Messages in this thread | | | Subject | Re: anyone measured context-switch cost on Linux/ia32? | Date | Thu, 20 Jan 2000 18:21:34 -0800 | From | Larry McVoy <> |
| |
: > Has anyone measured the cost (in cycles or time) of the : > context-switch path in Linux/ia32? : : here, on a celeron and a slightly hacked UP kernel, a context switch : (time between one process stops executing, is preempted, and another : starts running) is ~4800 cycles (10.7us) at best. stock kernels are : probably not much different in this area.
lmbench, 2 process no working set case:
500Mhz Celeron, 2.2.14 Mandrake 7.0, 1.8usecs 400Mhz PPC (iMac), 2.2.14 Yellow dog 1.0(?), 1.4usecs 500Mhz Alpha, 2.2.13 Red hat 6.1, 2.3usecs
There's something wrong with either your benchmark or your system. 10usecs is more like Solaris :-)
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |