317 lines
14 KiB
Diff
317 lines
14 KiB
Diff
From 7dd8a2f4d351ce8975c0af122732a2a12697c8cc Mon Sep 17 00:00:00 2001
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From: Kairui Song <kasong@redhat.com>
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Date: Wed, 8 Apr 2020 20:09:38 +0800
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Subject: [PATCH] Add 99memstrack module
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memstrack is a new tool to track the overall memory usage and
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allocation, which can help off load the improve the builtin module
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memory tracing function in dracut.
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With this change, the rd.memdebug=4 behavior is similiar with before,
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but the report is defered to pre-pivot, so the memory usage info
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during the whole initramfs run is traced. And the ourput format is
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changed a bit:
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dracut-pre-pivot[519]: ======== Report format module_summary: ========
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dracut-pre-pivot[519]: Module squashfs using 10.4MB (2658 pages), peak allocation 10.4MB (2671 pages)
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dracut-pre-pivot[519]: Module qxl using 3.4MB (865 pages), peak allocation 3.4MB (880 pages)
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dracut-pre-pivot[519]: Module crc32c_intel using 2.0MB (519 pages), peak allocation 3.0MB (769 pages)
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dracut-pre-pivot[519]: Module serio_raw using 2.0MB (505 pages), peak allocation 3.6MB (918 pages)
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dracut-pre-pivot[519]: Module virtio_console using 1.6MB (416 pages), peak allocation 1.6MB (419 pages)
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... snip ...
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dracut-pre-pivot[519]: ======== Report format module_summary END ========
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It now contains more detail and also includes the peak usage which could
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be more helpful.
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And now it have a rd.memdebug=5, which will print more detail about
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the stack trace of the top memory user, also printed on pri-pivot:
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dracut-pre-pivot[519]: ======== Report format module_top: ========
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dracut-pre-pivot[519]: Top stack usage of module squashfs:
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dracut-pre-pivot[519]: (null) Pages: 2658 (peak: 2671)
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dracut-pre-pivot[519]: (null) Pages: 2658 (peak: 2671)
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dracut-pre-pivot[519]: async_page_fault (0xffffffff81a01149) Pages: 1448 (peak: 1461)
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dracut-pre-pivot[519]: do_async_page_fault (0xffffffff8105c509) Pages: 1448 (peak: 1461)
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dracut-pre-pivot[519]: do_page_fault (0xffffffff8106296a) Pages: 1448 (peak: 1461)
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dracut-pre-pivot[519]: do_user_addr_fault (0xffffffff810626bd) Pages: 1448 (peak: 1461)
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dracut-pre-pivot[519]: handle_mm_fault (0xffffffff812940c4) Pages: 1448 (peak: 1461)
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dracut-pre-pivot[519]: __handle_mm_fault (0xffffffff81293627) Pages: 1195 (peak: 1208)
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dracut-pre-pivot[519]: __do_fault (0xffffffff8128b07e) Pages: 1195 (peak: 1208)
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dracut-pre-pivot[519]: filemap_fault (0xffffffff8124c0b9) Pages: 1195 (peak: 1208)
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dracut-pre-pivot[519]: __do_page_cache_readahead (0xffffffff812585da) Pages: 1063 (peak: 1076)
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dracut-pre-pivot[519]: read_pages (0xffffffff812583c2) Pages: 1063 (peak: 1076)
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dracut-pre-pivot[519]: squashfs_readpage squashfs (0xffffffffc0022073) Pages: 1039 (peak: 1052)
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dracut-pre-pivot[519]: squashfs_readpage_block squashfs (0xffffffffc0024334) Pages: 744 (peak: 744)
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dracut-pre-pivot[519]: squashfs_copy_cache squashfs (0xffffffffc0021a3f) Pages: 744 (peak: 744)
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dracut-pre-pivot[519]: pagecache_get_page (0xffffffff8124abf7) Pages: 744 (peak: 744)
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dracut-pre-pivot[519]: __page_cache_alloc (0xffffffff81247df6) Pages: 744 (peak: 744)
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dracut-pre-pivot[519]: alloc_pages_current (0xffffffff812cdca7) Pages: 744 (peak: 744)
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dracut-pre-pivot[519]: __alloc_pages_nodemask (0xffffffff812b3107) Pages: 744 (peak: 744)
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dracut-pre-pivot[519]: __alloc_pages_nodemask (0xffffffff812b3107) Pages: 1488 (peak: 1488)
