
IR/PR Accuracy
Run Properties
This section lists properties only set by user
Property Name Default Controller
specjbb.comm.connect.selector.runner.count 0 12
specjbb.controller.maxir.maxFailedPoints 3 1
specjbb.controller.rtcurve.warmup.step 0.1 0.2
specjbb.customerDriver.threads 64 {probe=90, saturate=140}
specjbb.forkjoin.workers 192 {Tier1=48, Tier2=1, Tier3=14}
specjbb.group.count 1 4
specjbb.heartbeat.period 10000 50000
specjbb.heartbeat.threshold 100000 500000
specjbb.mapreducer.pool.size 192 4
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 588310 IR
High-bound (settled) is 503598 IR
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SPECjbb2015 Version: [SPECjbb2015 1.04, Feb 16, 2024]