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| Who | When | What | Removed | Added |
|---|---|---|---|---|
| Red Hat Bugzilla | 2021-01-07 14:06:35 UTC | Pool ID | sst_platform_tools_rhel_8 | |
| Red Hat One Jira (issues.redhat.com) | 2021-01-07 14:10:05 UTC | Link ID | Red Hat Issue Tracker - Private RHELPLAN-63269 | |
| Florian Weimer | 2021-01-07 14:16:13 UTC | Doc Text | Cause: On x86-64, the glibc implementation of string functions overestimated the amount of last-level cache available to a thread. Consequence: Calling memcpy on large buffers would negatively impact overall cache performance of the system. Fix: The last-level cache size is no longer scaled with the number of potential hardware threads in the system. Result: The string functions bypass caches for large buffers, avoiding undue cache impact on the rest of the system. | |
| Doc Type | If docs needed, set a value | Bug Fix | ||
| Type | --- | Bug | ||
| Florian Weimer | 2021-01-07 15:33:05 UTC | Status | NEW | ASSIGNED |
| Florian Weimer | 2021-01-07 17:03:23 UTC | Status | ASSIGNED | MODIFIED |
| Fixed In Version | glibc-2.28-127.el8_3.2 | |||
| Florian Weimer | 2021-01-07 17:12:44 UTC | Doc Text | Cause: On x86-64, the glibc implementation of string functions overestimated the amount of last-level cache available to a thread. Consequence: Calling memcpy on large buffers would negatively impact overall cache performance of the system. Fix: The last-level cache size is no longer scaled with the number of potential hardware threads in the system. Result: The string functions bypass caches for large buffers, avoiding undue cache impact on the rest of the system. | Cause: On x86-64, the glibc implementation of string functions wrongly estimated the amount of last-level cache available to a thread. Consequence: Calling memcpy on large buffers could negatively impact overall cache performance of the system, or the memcpy call itself could be slow. Fix: The last-level cache size is no longer scaled with the number of reported hardware threads in the system. Result: The string functions bypass caches for large buffers (and only for large buffer), avoiding undue cache impact on the rest of the system. |
| errata-xmlrpc | 2021-01-11 18:19:51 UTC | Status | MODIFIED | ON_QA |
| Florian Weimer | 2021-01-13 12:49:29 UTC | Blocks | 1913656 | |
| CC | yoguma | |||
| Jay Shin | 2021-01-14 01:33:26 UTC | CC | jaeshin | |
| Link ID | Red Hat Knowledge Base (Solution) 5514711 | |||
| Yanhui Ma | 2021-01-14 02:45:55 UTC | CC | yama | |
| Sergey Kolosov | 2021-02-05 19:30:43 UTC | Status | ON_QA | VERIFIED |
| CC | skolosov | |||
| errata-xmlrpc | 2021-02-16 00:06:00 UTC | Status | VERIFIED | RELEASE_PENDING |
| errata-xmlrpc | 2021-02-16 14:36:33 UTC | Status | RELEASE_PENDING | CLOSED |
| Resolution | --- | ERRATA | ||
| Last Closed | 2021-02-16 14:36:33 UTC | |||
| Pavel Najman | 2021-09-17 12:24:26 UTC | Pool ID | sst_platform_tools_rhel_8 | sst_pt_pcp_rhel_8 |
| Pavel Najman | 2021-09-17 12:34:06 UTC | Pool ID | sst_pt_pcp_rhel_8 | sst_pt_gcc_glibc_rhel_8 |
| Mark O'Brien | 2023-07-18 14:30:35 UTC | Pool ID | sst_pt_glibc_rhel_8 | sst_pt_libraries_rhel_8 |
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