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dracut-pre-pivot[519]: Top stack usage of module qxl:
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dracut-pre-pivot[519]: (null) Pages: 865 (peak: 880)
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dracut-pre-pivot[519]: entry_SYSCALL_64_after_hwframe (0xffffffff81a0008c) Pages: 855 (peak: 858)
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dracut-pre-pivot[519]: do_syscall_64 (0xffffffff81002a5a) Pages: 855 (peak: 858)
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dracut-pre-pivot[519]: __x64_sys_finit_module (0xffffffff8117ccea) Pages: 811 (peak: 811)
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dracut-pre-pivot[519]: __do_sys_finit_module (0xffffffff8117cc6e) Pages: 811 (peak: 811)
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dracut-pre-pivot[519]: load_module (0xffffffff8117c6be) Pages: 802 (peak: 802)
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dracut-pre-pivot[519]: do_init_module (0xffffffff81179e72) Pages: 802 (peak: 802)
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dracut-pre-pivot[519]: do_one_initcall (0xffffffff81000d5a) Pages: 802 (peak: 802)
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dracut-pre-pivot[519]: serio_raw_poll serio_raw (0xffffffffc0200054) Pages: 802 (peak: 802)
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dracut-pre-pivot[519]: __pci_register_driver (0xffffffff81557804) Pages: 802 (peak: 802)
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dracut-pre-pivot[519]: driver_register (0xffffffff8167ed24) Pages: 802 (peak: 802)
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dracut-pre-pivot[519]: bus_add_driver (0xffffffff8167cbb2) Pages: 801 (peak: 801)
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dracut-pre-pivot[519]: driver_attach (0xffffffff8167d28e) Pages: 801 (peak: 801)
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dracut-pre-pivot[519]: bus_for_each_dev (0xffffffff8167b62c) Pages: 801 (peak: 801)
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dracut-pre-pivot[519]: __driver_attach (0xffffffff8167e18f) Pages: 801 (peak: 801)
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dracut-pre-pivot[519]: device_driver_attach (0xffffffff8167e0ed) Pages: 801 (peak: 801)
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dracut-pre-pivot[519]: driver_probe_device (0xffffffff8167de6c) Pages: 801 (peak: 801)
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dracut-pre-pivot[519]: really_probe (0xffffffff8167d9c9) Pages: 801 (peak: 801)
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dracut-pre-pivot[519]: pci_device_probe (0xffffffff81559627) Pages: 801 (peak: 801)
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dracut-pre-pivot[519]: local_pci_probe (0xffffffff81557f98) Pages: 801 (peak: 801)
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dracut-pre-pivot[519]: qxl_pci_probe qxl (0xffffffffc01f0387) Pages: 773 (peak: 773)
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dracut-pre-pivot[519]: drm_fbdev_generic_setup drm_kms_helper (0xffffffffc01b30c5) Pages: 773 (peak: 773)
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dracut-pre-pivot[519]: drm_fbdev_client_hotplug drm_kms_helper (0xffffffffc01b2656) Pages: 773 (peak: 773)
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dracut-pre-pivot[519]: __drm_fb_helper_initial_config_and_unlock drm_kms_helper (0xffffffffc01b1a28) Pages: 770 (peak: 770)
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dracut-pre-pivot[519]: drm_fb_helper_generic_probe drm_kms_helper (0xffffffffc01b2fa5) Pages: 770 (peak: 770)
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dracut-pre-pivot[519]: vzalloc (0xffffffff812aa39c) Pages: 770 (peak: 770)
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dracut-pre-pivot[519]: __vmalloc_node_range (0xffffffff812aa200) Pages: 768 (peak: 768)
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... snip ...
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======== Report format module_top END ========
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This could be very helpful for debuging memory usage issues.
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---
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dracut.cmdline.7.asc | 16 ++++++++++------
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dracut.spec | 2 ++
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modules.d/99base/dracut-lib.sh | 2 +-
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modules.d/99memstrack/memstrack-report.sh | 23 +++++++++++++++++++++++
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modules.d/99memstrack/memstrack-start.sh | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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modules.d/99memstrack/memstrack.service | 13 +++++++++++++
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modules.d/99memstrack/module-setup.sh | 27 +++++++++++++++++++++++++++
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7 files changed, 144 insertions(+), 7 deletions(-)
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diff --git a/dracut.cmdline.7.asc b/dracut.cmdline.7.asc
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index c53601ea..4d4970c8 100644
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--- a/dracut.cmdline.7.asc
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+++ b/dracut.cmdline.7.asc
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@@ -188,8 +188,8 @@ It should be attached to any report about dracut problems.
