Date: Thu, 31 Jan 2008 01:24:28 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Dieter" <freebsd@sopwith.solgatos.com> Cc: freebsd-performance@freebsd.org, freebsd-stable@freebsd.org Subject: Re: newfs + gstat locks entire machine for 20seconds Message-ID: <015901c863a8$064a5750$b6db87d4@multiplay.co.uk> References: <200801302307.XAA22476@sopwith.solgatos.com>
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The plot thickens.... This stall is not just related to newfs you have to
have gstat running as well. If I do the newfs without gstat running then
no stall occurs. As soon as Im running gstat while doing the newfs then
everything locks as described.
Running truss on gstat shows the issue / cause I believe but I dont
know what it means:-
[truss -o t.txt -p 61629 -d]
9.008933817 nanosleep({1.000000000}) = 0 (0x0)
9.008969017 gettimeofday({1201742426.147393},0x0) = 0 (0x0)
9.009009804 poll({0/POLLIN},1,0) = 0 (0x0)
9.009040534 gettimeofday({1201742426.147465},0x0) = 0 (0x0)
9.009076852 clock_gettime(0,{1201742426.147501706}) = 0 (0x0)
9.009294477 sigaction(SIGTSTP,{ SIG_IGN SA_RESTART ss_t },{ 0x800cb2470 SA_RESTART ss_t }) = 0 (0x0)
9.009335823 poll({0/POLLIN},1,0) = 0 (0x0)
9.009387785 poll({0/POLLIN},1,0) = 0 (0x0)
9.009457626 write(1,"\^[[4;11H 5\^[[6C2 32 467.8"...,213) = 213 (0xd5)
9.009488636 sigaction(SIGTSTP,{ 0x800cb2470 SA_RESTART ss_t },0x0) = 0 (0x0)
10.009930312 nanosleep({1.000000000}) = 0 (0x0)
10.009963836 gettimeofday({1201742427.148388},0x0) = 0 (0x0)
10.010005182 poll({0/POLLIN},1,0) = 0 (0x0)
10.010036192 gettimeofday({1201742427.148461},0x0) = 0 (0x0)
10.010073068 clock_gettime(0,{1201742427.148497922}) = 0 (0x0)
10.010292369 mmap(0x801000000,1048576,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON,-1,0x0) = 34376515584 (0x801000000)
10.010327569 __sysctl(0x7fffffffe6c0,0x2,0x7fffffffe650,0x7fffffffe6b8,0x800844970,0x11) = 0 (0x0)
25.052947791 __sysctl(0x7fffffffe650,0x3,0x801000000,0x7fffffffe720,0x0,0x0) = 0 (0x0)
25.054030610 munmap(0x801000000,1048576) = 0 (0x0)
25.055022356 sigaction(SIGTSTP,{ SIG_IGN SA_RESTART ss_t },{ 0x800cb2470 SA_RESTART ss_t }) = 0 (0x0)
25.055067892 poll({0/POLLIN},1,0) = 0 (0x0)
25.055130470 poll({0/POLLIN},1,0) = 0 (0x0)
25.055230203 write(1,"\^[[4;11H1\^[[7C4 64 203.4"...,203) = 203 (0xcb)
25.055263448 sigaction(SIGTSTP,{ 0x800cb2470 SA_RESTART ss_t },0x0) = 0 (0x0)
26.055866597 nanosleep({1.000000000}) = 0 (0x0)
26.055900400 gettimeofday({1201742443.194324},0x0) = 0 (0x0)
26.055940070 poll({0/POLLIN},1,0) = 0 (0x0)
26.055969962 gettimeofday({1201742443.194394},0x0) = 0 (0x0)
26.056009073 clock_gettime(0,{1201742443.194433649}) = 0 (0x0)
26.056240388 sigaction(SIGTSTP,{ SIG_IGN SA_RESTART ss_t },{ 0x800cb2470 SA_RESTART ss_t }) = 0 (0x0)
26.056280896 poll({0/POLLIN},1,0) = 0 (0x0)
26.056334534 poll({0/POLLIN},1,0) = 0 (0x0)
26.056420299 poll({0/POLLIN},1,0) = 0 (0x0)
26.056485112 write(1,"\^[[1;6H6.046s w: 1.000s\^[[4;5"...,305) = 305 (0x131)
26.056516121 sigaction(SIGTSTP,{ 0x800cb2470 SA_RESTART ss_t },0x0) = 0 (0x0)
27.056863372 nanosleep({1.000000000}) = 0 (0x0)
[/truss -o t.txt -p 61629 -d]
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