Re: TSC warp, Threads

2021-03-12 Thread Achim Gratz via devel
Hal Murray via devel writes: > Can you say more. Is there any good Intel documentation that says "Xeon v3 > and up"? Not that I know of, although it's surely buried inside some file someplace on ARK. > Or anything that describes which families or chips will/won't do what > I want? The trouble

Re: TSC warp, Threads

2021-03-12 Thread Hal Murray via devel
Thanks. > That's an IvyBridge I think, you will want Haswell or later. > Haswell and later are OK (Xeon v3 and up) AFAIK Can you say more. Is there any good Intel documentation that says "Xeon v3 and up"? Or anything that describes which families or chips will/won't do what I want? My search p

Re: TSC warp, Threads

2021-03-11 Thread ASSI via devel
Hal Murray via devel writes: > Does anybody have access to server class systems? Not with bare metal Linux at the moment… > I'm trying to setup a test environment for the thread work. Dell high end > workstations use Xeon chips. I have a T5610, but it has TSC warp so doesn't > use the TSC for

Re: TSC warp, Threads

2021-03-10 Thread Mike via devel
On 3/10/21 8:25 PM, Hal Murray via devel wrote: Does anybody have access to server class systems? Or know somebody who can run a quick test for me? [    0.00] tsc: Fast TSC calibration using PIT [    0.00] tsc: Detected 2100.063 MHz processor [    0.481983] TSC deadline timer available

Re: TSC warp, Threads

2021-03-10 Thread Gary E. Miller via devel
Yo Hal! On Wed, 10 Mar 2021 17:25:26 -0800 Hal Murray via devel wrote: > Just run "dmesg | grep tsc -i" If you get the 3 lines above, it's warped. None of mine: > You can get the CPU chip from /proc/cpuinfo model name : AMD Ryzen 5 3600 6-Core Processor model name : Intel(R) Core(T

TSC warp, Threads

2021-03-10 Thread Hal Murray via devel
Does anybody have access to server class systems? Or know somebody who can run a quick test for me? Long story. I'm trying to setup a test environment for the thread work. Dell high end workstations use Xeon chips. I have a T5610, but it has TSC warp so doesn't use the TSC for timekeeping