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_/run/initramfs/init.log_.
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If "quiet" is set, it also logs to the console.
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-**rd.memdebug=[0-3]**::
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- Print memory usage info at various points, set the verbose level from 0 to 4.
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+**rd.memdebug=[0-5]**::
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+ Print memory usage info at various points, set the verbose level from 0 to 5.
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+
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Higher level means more debugging output:
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+
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@@ -198,10 +198,14 @@ It should be attached to any report about dracut problems.
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1 - partial /proc/meminfo
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2 - /proc/meminfo
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3 - /proc/meminfo + /proc/slabinfo
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- 4 - /proc/meminfo + /proc/slabinfo + tracekomem
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- NOTE: tracekomem is a shell script utilizing kernel trace to track
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- the rough total memory consumption of kernel modules during
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- loading. It may override other trace configurations.
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+ 4 - /proc/meminfo + /proc/slabinfo + memstrack summary
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+ NOTE: memstrack is a memory tracing tool that tracks the total memory
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+ consumption, and peak memory consumption of each kernel modules
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+ and userspace progress during the whole initramfs runtime, report
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+ is genereted and the end of initramsfs run.
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+ 5 - /proc/meminfo + /proc/slabinfo + memstrack (with top memory stacktrace)
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+ NOTE: memstrack (with top memory stacktrace) will print top memory
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+ allocation stack traces during the whole initramfs runtime.
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----
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**rd.break**::
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diff --git a/dracut.spec b/dracut.spec
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index 0369dde6..1eb47402 100644
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--- a/dracut.spec
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+++ b/dracut.spec
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@@ -77,6 +77,7 @@ Requires: xz
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Requires: gzip
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%if 0%{?fedora} || 0%{?rhel}
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+Recommends: memstrack
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Recommends: hardlink
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Recommends: pigz
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Recommends: kpartx
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@@ -403,6 +404,7 @@ install -m 0755 51-dracut-rescue-postinst.sh $RPM_BUILD_ROOT%{_sysconfdir}/kerne
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%{dracutlibdir}/modules.d/98syslog
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%{dracutlibdir}/modules.d/98usrmount
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%{dracutlibdir}/modules.d/99base
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+%{dracutlibdir}/modules.d/99memstrack
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%{dracutlibdir}/modules.d/99fs-lib
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%{dracutlibdir}/modules.d/99shutdown
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%attr(0644,root,root) %ghost %config(missingok,noreplace) %{_localstatedir}/log/dracut.log
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diff --git a/modules.d/99base/dracut-lib.sh b/modules.d/99base/dracut-lib.sh
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index b7020892..e602bacb 100755
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--- a/modules.d/99base/dracut-lib.sh
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+++ b/modules.d/99base/dracut-lib.sh
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@@ -1187,7 +1187,7 @@ are_lists_eq() {
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setmemdebug() {
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if [ -z "$DEBUG_MEM_LEVEL" ]; then
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- export DEBUG_MEM_LEVEL=$(getargnum 0 0 3 rd.memdebug)
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+ export DEBUG_MEM_LEVEL=$(getargnum 0 0 5 rd.memdebug)
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fi
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}
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diff --git a/modules.d/99memstrack/memstrack-report.sh b/modules.d/99memstrack/memstrack-report.sh
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new file mode 100755
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index 00000000..241e8621
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--- /dev/null
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+++ b/modules.d/99memstrack/memstrack-report.sh
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@@ -0,0 +1,23 @@
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+#!/usr/bin/env bash
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+. /lib/dracut-lib.sh
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+
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+if ! [ "$DEBUG_MEM_LEVEL" -ge 4 ]; then
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+ exit 0
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+fi
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+
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+if type -P systemctl >/dev/null; then
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+ systemctl stop memstrack.service
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+else
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+ get_pid_of_tracer () {
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+ local _user _pid _rest
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+ read _user _pid _rest <<< $(ps aux | grep [m]emstrack | head -1)
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+ echo $_pid
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+ }
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+
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+ kill -s INT $(get_pid_of_tracer)
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+ while [[ -n $(get_pid_of_tracer) ]]; do
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+ sleep 1
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+ done
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+fi
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+
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+cat /.memstrack
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diff --git a/modules.d/99memstrack/memstrack-start.sh b/modules.d/99memstrack/memstrack-start.sh
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new file mode 100755
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index 00000000..5aa73efe
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--- /dev/null
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+++ b/modules.d/99memstrack/memstrack-start.sh
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@@ -0,0 +1,68 @@
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+#!/bin/sh
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+# Mount kernel debug fs so debug tools can work.
