* [Bug 1895703] Re: performance degradation in tcg since Meson switch
2020-09-15 16:50 [Bug 1895703] [NEW] performance degradation in tcg since Meson switch Philippe Mathieu-Daudé
@ 2020-09-16 11:11 ` Paolo Bonzini
2020-09-17 17:50 ` Ahmed Karaman
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Paolo Bonzini @ 2020-09-16 11:11 UTC (permalink / raw)
To: qemu-devel
Can I get a sample statically linked m68k binary that exhibits this
effect?
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1895703
Title:
performance degradation in tcg since Meson switch
Status in QEMU:
New
Bug description:
The buildsys conversion to Meson (1d806cef0e3..7fd51e68c34)
introduced a degradation in performance in some TCG targets:
--------------------------------------------------------
Test Program: matmult_double
--------------------------------------------------------
Target Instructions Previous Latest
1d806cef 7fd51e68
---------- -------------------- ---------- ----------
alpha 3 233 957 639 ----- +7.472%
m68k 3 919 110 506 ----- +18.433%
--------------------------------------------------------
Original report from Ahmed Karaman with further testing done
by Aleksandar Markovic:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg740279.html
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1895703/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 1895703] Re: performance degradation in tcg since Meson switch
2020-09-15 16:50 [Bug 1895703] [NEW] performance degradation in tcg since Meson switch Philippe Mathieu-Daudé
2020-09-16 11:11 ` [Bug 1895703] " Paolo Bonzini
@ 2020-09-17 17:50 ` Ahmed Karaman
2020-09-18 15:38 ` Paolo Bonzini
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Ahmed Karaman @ 2020-09-17 17:50 UTC (permalink / raw)
To: qemu-devel
** Attachment added: "matmult_double-m68k"
https://bugs.launchpad.net/qemu/+bug/1895703/+attachment/5411765/+files/matmult_double-m68k
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1895703
Title:
performance degradation in tcg since Meson switch
Status in QEMU:
New
Bug description:
The buildsys conversion to Meson (1d806cef0e3..7fd51e68c34)
introduced a degradation in performance in some TCG targets:
--------------------------------------------------------
Test Program: matmult_double
--------------------------------------------------------
Target Instructions Previous Latest
1d806cef 7fd51e68
---------- -------------------- ---------- ----------
alpha 3 233 957 639 ----- +7.472%
m68k 3 919 110 506 ----- +18.433%
--------------------------------------------------------
Original report from Ahmed Karaman with further testing done
by Aleksandar Markovic:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg740279.html
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1895703/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 1895703] Re: performance degradation in tcg since Meson switch
2020-09-15 16:50 [Bug 1895703] [NEW] performance degradation in tcg since Meson switch Philippe Mathieu-Daudé
2020-09-16 11:11 ` [Bug 1895703] " Paolo Bonzini
2020-09-17 17:50 ` Ahmed Karaman
@ 2020-09-18 15:38 ` Paolo Bonzini
2020-09-18 16:02 ` Peter Maydell
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Paolo Bonzini @ 2020-09-18 15:38 UTC (permalink / raw)
To: qemu-devel
I get
$ qemu-m68k ./matmult_double-m68k
Error while loading /home/pbonzini/matmult_double-m68k: Permission denied
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1895703
Title:
performance degradation in tcg since Meson switch
Status in QEMU:
New
Bug description:
The buildsys conversion to Meson (1d806cef0e3..7fd51e68c34)
introduced a degradation in performance in some TCG targets:
--------------------------------------------------------
Test Program: matmult_double
--------------------------------------------------------
Target Instructions Previous Latest
1d806cef 7fd51e68
---------- -------------------- ---------- ----------
alpha 3 233 957 639 ----- +7.472%
m68k 3 919 110 506 ----- +18.433%
--------------------------------------------------------
Original report from Ahmed Karaman with further testing done
by Aleksandar Markovic:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg740279.html
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1895703/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 1895703] Re: performance degradation in tcg since Meson switch
2020-09-15 16:50 [Bug 1895703] [NEW] performance degradation in tcg since Meson switch Philippe Mathieu-Daudé
` (2 preceding siblings ...)
2020-09-18 15:38 ` Paolo Bonzini
@ 2020-09-18 16:02 ` Peter Maydell
2020-09-18 17:07 ` Paolo Bonzini
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Peter Maydell @ 2020-09-18 16:02 UTC (permalink / raw)
To: qemu-devel
Paolo: what are the permissions on matmult_double-m68k on your local fs?
(needs to be readable/executable by you)
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1895703
Title:
performance degradation in tcg since Meson switch
Status in QEMU:
New
Bug description:
The buildsys conversion to Meson (1d806cef0e3..7fd51e68c34)
introduced a degradation in performance in some TCG targets:
--------------------------------------------------------
Test Program: matmult_double
--------------------------------------------------------
Target Instructions Previous Latest
1d806cef 7fd51e68
---------- -------------------- ---------- ----------
alpha 3 233 957 639 ----- +7.472%
m68k 3 919 110 506 ----- +18.433%
--------------------------------------------------------
Original report from Ahmed Karaman with further testing done
by Aleksandar Markovic:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg740279.html
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1895703/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 1895703] Re: performance degradation in tcg since Meson switch
2020-09-15 16:50 [Bug 1895703] [NEW] performance degradation in tcg since Meson switch Philippe Mathieu-Daudé
` (3 preceding siblings ...)
2020-09-18 16:02 ` Peter Maydell
@ 2020-09-18 17:07 ` Paolo Bonzini
2020-09-18 23:16 ` Paolo Bonzini
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Paolo Bonzini @ 2020-09-18 17:07 UTC (permalink / raw)
To: qemu-devel
Uff, of course...
