Distribution of threads among CPUs?
Clash Royale CLAN TAG#URR8PPP
lscpu gives:
Thread(s) per core: 2
Core(s) per socket: 32
When running an intensive 32-threads process, why does htop show almost 100% CPU activity on #1-32, but very little activity on #33-64? Why aren't the process's 32 threads distributed evenly among CPUs #1-64?
linux cpu multithreading htop thread
asked Jan 20 at 4:14
GeremiaGeremia
550717
add a comment |
lscpu gives:
Thread(s) per core: 2
Core(s) per socket: 32
When running an intensive 32-threads process, why does htop show almost 100% CPU activity on #1-32, but very little activity on #33-64? Why aren't the process's 32 threads distributed evenly among CPUs #1-64?
linux cpu multithreading htop thread
asked Jan 20 at 4:14
GeremiaGeremia
550717
what doesdistributed evenlymean? .... what were you expecting to see?
– jsotola
Jan 20 at 4:32
@jsotola Why wasn't there (on average) 100% CPU usage every other CPU? Or why weren't the 32 threads running on CPUs 1-16 and 49-64, or 33-64, or something else?
– Geremia
Jan 20 at 4:40
they are distributed evenly .... 16 even numbered cores and 16 odd numbered cores
– jsotola
Jan 20 at 19:09
add a comment |
lscpu gives:
Thread(s) per core: 2
Core(s) per socket: 32
When running an intensive 32-threads process, why does htop show almost 100% CPU activity on #1-32, but very little activity on #33-64? Why aren't the process's 32 threads distributed evenly among CPUs #1-64?
linux cpu multithreading htop thread
asked Jan 20 at 4:14
GeremiaGeremia
550717
lscpu gives:
Thread(s) per core: 2
Core(s) per socket: 32
When running an intensive 32-threads process, why does htop show almost 100% CPU activity on #1-32, but very little activity on #33-64? Why aren't the process's 32 threads distributed evenly among CPUs #1-64?
linux cpu multithreading htop thread
linux cpu multithreading htop thread
asked Jan 20 at 4:14
GeremiaGeremia
550717
asked Jan 20 at 4:14
GeremiaGeremia
550717
asked Jan 20 at 4:14
GeremiaGeremia
550717
asked Jan 20 at 4:14
GeremiaGeremia
550717
asked Jan 20 at 4:14
GeremiaGeremia
550717
550717
what doesdistributed evenlymean? .... what were you expecting to see?
– jsotola
Jan 20 at 4:32
@jsotola Why wasn't there (on average) 100% CPU usage every other CPU? Or why weren't the 32 threads running on CPUs 1-16 and 49-64, or 33-64, or something else?
– Geremia
Jan 20 at 4:40
they are distributed evenly .... 16 even numbered cores and 16 odd numbered cores
– jsotola
Jan 20 at 19:09
add a comment |
what doesdistributed evenlymean? .... what were you expecting to see?
– jsotola
Jan 20 at 4:32
@jsotola Why wasn't there (on average) 100% CPU usage every other CPU? Or why weren't the 32 threads running on CPUs 1-16 and 49-64, or 33-64, or something else?
– Geremia
Jan 20 at 4:40
they are distributed evenly .... 16 even numbered cores and 16 odd numbered cores
– jsotola
Jan 20 at 19:09
what does
distributed evenly mean? .... what were you expecting to see?– jsotola
Jan 20 at 4:32
what does
distributed evenly mean? .... what were you expecting to see?– jsotola
Jan 20 at 4:32
@jsotola Why wasn't there (on average) 100% CPU usage every other CPU? Or why weren't the 32 threads running on CPUs 1-16 and 49-64, or 33-64, or something else?
– Geremia
Jan 20 at 4:40
@jsotola Why wasn't there (on average) 100% CPU usage every other CPU? Or why weren't the 32 threads running on CPUs 1-16 and 49-64, or 33-64, or something else?
– Geremia
Jan 20 at 4:40
they are distributed evenly .... 16 even numbered cores and 16 odd numbered cores
– jsotola
Jan 20 at 19:09
they are distributed evenly .... 16 even numbered cores and 16 odd numbered cores
– jsotola
Jan 20 at 19:09
add a comment |
1 Answer
1
active
oldest
votes
In Linux there is a scheduler.
Some systems will push work to faster/cooler/more-efficient cores but the default behavior is an ordered stack.
answered Jan 20 at 5:30
user1133275user1133275
3,192723
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
In Linux there is a scheduler.
Some systems will push work to faster/cooler/more-efficient cores but the default behavior is an ordered stack.
answered Jan 20 at 5:30
user1133275user1133275
3,192723
add a comment |
In Linux there is a scheduler.
Some systems will push work to faster/cooler/more-efficient cores but the default behavior is an ordered stack.
answered Jan 20 at 5:30
user1133275user1133275
3,192723
add a comment |
In Linux there is a scheduler.
Some systems will push work to faster/cooler/more-efficient cores but the default behavior is an ordered stack.
answered Jan 20 at 5:30
user1133275user1133275
3,192723
In Linux there is a scheduler.
Some systems will push work to faster/cooler/more-efficient cores but the default behavior is an ordered stack.
answered Jan 20 at 5:30
user1133275user1133275
3,192723
edited Jan 20 at 5:37
answered Jan 20 at 5:30
user1133275user1133275
3,192723
answered Jan 20 at 5:30
user1133275user1133275
3,192723
answered Jan 20 at 5:30
user1133275user1133275
3,192723
3,192723
add a comment |
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what does
distributed evenlymean? .... what were you expecting to see?– jsotola
Jan 20 at 4:32
@jsotola Why wasn't there (on average) 100% CPU usage every other CPU? Or why weren't the 32 threads running on CPUs 1-16 and 49-64, or 33-64, or something else?
– Geremia
Jan 20 at 4:40
they are distributed evenly .... 16 even numbered cores and 16 odd numbered cores
– jsotola
Jan 20 at 19:09