View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0017046 | CentOS-8 | kernel | public | 2020-02-13 09:12 | 2020-02-13 09:15 |
| Reporter | wenhuanh | ||||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | new | Resolution | open | ||
| Product Version | |||||
| Target Version | Fixed in Version | ||||
| Summary | 0017046: [CentOS Stream] Kernel update results in -169.6% performance regression with ctx-clock | ||||
| Description | ctx-clock is a simple test program to measure the context switch time in clock cycles. With Kernel 4.18.0-168, ctx-clock performance regress -169% compared with Kernel 4.18.0-151. Kernel 4.18.0-151: Average: 190 clocks RSD: 0.8% Kernel 4.18.0-168: Average: 512 clocks RSD: 1.6% regression: -169% | ||||
| Steps To Reproduce | 1) download ctx_clock-1.zip 2) unzip -o ctx_clock-1.zip 3) cc $CFLAGS ctx_clock.c -o ctx_clock 4) ./ctx_clock The result will be printed on screen. | ||||
| Additional Information | Hardware: Processor 2 x Intel Xeon Platium 8280L @ 2.70 GHZ (56 Cores/112 Threads) Motherboard Intel S2600WF (02.01.0008 BIOS with default settings) Memory 384G DDR4-2933 (12 x 32G) Disk 1600GB INTEL SSDPE2KE016T8 Graphics ASPEED Family Network Intel Connection X722 for 10GBASE-T | ||||
| Tags | No tags attached. | ||||
