Key Industry Players Converge to Advance CXL, a New High-Speed CPU Interconnect for Breakthrough Data Center Performance

Key High­lights:
• Ali­ba­ba, Cis­co, Dell EMC, Face­book, Goog­le, Hew­lett Packard Enter­pri­se, Hua­wei,
Intel Cor­po­ra­ti­on and Micro­soft team up on the new Com­pu­te Express Link (CXL)
tech­no­lo­gy to acce­le­ra­te rapidly gro­wing data workloads such as Arti­fi­ci­al Intel­li­gence
and Machi­ne Lear­ning, rich media ser­vices, High-Per­for­mance Com­pu­ting and Cloud
CXL Spe­ci­fi­ca­ti­on 1.0 rati­fied to address gro­wing high-per­for­mance CPU-to-Device,
inter­con­nect needs and pro­vi­de impro­ved memo­ry cohe­ren­cy for hig­her per­for­mance
of data-inten­si­ve app­li­ca­ti­ons.
• The new open stan­dard will help fos­ter an open acce­le­ra­tor eco­sys­tem for high
per­for­mance, hete­ro­ge­ne­ous com­pu­ting. Inte­rested mem­ber com­pa­nies and
insti­tu­ti­ons are encou­ra­ged to join.

Bea­ver­ton, OR, USA – March 11, 2019 – Ali­ba­ba, Cis­co, Dell EMC, Face­book, Goog­le,
Hew­lett Packard Enter­pri­se, Hua­wei, Intel Cor­po­ra­ti­on and Micro­soft today announ­ced the
for­ma­ti­on of a new indus­try stan­dard group dedi­ca­ted to advan­cing Com­pu­te Express Link
(CXL), a new high-speed CPU-to-Device and CPU-to-Memo­ry inter­con­nect desi­gned to
acce­le­ra­te next-genera­ti­on data cen­ter per­for­mance. The group of com­pa­nies also rati­fied
the CXL Spe­ci­fi­ca­ti­on 1.0, an open indus­try stan­dard that deli­vers bre­akth­rough
per­for­mance for emer­ging usa­ge models while sup­por­ting an open eco­sys­tem for data
cen­ter acce­le­ra­tors and other high-speed enhan­ce­ments.

CXL Spe­ci­fi­ca­ti­on 1.0 Avail­ab­le Now

The CXL Spe­ci­fi­ca­ti­on 1.0 enab­les a high-speed, effi­ci­ent inter­con­nect bet­ween the CPU and
plat­form enhan­ce­ments and workload acce­le­ra­tors, such as GPUs, FPGAs and other
pur­po­se-built acce­le­ra­tor solu­ti­ons. The tech­no­lo­gy is built upon the well-estab­lished PCI
Express® (PCIe®) infra­st­ruc­tu­re, lever­aging the PCIe 5.0 phy­si­cal and elec­tri­cal inter­face to
pro­vi­de advan­ced pro­to­col in three key are­as:
1. I/O Pro­to­col
2. Memo­ry Pro­to­col, initi­al­ly allo­wing a host to sha­re memo­ry with an acce­le­ra­tor
3. Cohe­ren­cy Inter­face

CXL tech­no­lo­gy main­tains memo­ry cohe­ren­cy bet­ween the CPU memo­ry space and memo­ry
on atta­ched devices, which allows resour­ce sharing for hig­her per­for­mance, redu­ced
soft­ware stack com­ple­xi­ty, and lower over­all sys­tem cost. This per­mits users to sim­ply focus
on tar­get workloads as oppo­sed to the red­un­dant memo­ry manage­ment hard­ware in their
acce­le­ra­tors. CXL was desi­gned to be an indus­try open stan­dard inter­face for high-speed
com­mu­ni­ca­ti­ons, as acce­le­ra­tors are increa­singly used to com­ple­ment CPUs in sup­port of
emer­ging app­li­ca­ti­ons such as Arti­fi­ci­al Intel­li­gence and Machi­ne Lear­ning. The spe­ci­fi­ca­ti­on
is avail­ab­le to com­pa­nies that join the CXL Con­sor­ti­um.

Join CXL Indus­try Lea­ders

The foun­ding pro­mo­ter com­pa­nies rep­re­sent a wide-ran­ge of indus­try exper­ti­se and inclu­de
lea­ding Cloud Ser­vice Pro­vi­ders, Com­mu­ni­ca­ti­ons OEMs and Sys­tem OEMs. The group is in
the pro­cess of incor­po­ra­ti­on as an open stan­dard body. Fur­ther­mo­re, efforts are now
under­way to crea­te inno­va­ti­ve usa­ges that leverage CXL tech­no­lo­gy as well as deve­lop CXL
Spe­ci­fi­ca­ti­on 2.0 to fur­ther the standard’s tech­ni­cal fea­tures and capa­bi­li­ties. For
infor­ma­ti­on on how to get invol­ved, con­tact

About Com­pu­te Express Link

Com­pu­te Express Link (CXL) is a high-speed CPU inter­con­nect tech­no­lo­gy that acce­le­ra­tes
next genera­ti­on data cen­ter per­for­mance. Ali­ba­ba, Cis­co, Dell EMC, Face­book, Goog­le,
Hew­lett Packard Enter­pri­se, Hua­wei, Intel Cor­po­ra­ti­on and Micro­soft are forming an open
indus­try stan­dard group to deve­lop tech­ni­cal spe­ci­fi­ca­ti­ons that faci­li­ta­te bre­akth­rough
per­for­mance for emer­ging usa­ge models while sup­por­ting an open eco­sys­tem for data
cen­ter acce­le­ra­tors and other high-speed enhan­ce­ments. For more infor­ma­ti­on on the CXL
Con­sor­ti­um, plea­se visit
# # #

