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[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.8-242-g731a535
- From: mark at sourceware dot org
- To: systemtap-cvs at sourceware dot org
- Date: 19 Sep 2012 08:44:46 -0000
- Subject: [SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.8-242-g731a535
- Reply-to: systemtap at sourceware dot org
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- Log -----------------------------------------------------------------
commit 731a5359e2f226a0a7fa253265cf59d06c4356bf
Author: Mark Wielaard <mjw@redhat.com>
Date: Wed Sep 19 10:33:29 2012 +0200
parse.cxx swallow tokens we are definitely not using.
The tokens produced by expect_* () were immediately dropped on the floor
after inspection. And a lot of places in the parser called next () just
to get passed the current token without using it. Those tokens could
immediately be cleaned up saving ~3MB of "lost memory".
valgrind stap -v -k -p4 -e 'probe begin { log("Hello, World!"); exit(); }'
Before:
==12545== definitely lost: 2,470,128 bytes in 51,408 blocks
==12545== indirectly lost: 14,180,805 bytes in 319,624 blocks
After:
==14782== definitely lost: 18,856 bytes in 220 blocks
==14782== indirectly lost: 12,432,436 bytes in 264,176 blocks
-----------------------------------------------------------------------
Summary of changes:
parse.cxx | 229 ++++++++++++++++++++++++++++++++++++-------------------------
1 files changed, 136 insertions(+), 93 deletions(-)
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systemtap: system-wide probe/trace tool