ccfeeef59d
Backport the patches for this issue: https://bugzilla.redhat.com/show_bug.cgi?id=1819868 We met such an issue: When testing a large number of pods (> 230), occasionally observed a number of issues related to systemd process: systemd ran continually 90-100% cpu usage systemd memory usage started increasing rapidly (20GB/hour) systemctl commands would always timeout (Failed to get properties: Connection timed out) sm services failed and can't recover: open-ldap, registry-token-server, docker-distribution, etcd new pods can't start, and got stuck in state ContainerCreating Those patches work to prevent excessive /proc/1/mountinfo reparsing. It has been verified that those patches can improve this performance greatly. 16 commits are listed in sequence (from [1] to [16]) at below link for the issue: https://github.com/systemd-rhel/rhel-8/pull/154/commits [16](10)core: prevent excessive /proc/self/mountinfo parsing [15][Dropped-6]test: add ratelimiting test [14](9)sd-event: add ability to ratelimit event sources [13](8)sd-event: increase n_enabled_child_sources just once [12](7)sd-event: update state at the end in event_source_enable [11](6)sd-event: remove earliest_index/latest_index into common part of event source objects [10][Dropped-5]sd-event: follow coding style with naming return parameter [9] [Dropped-4]sd-event: ref event loop while in sd_event_prepare() ot sd_event_run() [8] (5)sd-event: refuse running default event loops in any other thread than the one they are default for [7] [Dropped-3]sd-event: let's suffix last_run/last_log with "_usec" [6] [Dropped-2]sd-event: fix delays assert brain-o (#17790) [5] (4)sd-event: split out code to add/remove timer event sources to earliest/latest prioq [4] (3)sd-event: split clock data allocation out of sd_event_add_time() [3] [Dropped-1]sd-event: mention that two debug logged events are ignored [2] (2)sd-event: split out enable and disable codepaths from sd_event_source_set_enabled() [1] (1)sd-event: split out helper functions for reshuffling prioqs I ported 10 of them back (from (1) to (10)) to fix this issue and dropped the other 6 (from [Dropped-1] to [Dropped-6]) for those reasons: [Dropped-1]Only changes error log. [Dropped-2]Fixes a bug introduced in a commit which doesn't exist in this version. [Dropped-3]Only changes vars' names and there is no functional change. [Dropped-4]More commits are needed for merging it, while I don't see any help on adding the rate-limiting ability. [Dropped-5]Change coding style for a function which isn't really used by anyone. [Dropped-6]Add test cases. Closes-Bug: #1924686 Signed-off-by: Li Zhou <li.zhou@windriver.com> Change-Id: Ia4c8f162cb1a47b40d1b26cf4d604976b97e92d6
74 lines
2.5 KiB
Diff
74 lines
2.5 KiB
Diff
From 5e365321f3006d44f57bb27ff9de96ca01c1104a Mon Sep 17 00:00:00 2001
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From: Evgeny Vereshchagin <evvers@ya.ru>
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Date: Sun, 22 Nov 2015 06:41:31 +0000
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Subject: [PATCH 08/20] sd-event: use prioq_ensure_allocated where possible
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[commit c983e776c4e7e2ea6e1990123d215e639deb353b from
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https://github.com/systemd-rhel/rhel-8/]
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Signed-off-by: Li Zhou <li.zhou@windriver.com>
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---
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src/libsystemd/sd-event/sd-event.c | 30 +++++++++++-------------------
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1 file changed, 11 insertions(+), 19 deletions(-)
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diff --git a/src/libsystemd/sd-event/sd-event.c b/src/libsystemd/sd-event/sd-event.c
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index 2e07478..7074520 100644
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--- a/src/libsystemd/sd-event/sd-event.c
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+++ b/src/libsystemd/sd-event/sd-event.c
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@@ -442,11 +442,9 @@ _public_ int sd_event_new(sd_event** ret) {
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e->original_pid = getpid();
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e->perturb = USEC_INFINITY;
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- e->pending = prioq_new(pending_prioq_compare);
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- if (!e->pending) {
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- r = -ENOMEM;
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+ r = prioq_ensure_allocated(&e->pending, pending_prioq_compare);
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+ if (r < 0)
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goto fail;
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- }
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e->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
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if (e->epoll_fd < 0) {
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@@ -1096,17 +1094,13 @@ _public_ int sd_event_add_time(
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d = event_get_clock_data(e, type);
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assert(d);
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- if (!d->earliest) {
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- d->earliest = prioq_new(earliest_time_prioq_compare);
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- if (!d->earliest)
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- return -ENOMEM;
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- }
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+ r = prioq_ensure_allocated(&d->earliest, earliest_time_prioq_compare);
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+ if (r < 0)
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+ return r;
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- if (!d->latest) {
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- d->latest = prioq_new(latest_time_prioq_compare);
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- if (!d->latest)
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- return -ENOMEM;
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- }
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+ r = prioq_ensure_allocated(&d->latest, latest_time_prioq_compare);
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+ if (r < 0)
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+ return r;
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if (d->fd < 0) {
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r = event_setup_timer_fd(e, d, clock);
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@@ -1357,11 +1351,9 @@ _public_ int sd_event_add_exit(
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assert_return(e->state != SD_EVENT_FINISHED, -ESTALE);
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assert_return(!event_pid_changed(e), -ECHILD);
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- if (!e->exit) {
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- e->exit = prioq_new(exit_prioq_compare);
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- if (!e->exit)
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- return -ENOMEM;
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- }
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+ r = prioq_ensure_allocated(&e->exit, exit_prioq_compare);
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+ if (r < 0)
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+ return r;
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s = source_new(e, !ret, SOURCE_EXIT);
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if (!s)
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--
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2.17.1
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