Amazon EC2 r8a.metal-24xl 338796 SPECjbb2015-Composite max-jOPS
301652 SPECjbb2015-Composite critical-jOPS
Tested by: Infobell IT Solutions Pvt. Ltd. Test Sponsor: Infobell IT Solutions Pvt. Ltd. Test location: Bengaluru,IND Test date: May 21, 2026
SPEC license #: 6723 Hardware Availability: Nov-2025 Software Availability: Feb-2026 Publication: Thu Jun 25 13:02:27 EDT 2026
Benchmark Results Summary
 
Overall Throughput RT curve
Overall SUT (System Under Test) Description
VendorAmazon Web Services (AWS)
Vendor URLhttps://aws.amazon.com/ec2/instance-types/r8a/
System SourceSingle Supplier
System DesignationServer Rack
Total Systems1
All SUT Systems IdenticalYES
Total Nodes1
All Nodes IdenticalYES
Nodes Per System1
Total Chips1
Total Cores96
Total Threads96
Total Memory Amount (GB)768
Total OS Images1
SW EnvironmentNon-virtual
 
Hardware hw_1
NameAmazon EC2 r8a.metal-24xl
VendorAmazon Web Services (AWS)
Vendor URLhttps://aws.amazon.com/ec2/instance-types/r8a/
AvailableNov-2025
Modelr8a.metal-24xl
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 System1
Cores Per System96
Cores Per Chip96
Threads Per System96
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)768
# and size of DIMM(s)12 x 64GB
Memory DetailsDDR5 6400 MT/s
# and type of Network Interface Cards (NICs)40 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.
  • 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
NameNone
VendorNone
Vendor URLNone
VersionNone
AvailableNone
BitnessNone
NotesNone
Operating System os_1
NameUbuntu 24.04.4 LTS
VendorUbuntu
Vendor URLhttps://ubuntu.com/
VersionLinux 6.17.0-1012-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
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

-Xms720g -Xmx720g -Xmn700g -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 = jOPS passed before the First Failure
Pass/Fail Pass Pass Pass Fail Fail
jOPS 330326 334561 338796 343031 347266
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 239274 307033 319738 323973 328208 301652
  Percentile
  10-th 50-th 90-th 95-th 99-th 100-th
500us 245627 / 25410 4235 / 8470 - / 4235 - / 4235 - / 4235 - / 4235
1000us 296446 / 300681 224452 / 25410 12705 / 16940 12705 / 16940 8470 / 12705 - / 4235
5000us 334561 / 338796 304916 / 309151 254097 / 258332 237157 / 118579 190573 / 105874 38115 / 12705
10000us 338796 / - 326091 / 330326 287977 / 292212 271037 / 275272 237157 / 241392 55054 / 12705
25000us 338796 / - 334561 / 338796 330326 / 334561 321856 / 326091 304916 / 309151 135518 / 12705
50000us 338796 / - 334561 / 338796 330326 / 334561 330326 / 334561 321856 / 317621 169398 / 63524
75000us 338796 / - 334561 / 338796 334561 / 338796 330326 / 334561 321856 / 326091 203278 / 182103
100000us 338796 / - 334561 / 338796 334561 / 338796 334561 / 338796 330326 / 326091 237157 / 207513
200000us 338796 / - 338796 / - 334561 / 338796 334561 / 338796 334561 / 338796 266802 / 245627
500000us 338796 / - 338796 / - 334561 / 338796 334561 / 338796 334561 / 338796 309151 / 313386
1000000us 338796 / - 338796 / - 338796 / - 338796 / - 338796 / - 330326 / 334561
Probes jOPS / Total jOPS
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%
There were no non-critical failures in Response Time curve building
Delay between status pings
IR/PR Accuracy
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 96 {Tier1=48, Tier2=1, Tier3=14}
specjbb.group.count 1 2
specjbb.heartbeat.period 10000 50000
specjbb.heartbeat.threshold 100000 500000
specjbb.mapreducer.pool.size 96 4
View table in csv format
 
Level: COMPLIANCE
Check Agent Result
Check properties on compliance All PASSED
 
Level: CORRECTNESS
Check Agent Result
Compare SM and HQ Inventory All PASSED
High-bound (max attempted) is 423495 IR
High-bound (settled) is 368845 IR