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1895703
Title:
performance degradation in tcg since Meson switch
Status in QEMU:
New
Bug description:
The buildsys conversion to Meson (1d806cef0e3..7fd51e68c34)
introduced a degradation in performance in some TCG targets:
--------------------------------------------------------
Test Program: matmult_double
--------------------------------------------------------
Target Instructions Previous Latest
1d806cef 7fd51e68
---------- -------------------- ---------- ----------
alpha 3 233 957 639 ----- +7.472%
m68k 3 919 110 506 ----- +18.433%
--------------------------------------------------------
Original report from Ahmed Karaman with further testing done
by Aleksandar Markovic:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg740279.html
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1895703/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 1895703] Re: performance degradation in tcg since Meson switch
2020-09-15 16:50 [Bug 1895703] [NEW] performance degradation in tcg since Meson switch Philippe Mathieu-Daudé
` (4 preceding siblings ...)
2020-09-18 17:07 ` Paolo Bonzini
@ 2020-09-18 23:16 ` Paolo Bonzini
2020-11-21 23:44 ` Peter Maydell
2020-12-10 9:16 ` Thomas Huth
7 siblings, 0 replies; 9+ messages in thread
From: Paolo Bonzini @ 2020-09-18 23:16 UTC (permalink / raw)
To: qemu-devel
This patch shold fix the regression:
diff --git a/configure b/configure
index 0004c46525..0786144043 100755
--- a/configure
+++ b/configure
@@ -7414,6 +7414,7 @@ NINJA=${ninja:-$PWD/ninjatool} $meson setup \
-Dwerror=$(if test "$werror" = yes; then echo true; else echo false; fi) \
-Dstrip=$(if test "$strip_opt" = yes; then echo true; else echo false; fi) \
-Db_pie=$(if test "$pie" = yes; then echo true; else echo false; fi) \
+ -Db_staticpic=$(if test "$pie" = yes; then echo true; else echo false; fi) \
-Db_coverage=$(if test "$gcov" = yes; then echo true; else echo false; fi) \
-Dmalloc=$malloc -Dmalloc_trim=$malloc_trim -Dsparse=$sparse \
-Dkvm=$kvm -Dhax=$hax -Dwhpx=$whpx -Dhvf=$hvf \
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1895703
Title:
performance degradation in tcg since Meson switch
Status in QEMU:
New
Bug description:
The buildsys conversion to Meson (1d806cef0e3..7fd51e68c34)
introduced a degradation in performance in some TCG targets:
--------------------------------------------------------
Test Program: matmult_double
--------------------------------------------------------
Target Instructions Previous Latest
1d806cef 7fd51e68
---------- -------------------- ---------- ----------
alpha 3 233 957 639 ----- +7.472%
m68k 3 919 110 506 ----- +18.433%
--------------------------------------------------------
Original report from Ahmed Karaman with further testing done
by Aleksandar Markovic:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg740279.html
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1895703/+subscriptions
^ permalink raw reply related [flat|nested] 9+ messages in thread* [Bug 1895703] Re: performance degradation in tcg since Meson switch
2020-09-15 16:50 [Bug 1895703] [NEW] performance degradation in tcg since Meson switch Philippe Mathieu-Daudé
` (5 preceding siblings ...)
2020-09-18 23:16 ` Paolo Bonzini
@ 2020-11-21 23:44 ` Peter Maydell
2020-12-10 9:16 ` Thomas Huth
7 siblings, 0 replies; 9+ messages in thread
From: Peter Maydell @ 2020-11-21 23:44 UTC (permalink / raw)
To: qemu-devel
This was fixed initially by commit 0c3dd50eaecbfe2, which is the change
suggested in Paolo's comment #6, and then refined by commit
a5cb7c5afe717d4.
** Changed in: qemu
Status: New => Fix Committed
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1895703
Title:
performance degradation in tcg since Meson switch
Status in QEMU:
Fix Committed
Bug description:
The buildsys conversion to Meson (1d806cef0e3..7fd51e68c34)
introduced a degradation in performance in some TCG targets:
--------------------------------------------------------
Test Program: matmult_double
--------------------------------------------------------
Target Instructions Previous Latest
1d806cef 7fd51e68
---------- -------------------- ---------- ----------
alpha 3 233 957 639 ----- +7.472%
m68k 3 919 110 506 ----- +18.433%
--------------------------------------------------------
Original report from Ahmed Karaman with further testing done
by Aleksandar Markovic:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg740279.html
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1895703/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 1895703] Re: performance degradation in tcg since Meson switch
2020-09-15 16:50 [Bug 1895703] [NEW] performance degradation in tcg since Meson switch Philippe Mathieu-Daudé
` (6 preceding siblings ...)
2020-11-21 23:44 ` Peter Maydell
@ 2020-12-10 9:16 ` Thomas Huth
7 siblings, 0 replies; 9+ messages in thread
From: Thomas Huth @ 2020-12-10 9:16 UTC (permalink / raw)
To: qemu-devel
Released with QEMU v5.2.0.
** Changed in: qemu
Status: Fix Committed => Fix Released
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1895703
Title:
performance degradation in tcg since Meson switch
Status in QEMU:
Fix Released
Bug description:
The buildsys conversion to Meson (1d806cef0e3..7fd51e68c34)
introduced a degradation in performance in some TCG targets:
--------------------------------------------------------
Test Program: matmult_double
--------------------------------------------------------
Target Instructions Previous Latest
1d806cef 7fd51e68
---------- -------------------- ---------- ----------
alpha 3 233 957 639 ----- +7.472%
m68k 3 919 110 506 ----- +18.433%
--------------------------------------------------------
Original report from Ahmed Karaman with further testing done
by Aleksandar Markovic:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg740279.html
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1895703/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread