mirror of
https://github.com/opencontainers/runc.git
synced 2026-07-11 06:03:57 +08:00
Kir Kolyshkin
10ca66bff5
As per - https://github.com/opencontainers/runtime-spec/pull/1253 - https://github.com/opencontainers/runtime-spec/pull/1261 CPU affinity can be set in two ways: 1. When creating/starting a container, in config.json's Process.ExecCPUAffinity, which is when applied to all execs. 2. When running an exec, in process.json's CPUAffinity, which applied to a given exec and overrides the value from (1). Add some basic tests. Note that older kernels (RHEL8, Ubuntu 20.04) change CPU affinity of a process to that of a container's cgroup, as soon as it is moved to that cgroup, while newer kernels (Ubuntu 24.04, Fedora 41) don't do that. Because of the above, - it's impossible to really test initial CPU affinity without adding debug logging to libcontainer/nsenter; - for older kernels, there can be a brief moment when exec's affinity is different than either initial or final affinity being set; - exec's final CPU affinity, if not specified, can be different depending on the kernel, therefore we don't test it. Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
41 lines
1018 B
C
41 lines
1018 B
C
#ifndef NSENTER_LOG_H
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#define NSENTER_LOG_H
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#include <stdbool.h>
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#include <stdio.h>
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/*
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* Log levels are the same as in logrus.
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*/
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#define PANIC 0
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#define FATAL 1
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#define ERROR 2
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#define WARNING 3
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#define INFO 4
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#define DEBUG 5
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#define TRACE 6
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/*
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* Sets up logging by getting log fd and log level from the environment,
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* if available.
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*/
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void setup_logpipe(void);
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bool log_enabled_for(int level);
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void write_log(int level, const char *format, ...) __attribute__((format(printf, 2, 3)));
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extern int logfd;
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#define bail(fmt, ...) \
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do { \
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if (logfd < 0) \
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fprintf(stderr, "FATAL: " fmt ": %m\n", \
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##__VA_ARGS__); \
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else \
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write_log(FATAL, fmt ": %m", ##__VA_ARGS__); \
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exit(1); \
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} while(0)
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#endif /* NSENTER_LOG_H */
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