Eli Barzilay venit, vidit, dixit 18.05.2010 04:27:
> On May 17, Michael J Gruber wrote:
>> Eli Barzilay venit, vidit, dixit 17.05.2010 12:58:
>>> Every time I run gitk when I didn't use it for a while, it takes a
>>> long time to start (more than 30 seconds) with no visible cpu load. I
>>> tried to strace it, and the result shows that the time is spent
>>> stat()ing my whole /usr/lib directory:
>>>
>>> ...
>>> stat("/usr/lib/libelf-0.131.so", {st_mode=S_IFREG|0755, st_size=87496, ...}) = 0
>>> stat("/usr/lib/libungif.so.4", {st_mode=S_IFREG|0755, st_size=2444, ...}) = 0
>>> stat("/usr/lib/libtiff.so.3.8.2", {st_mode=S_IFREG|0755, st_size=360268, ...}) = 0
>>> ...
>>>
>>> Is this expected? Anything that can be done to avoid it?
>>
>> I don't expect stat'ing /usr/lib to take 30s. How large is it (file
>> size and count)?
>
> I've done some more counting -- the most number of system calls (as
> tracked by strace) are 2968 reads, 4582 lstats, and 6520 stats. And
> it looks like it's recursively scanning /lib, /usr/lib, and /usr/share
> for all *.tcl files. stracing `wish' shows 11000 l/stats -- so I
> guess that the problem is there and not in gitk. Trying wish on a
> fedora 12 machine, I see only ~350 {,f,l}stat64 calls, and gitk starts
> as fast as I'd expect it to.
>
> Oh well, I was hoping that someone knows some bit that needs flipping
> or updating to get it to work faster -- I guess it's one more reason
> to finally upgrade the F7 machine...
>
I guess that was truly wish-ful thinking :)
[You can try and recompile an F12 wish.srpm on F7, of course.]
Sorry,
Michael
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