Date: Tue, 20 Sep 2016 23:38:54 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Konstantin Belousov <kostikbel@gmail.com> Cc: John Baldwin <jhb@freebsd.org>, freebsd-stable@freebsd.org Subject: Re: nginx and FreeBSD11 Message-ID: <20160920203853.GR2840@zxy.spb.ru> In-Reply-To: <20160920201925.GI38409@kib.kiev.ua> References: <20160907191348.GD22212@zxy.spb.ru> <1823460.vTm8IvUQsF@ralph.baldwin.cx> <20160918162241.GE2960@zxy.spb.ru> <2122051.7RxZBKUSFc@ralph.baldwin.cx> <20160920065244.GO2840@zxy.spb.ru> <20160920192053.GP2840@zxy.spb.ru> <20160920201925.GI38409@kib.kiev.ua>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Sep 20, 2016 at 11:19:25PM +0300, Konstantin Belousov wrote:
> On Tue, Sep 20, 2016 at 10:20:53PM +0300, Slawa Olhovchenkov wrote:
> > On Tue, Sep 20, 2016 at 09:52:44AM +0300, Slawa Olhovchenkov wrote:
> >
> > > On Mon, Sep 19, 2016 at 06:05:46PM -0700, John Baldwin wrote:
> > >
> > > > > > If this panics, then vmspace_switch_aio() is not working for
> > > > > > some reason.
> > > > >
> > > > > I am try using next DTrace script:
> > > > > ====
> > > > > #pragma D option dynvarsize=64m
> > > > >
> > > > > int req[struct vmspace *, void *];
> > > > > self int trace;
> > > > >
> > > > > syscall:freebsd:aio_read:entry
> > > > > {
> > > > > this->aio = *(struct aiocb *)copyin(arg0, sizeof(struct aiocb));
> > > > > req[curthread->td_proc->p_vmspace, this->aio.aio_buf] = curthread->td_proc->p_pid;
> > > > > }
> > > > >
> > > > > fbt:kernel:aio_process_rw:entry
> > > > > {
> > > > > self->job = args[0];
> > > > > self->trace = 1;
> > > > > }
> > > > >
> > > > > fbt:kernel:aio_process_rw:return
> > > > > /self->trace/
> > > > > {
> > > > > req[self->job->userproc->p_vmspace, self->job->uaiocb.aio_buf] = 0;
> > > > > self->job = 0;
> > > > > self->trace = 0;
> > > > > }
> > > > >
> > > > > fbt:kernel:vn_io_fault:entry
> > > > > /self->trace && !req[curthread->td_proc->p_vmspace, args[1]->uio_iov[0].iov_base]/
> > > > > {
> > > > > this->buf = args[1]->uio_iov[0].iov_base;
> > > > > printf("%Y vn_io_fault %p:%p pid %d\n", walltimestamp, curthread->td_proc->p_vmspace, this->buf, req[curthread->td_proc->p_vmspace, this->buf]);
> > > > > }
> > > > > ===
> > > > >
> > > > > And don't got any messages near nginx core dump.
> > > > > What I can check next?
> > > > > May be check context/address space switch for kernel process?
> > > >
> > > > Which CPU are you using?
> > >
> > > CPU: Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz (2000.04-MHz K8-class CPU)
> Is this sandy bridge ?
Sandy Bridge EP
> Show me first 100 lines of the verbose dmesg,
After day or two, after end of this test run -- I am need to enable verbose.
> I want to see cpu features lines. In particular, does you CPU support
> the INVPCID feature.
CPU: Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz (2000.05-MHz K8-class CPU)
Origin="GenuineIntel" Id=0x206d7 Family=0x6 Model=0x2d Stepping=7
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0x1fbee3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX>
AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
AMD Features2=0x1<LAHF>
XSAVE Features=0x1<XSAVEOPT>
VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID
TSC: P-state invariant, performance statistics
I am don't see this feature before E5v3:
CPU: Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz (2600.06-MHz K8-class CPU)
Origin="GenuineIntel" Id=0x306e4 Family=0x6 Model=0x3e Stepping=4
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0x7fbee3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND>
AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
AMD Features2=0x1<LAHF>
Structured Extended Features=0x281<FSGSBASE,SMEP,ERMS>
XSAVE Features=0x1<XSAVEOPT>
VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID,VID,PostIntr
TSC: P-state invariant, performance statistics
(don't run 11.0 on this CPU)
CPU: Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz (2600.05-MHz K8-class CPU)
Origin="GenuineIntel" Id=0x306f2 Family=0x6 Model=0x3f Stepping=2
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0x7ffefbff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,SDBG,FMA,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND>
AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
AMD Features2=0x21<LAHF,ABM>
Structured Extended Features=0x37ab<FSGSBASE,TSCADJ,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,PQM,NFPUSG>
XSAVE Features=0x1<XSAVEOPT>
VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID,VID,PostIntr
TSC: P-state invariant, performance statistics
(11.0 run w/o this issuse)
> Also you may show me the 'sysctl vm.pmap' output.
# sysctl vm.pmap
vm.pmap.pdpe.demotions: 3
vm.pmap.pde.promotions: 172495
vm.pmap.pde.p_failures: 2119294
vm.pmap.pde.mappings: 1927
vm.pmap.pde.demotions: 126192
vm.pmap.pcid_save_cnt: 0
vm.pmap.invpcid_works: 0
vm.pmap.pcid_enabled: 0
vm.pmap.pg_ps_enabled: 1
vm.pmap.pat_works: 1
This is after vm.pmap.pcid_enabled=0 in loader.conf
> > >
> > > > Perhaps try disabling PCID support (I think vm.pmap.pcid_enabled=0 from
> > > > loader prompt or loader.conf)? (Wondering if pmap_activate() is somehow not switching)
> >
> > I am need some more time to test (day or two), but now this is like
> > workaround/solution: 12h runtime and peak hour w/o nginx crash.
> > (vm.pmap.pcid_enabled=0 in loader.conf).
>
> Please try this variation of the previous patch.
and remove vm.pmap.pcid_enabled=0?
> diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c
> index a23468e..f754652 100644
> --- a/sys/vm/vm_map.c
> +++ b/sys/vm/vm_map.c
> @@ -481,6 +481,7 @@ vmspace_switch_aio(struct vmspace *newvm)
> if (oldvm == newvm)
> return;
>
> + spinlock_enter();
> /*
> * Point to the new address space and refer to it.
> */
> @@ -489,6 +490,7 @@ vmspace_switch_aio(struct vmspace *newvm)
>
> /* Activate the new mapping. */
> pmap_activate(curthread);
> + spinlock_exit();
>
> /* Remove the daemon's reference to the old address space. */
> KASSERT(oldvm->vm_refcnt > 1,
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20160920203853.GR2840>