From: Ed Bartosh <ed.bartosh@linux.intel.com>
To: openembedded-core@lists.openembedded.org
Cc: Bruce Ashfield <bruce.ashfield@windriver.com>
Subject: 2.7% build time regression caused by enabling debug/printk.scc KERNEL_FEATURE
Date: Tue, 26 Jul 2016 17:32:44 +0300 [thread overview]
Message-ID: <20160726143244.GA9326@linux.intel.com> (raw)
Hi all,
We've noticed quite big increase of core-image-minimal build time caused by commit
d55b7650d305ffad953dd36595ee6b9aa8df5a72 linux-yocto: Enablei debug/printk.scc KERNEL_FEATURE on qemuall machines.
Here are results of /usr/bin/time -v bitbake core-image-minimal for this
and previous commits:
linux-yocto: Enable debug/printk.scc KERNEL_FEATURE on qemuall machines: d55b7650d305ffad953dd36595ee6b9aa8df5a72
Command being timed: "bitbake core-image-minimal"
User time (seconds): 14966.24
System time (seconds): 3829.23
Percent of CPU this job got: 1212%
Elapsed (wall clock) time (h:mm:ss or m:ss): 25:50.52
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 917592
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 8105
Minor (reclaiming a frame) page faults: 628476540
Voluntary context switches: 26886617
Involuntary context switches: 2033535
Swaps: 0
File system inputs: 3160048
File system outputs: 78417720
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
commit: nativesdk-packagegroup-sdk-host: Add wayland-scanner to the SDK native toolchain: e833508075bcb8f2d1ccddcf46f579aea7a2ab1d
Command being timed: "bitbake core-image-minimal"
User time (seconds): 14526.89
System time (seconds): 3770.74
Percent of CPU this job got: 1193%
Elapsed (wall clock) time (h:mm:ss or m:ss): 25:33.44
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 917792
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 8058
Minor (reclaiming a frame) page faults: 618283939
Voluntary context switches: 26538183
Involuntary context switches: 1859365
Swaps: 0
File system inputs: 3191584
File system outputs: 66411592
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
The total time (user time + system time) incresed by 2.72% which seems quite a lot.
diff of tasks utime shows biggest difference in do_package* tasks. This is probably
due to increased size of packages:
do_bundle_initramfs:utime: 21 | do_bundle_initramfs:utime: 32
do_compile:utime: 47 | do_compile:utime: 51
do_compile_kernelmodules:utime: 39 | do_compile_kernelmodules:utime: 42
do_configure:utime: 20 | do_configure:utime: 24
do_deploy:utime: 38 | do_deploy:utime: 35
do_fetch:utime: 25 | do_fetch:utime: 28
do_install:utime: 26 | do_install:utime: 22
do_kernel_checkout:utime: 21 | do_kernel_checkout:utime: 24
do_kernel_configcheck:utime: 21 | do_kernel_configcheck:utime: 21
do_kernel_configme:utime: 23 | do_kernel_configme:utime: 23
do_kernel_link_images:utime: 24 | do_kernel_link_images:utime: 22
do_kernel_metadata:utime: 25 | do_kernel_metadata:utime: 23
do_package:utime: 396 | do_package:utime: 378
do_packagedata:utime: 35 | do_packagedata:utime: 34
do_package_qa:utime: 460 | do_package_qa:utime: 492
do_package_write_rpm:utime: 431 | do_package_write_rpm:utime: 399
do_patch:utime: 25 | do_patch:utime: 25
do_populate_lic:utime: 30 | do_populate_lic:utime: 29
do_populate_sysroot:utime: 33 | do_populate_sysroot:utime: 30
do_shared_workdir:utime: 24 | do_shared_workdir:utime: 25
do_sizecheck:utime: 23 | do_sizecheck:utime: 21
do_strip:utime: 23 | do_strip:utime: 23
do_uboot_mkimage:utime: 25 | do_uboot_mkimage:utime: 24
do_unpack:utime: 21 | do_unpack:utime: 22
do_validate_branches:utime: 23 | do_validate_branches:utime: 24
There is also quite big increase in consumed disk space by the kernel
and modules:
$ ls -lh ./tmp.bad/work/qemux86-poky-linux/linux-yocto/4.4.14+gitAUTOINC+4800a400d5_8361321fec-r0/image/boot/vmlinux-4.4.14-yocto-standard
-rw-r--r-- 1 ed ed 261M Jul 25 12:39 ./tmp.bad/work/qemux86-poky-linux/linux-yocto/4.4.14+gitAUTOINC+4800a400d5_8361321fec-r0/image/boot/vmlinux-4.4.14-yocto-standard
$ ls -lh ./tmp.prev/work/qemux86-poky-linux/linux-yocto/4.4.14+gitAUTOINC+4800a400d5_8361321fec-r0/image/boot/vmlinux-4.4.14-yocto-standard
-rw-r--r-- 1 ed ed 19M Jul 25 17:34 ./tmp.prev/work/qemux86-poky-linux/linux-yocto/4.4.14+gitAUTOINC+4800a400d5_8361321fec-r0/image/boot/vmlinux-4.4.14-yocto-standard
$ ls -lh tmp.bad/deploy/images/qemux86/modules--4.4.14+git0+4800a400d5_8361321fec-r0-qemux86-20160725092744.tgz
-rw-rw-r-- 2 ed ed 99M Jul 25 12:39 tmp.bad/deploy/images/qemux86/modules--4.4.14+git0+4800a400d5_8361321fec-r0-qemux86-20160725092744.tgz
$ ls -lh tmp.prev/deploy/images/qemux86/modules--4.4.14+git0+4800a400d5_8361321fec-r0-qemux86-20160725105810.tgz
-rw-rw-r-- 1 ed ed 4.3M Jul 25 17:34 tmp.prev/deploy/images/qemux86/modules--4.4.14+git0+4800a400d5_8361321fec-r0-qemux86-20160725105810.tgz
Any thoughts on this? Is it normal or it should be tested further and fixed?
--
Regards,
Ed
next reply other threads:[~2016-07-26 15:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-26 14:32 Ed Bartosh [this message]
2016-07-26 15:28 ` 2.7% build time regression caused by enabling debug/printk.scc KERNEL_FEATURE Bruce Ashfield
2016-07-26 16:19 ` Aníbal Limón
2016-07-26 20:05 ` Aníbal Limón
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