Re: Linux "sleep" command not waking up under high CPU utilization

up...@gmail.com> Sent: Wednesday, April 18, 2018 7:10 AM Subject: Re: Linux "sleep" command not waking up under high CPU utilization Buy a clue? That can be expensive depending upon how many vowels are necessary. :-) Look, the sleep call is awkward to begin with... and that's within

Re: Linux "sleep" command not waking up under high CPU utilization

Ah so it was "Test Plan Charlie"? The "TPC" TLA was once used for "The Phone Company". Was it the 100Hz timer that caused most of the thrashing? -soup On Thu, Apr 19, 2018 at 1:44 PM, James Tison wrote: > And I have an old friend, former IBMer, who remembers Mr. Foxworthy

Re: Linux "sleep" command not waking up under high CPU utilization

And I have an old friend, former IBMer, who remembers Mr. Foxworthy when they worked in the same department at Eastern Airlines. Bonus points? Test Plan Charlie :-) Peace out. Jim Tison z/TPF Specialist Global Technology Services jti...@us.ibm.com IBM Services

Re: Linux "sleep" command not waking up under high CPU utilization

Oh and PBR is a real thing... I lived up in Nederland and Eldora and Jamestown -- no flatlands for me - Boulder was the cosmic center of the universe for awhile (burp) Scott Rohling On Thu, Apr 19, 2018 at 10:20 AM, Scott Rohling wrote: > Don't know - I worked on

Re: Linux "sleep" command not waking up under high CPU utilization

shoot PRB .. peoples republic of boulder On Thu, Apr 19, 2018 at 10:22 AM, Scott Rohling wrote: > Oh and PBR is a real thing... I lived up in Nederland and Eldora and > Jamestown -- no flatlands for me - Boulder was the cosmic center of the > universe for awhile

Re: Linux "sleep" command not waking up under high CPU utilization

Don't know - I worked on RETAIN and then HONE - wrote a thing called REGISTER that did DIRMAINT/RACF admin via panels - then z/VM tools and system support -then started working from home in '96 doing various and sundry things around z/VM and zLinux. I just know the Boulder plant started to feel

Re: Linux "sleep" command not waking up under high CPU utilization

Well, I spent a week at the People's Republic of Boulder to work on the USF Production Staging Environment though I thought the Tampa QA USF lab made more sense as we had DNS service. It seemed to me, however, that Boulder is where IBM manufactures most of their Blue Tape. -soup On Thu, Apr 19,

Re: Linux "sleep" command not waking up under high CPU utilization

390@VM.MARIST.EDU> on behalf of Scott Rohling <scott.rohl...@gmail.com> Sent: Thursday, April 19, 2018 12:34:49 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Linux "sleep" command not waking up under high CPU utilization > > > > > I've also got some Foxworthy-ish routines;

Re: Linux "sleep" command not waking up under high CPU utilization

> > > > > I've also got some Foxworthy-ish routines; When working for IBM in Tampa > I've worked with folks who remembered when Jeff Foxworthy was employed by > IBM. > > > ​I worked for his father, Jim Foxworthy at the Tampa IBM support center (1979-83) ... met Jeff at a wedding when his dad

Re: Linux "sleep" command not waking up under high CPU utilization

The dead giveaway (IMHO): DAVID JONES MANAGING DIRECTOR FOR ZSYSTEMS SERVICES z/VM, Linux, and Cloud All right, so take a bucket of salt as you read the below as it qualifies as a WAG (and not a SWAG). And, yes, my tongue is firmly planted in my cheek as I keyboarded the below. I cope with

Re: Linux "sleep" command not waking up under high CPU utilization

We're just beginning this process, Christian. I'll let the group know what we find out. DJ --- DAVID JONES | MANAGING DIRECTOR FOR ZSYSTEMS SERVICES | z/VM, Linux, and Cloud 703.237.7370 (Office) | 281.578.7544 (CELL) INFORMATION TECHNOLOGY COMPANY [3] On 04.19.2018 8:35 AM, Christian

Re: Linux "sleep" command not waking up under high CPU utilization

On 04/19/2018 04:56 PM, Dave Jones wrote: > Thanks to all who responded to my query. At least we now know why the > problem is occurring, and we will try some internal z/linux tuning. > Anything useful that can be shared with the list?

Re: Linux "sleep" command not waking up under high CPU utilization

Thanks to all who responded to my query. At least we now know why the problem is occurring, and we will try some internal z/linux tuning. DJ --- DAVID JONES | MANAGING DIRECTOR FOR ZSYSTEMS SERVICES | z/VM, Linux, and Cloud 703.237.7370 (Office) | 281.578.7544 (CELL) INFORMATION TECHNOLOGY

Re: Linux "sleep" command not waking up under high CPU utilization

On Wed, 18 Apr 2018, John Campbell wrote: > "This should not happen"... Never confuse theory with practice. The tell-tale give-away is the use of the verb form: should as it indicates the speaker is working from expectation rather than observation -- Russ herrold

Re: Linux "sleep" command not waking up under high CPU utilization

"This should not happen"... Never confuse theory with practice. In Software development, theory and practice appear identical. (BT,DT) In Systems Integration and Application Production Support you quickly learn that theory and practice are seldom within the same galaxy much less the same solar

Re: Linux "sleep" command not waking up under high CPU utilization

> If in a virtualized instance... > https://www.youtube.com/watch?v=__n5Bgxx-68 [4]Very well played, Sir! remarkably funny and one of my favorites, too. DJ [4] --- DAVID JONES | MANAGING DIRECTOR FOR ZSYSTEMS SERVICES | z/VM, Linux, and Cloud 703.237.7370 (Office) | 281.578.7544 (CELL)

Re: Linux "sleep" command not waking up under high CPU utilization

On 04/18/2018 03:36 PM, Dave Jones wrote: > Hello, gang. > > I have a very simple bash script that runs a trivial data collection > task, and then does a Linux "sleep im" to wait a minute before running > the data collection task again. Under very high CPU loads (> 90%) I have > noticed that the

Re: Linux "sleep" command not waking up under high CPU utilization

Buy a clue? That can be expensive depending upon how many vowels are necessary. :-) Look, the sleep call is awkward to begin with... and that's within a C program! (Since perl uses sleep() it can work more-or-less the same way.) A sleep(1) call will vary, for instance. Depending upon the