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+# memdebug=4 and memdebug=5 requires debug fs to be mounted.
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+# And there is no need to umount it.
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+
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+type getargnum >/dev/null 2>&1 || . /lib/dracut-lib.sh
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+
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+# "sys/kernel/tracing" has the priority if exists.
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+get_trace_base() {
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+ # trace access through debugfs would be obsolete if "/sys/kernel/tracing" is available.
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+ if [ -d "/sys/kernel/tracing" ]; then
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+ echo "/sys/kernel"
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+ else
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+ echo "/sys/kernel/debug"
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+ fi
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+}
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+
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+is_debugfs_ready() {
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+ [ -f "$(get_trace_base)/tracing/trace" ]
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+}
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+
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+prepare_debugfs() {
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+ local trace_base
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+
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+ trace_base=$(get_trace_base)
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+ # old debugfs interface case.
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+ if ! [ -d "$trace_base/tracing" ]; then
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+ mount none -t debugfs $trace_base
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+ # new tracefs interface case.
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+ elif ! [ -f "$trace_base/tracing/trace" ]; then
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+ mount none -t tracefs "$trace_base/tracing"
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+ fi
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+
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+ if ! [ -f "$trace_base/tracing/trace" ]; then
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+ echo "WARN: failed to mount debugfs"
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+ return 1
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+ fi
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+}
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+
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+if ! is_debugfs_ready ; then
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+ prepare_debugfs
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+fi
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+
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+if [ -n "$DEBUG_MEM_LEVEL" ]; then
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+ if [ "$DEBUG_MEM_LEVEL" -ge 5 ]; then
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+ echo "memstrack - will report kernel module memory usage summary and top allocation stack"
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+ memstrack --report module_summary,module_top --notui --throttle 80 -o /.memstrack &
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+ elif [ "$DEBUG_MEM_LEVEL" -ge 4 ]; then
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+ echo "memstrack - will report memory usage summary"
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+ memstrack --report module_summary --notui --throttle 80 -o /.memstrack &
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+ else
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+ exit 0;
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+ fi
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+fi
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+
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+PID=$!
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+RET=$?
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+
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+if [ $RET -ne 0 ]; then
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+ echo "Failed to start memstrack, exit status: $RET"
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+ exit $RET
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+fi
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+
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+# Wait a second for memstrack to setup everything, avoid missing any event
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+sleep 1
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+
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+echo $PID > /run/memstrack.pid
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+disown
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diff --git a/modules.d/99memstrack/memstrack.service b/modules.d/99memstrack/memstrack.service
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new file mode 100644
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index 00000000..6b47adef
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--- /dev/null
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+++ b/modules.d/99memstrack/memstrack.service
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@@ -0,0 +1,13 @@
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+[Unit]
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+Description=Memstrack Anylazing Service
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+DefaultDependencies=no
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+Before=dracut-cmdline.service systemd-udevd.service local-fs-pre.target
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+IgnoreOnIsolate=true
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+
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+[Service]
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+Type=simple
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+ExecStart=/bin/memstrack-start
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+PIDFile=/run/memstrack.pid
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+StandardInput=null
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+StandardOutput=syslog+console
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+StandardError=syslog+console
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diff --git a/modules.d/99memstrack/module-setup.sh b/modules.d/99memstrack/module-setup.sh
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new file mode 100755
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index 00000000..d5bacb4d
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--- /dev/null
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+++ b/modules.d/99memstrack/module-setup.sh
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@@ -0,0 +1,27 @@
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+#!/usr/bin/bash
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+
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+check() {
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+ if type -P memstrack >/dev/null; then
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+ dinfo "memstrack is available"
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+ return 0
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+ fi
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+
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+ dinfo "memstrack is not available"
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+ dinfo "If you need to use rd.memdebug>=4, please install memstrack"
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+
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+ return 1
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+}
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+
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+depends() {
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+ return 0
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+}
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+
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+install() {
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+ inst "/bin/memstrack" "/bin/memstrack"
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+
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+ inst "$moddir/memstrack-start.sh" "/bin/memstrack-start"
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+ inst_hook cleanup 99 "$moddir/memstrack-report.sh"
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+
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+ inst "$moddir/memstrack.service" "$systemdsystemunitdir/memstrack.service"
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+ systemctl -q --root "$initdir" add-wants initrd.target memstrack.service
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+}
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