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[Bug translator/6932] c->busy can be non-atomic.
- From: "mhiramat at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 13 Nov 2008 17:37:26 -0000
- Subject: [Bug translator/6932] c->busy can be non-atomic.
- References: <20081001203800.6932.mhiramat@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From mhiramat at redhat dot com 2008-11-13 17:37 -------
Hmm, however, the oprofile showed this did not so much improve performance on
ia64...
0.7.2 without this change:
---
000000000000cc20 9672 1.0968 stap_780d862f8ed31f54314ad730113ad90d_401.ko
stap_780d862f8ed31f54314ad730113ad90d_401 enter_kprobe_probe
000000000000cc20 589 6.0897
000000000000cc40 48 0.4963
000000000000cc58 36 0.3722
000000000000cc60 4 0.0414
000000000000cc64 38 0.3929
000000000000cc70 272 2.8122
000000000000cc80 176 1.8197
000000000000cc84 217 2.2436
000000000000cc90 39 0.4032
000000000000cc98 47 0.4859
000000000000cca4 40 0.4136
000000000000ccb0 39 0.4032
000000000000ccb8 60 0.6203
000000000000ccc4 35 0.3619
000000000000ccd0 38 0.3929
000000000000d174 7869 81.3586
000000000000d178 49 0.5066
000000000000d180 43 0.4446
000000000000d188 33 0.3412
git-with this change:
---
000000000000ce80 8448 0.9590 stap_9654f52ad4d73402acf5522fa20ffae3_401.ko
stap_9654f52ad4d73402acf5522fa20ffae3_401 enter_kprobe_probe
000000000000ce80 540 6.3920
000000000000cea0 39 0.4616
000000000000ceb8 40 0.4735
000000000000cec4 48 0.5682
000000000000ced0 230 2.7225
000000000000cee0 161 1.9058
000000000000cee4 200 2.3674
000000000000cef0 37 0.4380
000000000000cef8 44 0.5208
000000000000cf04 34 0.4025
000000000000cf10 31 0.3670
000000000000cf18 42 0.4972
000000000000cf24 36 0.4261
000000000000cf30 43 0.5090
000000000000d3d4 6801 80.5043
000000000000d3d8 53 0.6274
000000000000d3e0 33 0.3906
000000000000d3e8 35 0.4143
000000000000db20 1 0.0118
So, this issue is not so important...
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6932
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