Clocksource "tsc" not available on virtual environment

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Environment

SUSE Linux Enterprise Server 12 (Service Pack 3)

SUSE Linux Enterprise Server for SAP Applications 12 (Service Pack 3)

Situation

As per SAP Note 2753418, SAP HANA 2 SPS04 looks for the clocksource timer "tsc" in:

/sys/devices/system/clocksource/clocksource0/available_clocksource

and

/sys/devices/system/clocksource/clocksource0/current_clocksource.

However on some virtualization and/or cloud solutions with kernel version 4.4.178-94.91 or lower, the "tsc" is not available at the aforementioned locations.

As a result, SAP HANA makes an entry in the SAP HANA Alert log, which in turn may concern customers.

Resolution

Upgrade the SLES12 SP3 OS kernel to at least:

kernel-default-4.4.180-94.103.1

or later.

Cause

Additional Information

Please note that the kernel version 4.4.180-94.103.1 is only available for SLES for SAP Applications or SUSE LTSS (Long Term Service Pack Support)

The related SAP Note is:

2859234 - SAP HANA Timer Fallback alert on SLES 12 SP3

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

Document ID:7024254
Creation Date: 12-Nov-2019
Modified Date:03-Mar-2020
- SUSE Linux Enterprise Server
- SUSE Linux Enterprise Server for SAP Applications

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