Kaveh R. Ghazi - svn speed traversing slow filesystems (original) (raw)

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• From: "Kaveh R. Ghazi"
• To: dberlin at dberlin dot org
• Cc: gcc at gcc dot gnu dot org
• Date: Sat, 19 Nov 2005 10:14:18 -0500 (EST)
• Subject: svn speed traversing slow filesystems

Hi Dan,

(BTW, sorry for the reposted messages.)

While I was waiting for some svn commands to finish (cleanup, update) on my solaris2.7 box, which has a slow filesystem, I happened to run truss -p out of curiosity to see what was taking so long. Turns out that svn does many file operations on long pathnames. I recall that gnu find and other gnu utilities that do directory traversal got jumbo speedups by changing to the directory and running the file ops on "./filename" without long path prefixes.

Could a future svn version get the same speedup? I'm running: svn, version 1.3.0 (Release Candidate 2)

    Thanks,
    --Kaveh

PS: Are we still at RC2?

PPS: Here's sample output from truss that I'm talking about:

lstat("gcc/testsuite/gcc.dg/vect/vect-63.c", 0xFFBEE900) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/props/vect-46.c.svn-work", 0xFFBEF1F8) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/prop-base/vect-46.c.svn-base", 0xFFBEF1F8) = 0 lstat("gcc/testsuite/gcc.dg/vect/vect-46.c", 0xFFBEE900) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/props/vect-82.c.svn-work", 0xFFBEF1F8) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/prop-base/vect-82.c.svn-base", 0xFFBEF1F8) = 0 lstat("gcc/testsuite/gcc.dg/vect/vect-82.c", 0xFFBEE900) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/props/vect-29.c.svn-work", 0xFFBEF1F8) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/prop-base/vect-29.c.svn-base", 0xFFBEF1F8) = 0 lstat("gcc/testsuite/gcc.dg/vect/vect-29.c", 0xFFBEE900) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/props/vect-65.c.svn-work", 0xFFBEF1F8) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/prop-base/vect-65.c.svn-base", 0xFFBEF1F8) = 0 lstat("gcc/testsuite/gcc.dg/vect/vect-65.c", 0xFFBEE900) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/props/vect-48.c.svn-work", 0xFFBEF1F8) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/prop-base/vect-48.c.svn-base", 0xFFBEF1F8) = 0 lstat("gcc/testsuite/gcc.dg/vect/vect-48.c", 0xFFBEE900) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/props/vect-67.c.svn-work", 0xFFBEF1F8) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/prop-base/vect-67.c.svn-base", 0xFFBEF1F8) = 0 lstat("gcc/testsuite/gcc.dg/vect/vect-67.c", 0xFFBEE900) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/props/vect-86.c.svn-work", 0xFFBEF1F8) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/prop-base/vect-86.c.svn-base", 0xFFBEF1F8) = 0 lstat("gcc/testsuite/gcc.dg/vect/vect-86.c", 0xFFBEE900) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/props/vect-69.c.svn-work", 0xFFBEF1F8) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/prop-base/vect-69.c.svn-base", 0xFFBEF1F8) = 0 lstat("gcc/testsuite/gcc.dg/vect/vect-69.c", 0xFFBEE900) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/props/vect-88.c.svn-work", 0xFFBEF1F8) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/prop-base/vect-88.c.svn-base", 0xFFBEF1F8) = 0 lstat("gcc/testsuite/gcc.dg/vect/vect-88.c", 0xFFBEE900) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/props/vect-83_64.c.svn-work", 0xFFBEF1F8) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/prop-base/vect-83_64.c.svn-base", 0xFFBEF1F8) = 0 lstat("gcc/testsuite/gcc.dg/vect/vect-83_64.c", 0xFFBEE900) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/props/vect-11.c.svn-work", 0xFFBEF1F8) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/prop-base/vect-11.c.svn-base", 0xFFBEF1F8) = 0 lstat("gcc/testsuite/gcc.dg/vect/vect-11.c", 0xFFBEE900) = 0 stat("gcc/testsuite/gcc.dg/vect/.svn/props/vect-30.c.svn-work", 0xFFBEF1F8) = 0

-- Kaveh R. Ghazi ghazi@caip.rutgers.edu

• Follow-Ups:
  • Re: svn speed traversing slow filesystems
    * From: Daniel Berlin