On Wed, Jan 28, 2015 at 5:36 PM, majun (F) <majun258@xxxxxxxxxx> wrote: > Hi All: > I met a problem while testing the ramdisk peformance using fio. > The platform is arm64 , fio version is 2.1.10. > > The ramdisk is enabled on my platform , so there are dev/ram0 ...to dev/ram15 totall 16 ramdisk devices. > I tried to test these ramdisks performance uisng the script file list as below. > > #!/bin/bash >... > fio --time_based ... --runtime=$runtime ... & > done > sleep $runtime > done >... > But the test result is not ok. > The error log is: >... > Have you tried sleeping for slightly longer then the runtime passed to fio? As a result of implementation details and the simple fact that sleep isn't exact, nor is fio's runtime, a script not allowing a sufficient buffer between backgrounded fio operations but intending to run operations sequentially may step on itself. -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
