Messages in this thread |  | | Date | Tue, 18 Sep 2001 15:51:21 -0400 | From | Arjan van de Ven <> | Subject | Preliminary testing results for 2.4.10-pre11 |
| |
Hi.
In the Red Hat testlab, Bob Matthews has run the stress-test part of our normal "release signoff tests" on 2.4.10pre11 to evaluate the new VM for stability.
So far, tests were done on 2 different machines, both using a kernel compiled with PAE support (HIGHMEM64G).
"Test4" is a 4xPIII machine with 2Gb RAM and 4Gb swap "Test30" is a 2xPIII machine with 1GB RAM and 2Gb swap
Neither of these machines passed the test; 2.4.7-ac3 (as used in Red Hat beta Roswell 2) and 2.4.9-ac kernels do pass these tests.
Test4: Random failures of memtst, apparently due to OOM. Random failure of file system tests, cause unknown.
Test30: Random failures of memtst, TTCP, the file system tests and the floating point tests, all apparently due to OOM. OOM killed test harness, can not continue.
("OOM" is "OOM killing process X" and "VM: killing process X")
Similar behavior has been obseverved with the 2.4.6-ac5 kernel, which at the time turned out to have the bug that the VM subsystem never waited for ANY io to complete, which meant the kernel couldn't satisfy new allocations while there were actually plenty of dirty pages around.
About the test --------------
The test can be downloaded from http://people.redhat.com/bmatthews/cerberus and consists of a superset of the Cerberus testsuite as published by VA Linux, and is used by Red Hat and other distributions to test the stability of kernels for distribution releases.
The tests scale to memory, but make sure that at least 500Mb (for small machines) or 1Gb (for bigger machines) swapspace is "slack" eg, on a 2GB Ram / 4Gb swap machine, no more than 5Gb is used for the workload. The test is by no means a speed-indication, only a stability test.
Greetings, Arjan van de Ven - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |