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* [Bug time/28071] New: clock_gettime lost vDSO acceleration on older kernels
@ 2021-07-10 14:01 fweimer at redhat dot com
2021-07-10 14:01 ` [Bug time/28071] " fweimer at redhat dot com
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: fweimer at redhat dot com @ 2021-07-10 14:01 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=28071
Bug ID: 28071
Summary: clock_gettime lost vDSO acceleration on older kernels
Product: glibc
Version: 2.34
Status: NEW
Severity: normal
Priority: P2
Component: time
Assignee: unassigned at sourceware dot org
Reporter: fweimer at redhat dot com
Target Milestone: ---
#include <time.h>
#include <stdio.h>
#include <errno.h>
int
main (void)
{
struct timespec ts;
errno = 0;
clock_gettime (CLOCK_MONOTONIC, &ts);
printf ("errno = %m (%d)\n", errno);
errno = 0;
clock_gettime (CLOCK_MONOTONIC, &ts);
printf ("errno = %m (%d)\n", errno);
}
strace shows:
[…]
munmap(0xf7f5b000, 11321) = 0
clock_gettime64(CLOCK_MONOTONIC, 0xffb785dc) = -1 ENOSYS (Function not
implemented)
statx(1, "", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT|AT_EMPTY_PATH,
STATX_BASIC_STATS, {stx_mask=STATX_BASIC_STATS, stx_attributes=0,
stx_mode=S_IFCHR|0620, stx_size=0, ...}) = 0
brk(NULL) = 0x9388000
brk(0x93a9000) = 0x93a9000
brk(0x93aa000) = 0x93aa000
write(1, "errno = Function not implemented"..., 38errno = Function not
implemented (38)
) = 38
clock_gettime64(CLOCK_MONOTONIC, 0xffb785dc) = -1 ENOSYS (Function not
implemented)
write(1, "errno = Function not implemented"..., 38errno = Function not
implemented (38)
) = 38
exit_group(0) = ?
+++ exited with 0 +++
Clobbering
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* [Bug time/28071] clock_gettime lost vDSO acceleration on older kernels
2021-07-10 14:01 [Bug time/28071] New: clock_gettime lost vDSO acceleration on older kernels fweimer at redhat dot com
@ 2021-07-10 14:01 ` fweimer at redhat dot com
2021-07-10 14:03 ` fweimer at redhat dot com
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: fweimer at redhat dot com @ 2021-07-10 14:01 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=28071
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fweimer at redhat dot com
See Also| |https://bugs.openjdk.java.n
| |et/browse/JDK-8270244
--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
Clobbering errno is also undesirable because it exposes application bugs.
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* [Bug time/28071] clock_gettime lost vDSO acceleration on older kernels
2021-07-10 14:01 [Bug time/28071] New: clock_gettime lost vDSO acceleration on older kernels fweimer at redhat dot com
2021-07-10 14:01 ` [Bug time/28071] " fweimer at redhat dot com
@ 2021-07-10 14:03 ` fweimer at redhat dot com
2021-07-10 14:41 ` [Bug time/28071] clock_gettime, gettimeofday, time " fweimer at redhat dot com
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: fweimer at redhat dot com @ 2021-07-10 14:03 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=28071
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |i686-linux-gnu
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* [Bug time/28071] clock_gettime, gettimeofday, time lost vDSO acceleration on older kernels
2021-07-10 14:01 [Bug time/28071] New: clock_gettime lost vDSO acceleration on older kernels fweimer at redhat dot com
2021-07-10 14:01 ` [Bug time/28071] " fweimer at redhat dot com
2021-07-10 14:03 ` fweimer at redhat dot com
@ 2021-07-10 14:41 ` fweimer at redhat dot com
2021-07-10 14:49 ` fweimer at redhat dot com
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: fweimer at redhat dot com @ 2021-07-10 14:41 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=28071
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|clock_gettime lost vDSO |clock_gettime,
|acceleration on older |gettimeofday, time lost
|kernels |vDSO acceleration on older
| |kernels
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* [Bug time/28071] clock_gettime, gettimeofday, time lost vDSO acceleration on older kernels
2021-07-10 14:01 [Bug time/28071] New: clock_gettime lost vDSO acceleration on older kernels fweimer at redhat dot com
` (2 preceding siblings ...)
2021-07-10 14:41 ` [Bug time/28071] clock_gettime, gettimeofday, time " fweimer at redhat dot com
@ 2021-07-10 14:49 ` fweimer at redhat dot com
2021-07-10 14:51 ` fweimer at redhat dot com
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: fweimer at redhat dot com @ 2021-07-10 14:49 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=28071
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at sourceware dot org |fweimer at redhat dot com
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* [Bug time/28071] clock_gettime, gettimeofday, time lost vDSO acceleration on older kernels
2021-07-10 14:01 [Bug time/28071] New: clock_gettime lost vDSO acceleration on older kernels fweimer at redhat dot com
` (3 preceding siblings ...)
2021-07-10 14:49 ` fweimer at redhat dot com
@ 2021-07-10 14:51 ` fweimer at redhat dot com
2021-07-10 17:20 ` fweimer at redhat dot com
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: fweimer at redhat dot com @ 2021-07-10 14:51 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=28071
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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* [Bug time/28071] clock_gettime, gettimeofday, time lost vDSO acceleration on older kernels
2021-07-10 14:01 [Bug time/28071] New: clock_gettime lost vDSO acceleration on older kernels fweimer at redhat dot com
` (4 preceding siblings ...)
2021-07-10 14:51 ` fweimer at redhat dot com
@ 2021-07-10 17:20 ` fweimer at redhat dot com
2021-07-10 17:22 ` fweimer at redhat dot com
2021-07-12 21:13 ` adhemerval.zanella at linaro dot org
7 siblings, 0 replies; 9+ messages in thread
From: fweimer at redhat dot com @ 2021-07-10 17:20 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=28071
--- Comment #2 from Florian Weimer <fweimer at redhat dot com> ---
Patch posted: https://sourceware.org/pipermail/libc-alpha/2021-July/128902.html
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* [Bug time/28071] clock_gettime, gettimeofday, time lost vDSO acceleration on older kernels
2021-07-10 14:01 [Bug time/28071] New: clock_gettime lost vDSO acceleration on older kernels fweimer at redhat dot com
` (5 preceding siblings ...)
2021-07-10 17:20 ` fweimer at redhat dot com
@ 2021-07-10 17:22 ` fweimer at redhat dot com
2021-07-12 21:13 ` adhemerval.zanella at linaro dot org
7 siblings, 0 replies; 9+ messages in thread
From: fweimer at redhat dot com @ 2021-07-10 17:22 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=28071
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://bugzilla.redhat.com
| |/show_bug.cgi?id=1981013
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* [Bug time/28071] clock_gettime, gettimeofday, time lost vDSO acceleration on older kernels
2021-07-10 14:01 [Bug time/28071] New: clock_gettime lost vDSO acceleration on older kernels fweimer at redhat dot com
` (6 preceding siblings ...)
2021-07-10 17:22 ` fweimer at redhat dot com
@ 2021-07-12 21:13 ` adhemerval.zanella at linaro dot org
7 siblings, 0 replies; 9+ messages in thread
From: adhemerval.zanella at linaro dot org @ 2021-07-12 21:13 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=28071
Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Target Milestone|--- |2.34
Resolution|--- |FIXED
CC| |adhemerval.zanella at linaro dot o
| |rg
--- Comment #3 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
Fixed upstream (72e84d1db22203e01a43268de71ea8669eca2863).
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end of thread, other threads:[~2021-07-12 21:13 UTC | newest]
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-- links below jump to the message on this page --
2021-07-10 14:01 [Bug time/28071] New: clock_gettime lost vDSO acceleration on older kernels fweimer at redhat dot com
2021-07-10 14:01 ` [Bug time/28071] " fweimer at redhat dot com
2021-07-10 14:03 ` fweimer at redhat dot com
2021-07-10 14:41 ` [Bug time/28071] clock_gettime, gettimeofday, time " fweimer at redhat dot com
2021-07-10 14:49 ` fweimer at redhat dot com
2021-07-10 14:51 ` fweimer at redhat dot com
2021-07-10 17:20 ` fweimer at redhat dot com
2021-07-10 17:22 ` fweimer at redhat dot com
2021-07-12 21:13 ` adhemerval.zanella at linaro dot org
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