PCI-SIG, PCI Express, and PCIe are regis­te­red trade­marks of PCI-SIG. All other trade­marks
are the pro­per­ty of their respec­tive owners.
CXL Pro­mo­ter State­ments of Sup­port


Ali­ba­ba is glad to sup­port the glo­bal deve­lop­ment and col­la­bo­ra­ti­on of the CXL eco­sys­tem.
As a tech­no­lo­gy inno­va­tor on cloud infra­st­ruc­tu­re and com­pu­ting, we hope to dri­ve the
deve­lop­ment of CXL tog­e­ther with other indus­try lea­ding play­ers, deli­vering more tan­gi­ble
bene­fits to our custo­mers and the com­mu­ni­ty at lar­ge.”
Qiang Liu, Seni­or Direc­tor, Ali­ba­ba Infra­st­ruc­tu­re Ser­vice, Ali­ba­ba Group

Dell EMC

Dell EMC is delight­ed to be part of the CXL Con­sor­ti­um and its all-star cast of pro­mo­ter
com­pa­nies. We are encou­ra­ged to see the true open­ness of CXL, and look for­ward to more
indus­try play­ers joi­ning this effort. The syn­er­gy bet­ween CXL and Gen-Z is clear, and both
will be important com­pon­ents in sup­por­ting Dell EMC’s kine­tic infra­st­ruc­tu­re and this data
Robert Hor­muth, Vice Pre­si­dent & Fel­low, Chief Tech­no­lo­gy Offi­cer, Ser­ver & Infra­st­ruc­tu­re
Sys­tems, Dell EMC


Face­book is exci­ted to join CXL as a foun­ding mem­ber to enab­le and fos­ter a stan­dards­ba­sed open acce­le­ra­tor eco­sys­tem for effi­ci­ent and advan­ced next genera­ti­on sys­tems.”
Vijay Rao, Direc­tor of Tech­no­lo­gy and Stra­te­gy, Face­book


Goog­le sup­ports the open Com­pu­te Express Link col­la­bo­ra­ti­on. Our custo­mers will bene­fit
from the rich eco­sys­tem that CXL will enab­le for acce­le­ra­tors, memo­ry, and sto­rage
Rob Sprink­le, Tech­ni­cal Lead, Plat­forms Infra­st­ruc­tu­re, Goog­le LLC


At HPE we belie­ve that being able to com­po­se com­pu­te resour­ces over open inter­faces is
cri­ti­cal if our indus­try is to keep pace with the demands of a data and AI-dri­ven future. We
applaud Intel for ope­ning up the inter­face to the pro­ces­sor. CXL will help custo­mers uti­li­ze
acce­le­ra­tors more effi­ci­ent­ly and dove­tails well with the open Gen-Z memo­ry-seman­tic
inter­con­nect stan­dard to aid in buil­ding ful­ly-com­po­sable, workload-opti­mi­zed sys­tems.”
Mark Pot­ter, HPE CTO and Direc­tor of Hew­lett Packard Labs


Being a lea­ding pro­vi­der in the indus­try, Hua­wei will play an important role in the
con­tri­bu­ti­on of tech­no­lo­gy spe­ci­fi­ca­ti­on. Huawei’s intel­li­gent com­pu­ting pro­duc­ts which
incor­po­ra­tes Huawei’s chip, acce­le­ra­ti­on com­pon­ents and intel­li­gent manage­ment tog­e­ther
with inno­va­ti­ve opti­mi­zed sys­tem design, can deli­ver end-to-end solu­ti­ons which
signi­fi­cant­ly impro­ves the roll­out and sys­tem effi­ci­en­cy of data cen­ters.”
Zhang Xia­o­hua, GM of Huawei’s Intel­li­gent Com­pu­ting BU


CXL is an important mile­stone for data-centric com­pu­ting, and will be a foun­da­tio­nal
stan­dard for an open, dyna­mic acce­le­ra­tor eco­sys­tem. Like USB and PCI Express, which
Intel also co-foun­ded, we can look for­ward to a new wave of indus­try inno­va­ti­on and
custo­mer value deli­ve­r­ed through the CXL stan­dard.”
Jim Pap­pas, Direc­tor of Tech­no­lo­gy Initia­ti­ves, Intel Cor­po­ra­ti­on


Micro­soft is joi­ning the CXL con­sor­ti­um to dri­ve the deve­lop­ment of new indus­try bus
stan­dards to enab­le future genera­ti­ons of cloud ser­vers. Micro­soft stron­gly belie­ves in
indus­try col­la­bo­ra­ti­on to dri­ve bre­akth­rough inno­va­ti­on. We look for­ward to com­bi­ning
efforts of the con­sor­ti­um with our own acce­le­ra­ted hard­ware achie­ve­ments to advan­ce
emer­ging workloads from deep lear­ning to high per­for­mance com­pu­ting for the bene­fit of
our custo­mers.”
Dr. Leen­dert van Doorn, Dis­tin­guis­hed Engi­neer, Azu­re, Micro­soft
Indus­try State­ment of Sup­port

Gen-Z Con­sor­ti­um

As a Con­sor­ti­um foun­ded to encou­ra­ge an open eco­sys­tem for the next-genera­ti­on memo­ry
and com­pu­te archi­tec­tures, Gen-Z wel­co­mes Com­pu­te Express Link (CXL) to the indus­try
and we look for­ward to oppor­tu­nities for future col­la­bo­ra­ti­on bet­ween our orga­ni­za­ti­ons.”
Kur­tis Bow­man, Pre­si­dent, Gen-Z Con­sor­ti­um