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Mon, 09 Dec 2024 04:43:19 +0000 Date: Mon, 9 Dec 2024 05:43:18 +0100 From: Petr Vorel To: Li Wang Message-ID: <20241209044318.GA180329@pevik> References: <20241207085754.159597-1-liwang@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20241207085754.159597-1-liwang@redhat.com> X-Spamd-Result: default: False [-3.50 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_RHS_NOT_FQDN(0.50)[]; HAS_REPLYTO(0.30)[pvorel@suse.cz]; NEURAL_HAM_SHORT(-0.20)[-0.999]; MIME_GOOD(-0.10)[text/plain]; RCVD_VIA_SMTP_AUTH(0.00)[]; MISSING_XM_UA(0.00)[]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; RCPT_COUNT_THREE(0.00)[3]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.cz:replyto]; REPLYTO_EQ_FROM(0.00)[] X-Virus-Scanned: clamav-milter 1.0.3 at in-7.smtp.seeweb.it X-Virus-Status: Clean Subject: Re: [LTP] [Patch V2] lib: multiply the max_runtime if detect kernel debug options X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Petr Vorel Cc: ltp@lists.linux.it Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Hi Li, Cyril, > The method adjusts the max_runtime for test cases by multiplying > it by a factor (4x) if any debug kernel options are detected. > Debug kernel configurations (such as CONFIG_KASAN, CONFIG_PROVE_LOCKING, etc.) > are known to degrade performance, and this adjustment ensures > that tests do not fail prematurely due to timeouts. > As Cyril pointed out that a debug kernel will typically run > slower by a factor of N, and while determining the exact value > of N is challenging, so a reasonable upper bound is sufficient > for practical purposes. > Signed-off-by: Li Wang > --- > Notes: > Hi, @Cyril, @Petr, I have no openSUSE and Ubuntu at my hands, could you > help check if the debug configures are useful to the other two platforms? > Or, should we add any more options there? Thanks. openSUSE debug kernel: $ grep ^CONFIG_DEBUG /boot/config-6.13.0-rc1-1.g492f944-debug # openSUSE Tumbleweed CONFIG_DEBUG_RSEQ=y CONFIG_DEBUG_GPIO=y CONFIG_DEBUG_BUGVERBOSE=y CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_MISC=y CONFIG_DEBUG_INFO=y CONFIG_DEBUG_INFO_DWARF5=y CONFIG_DEBUG_INFO_COMPRESSED_NONE=y CONFIG_DEBUG_INFO_BTF=y CONFIG_DEBUG_INFO_BTF_MODULES=y CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y CONFIG_DEBUG_FS=y CONFIG_DEBUG_FS_ALLOW_ALL=y CONFIG_DEBUG_NET=y CONFIG_DEBUG_PAGEALLOC=y CONFIG_DEBUG_RODATA_TEST=y CONFIG_DEBUG_MEMORY_INIT=y CONFIG_DEBUG_SHIRQ=y CONFIG_DEBUG_RT_MUTEXES=y CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_MUTEXES=y => openSUSE debug kernel would be detected by: CONFIG_DEBUG_NET=y CONFIG_DEBUG_PAGEALLOC=y CONFIG_DEBUG_RT_MUTEXES=y CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_MUTEXES=y => if you want to add more: CONFIG_DEBUG_RSEQ=y CONFIG_DEBUG_GPIO=y CONFIG_DEBUG_RODATA_TEST=y CONFIG_DEBUG_SHIRQ=y Also FYI some options from default kernel (to see which cannot be used): $ grep ^CONFIG_DEBUG /boot/config-6.13.0-rc1-1.g492f944-default # openSUSE Tumbleweed CONFIG_DEBUG_BUGVERBOSE=y CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_MISC=y CONFIG_DEBUG_INFO=y CONFIG_DEBUG_INFO_DWARF5=y CONFIG_DEBUG_INFO_COMPRESSED_NONE=y CONFIG_DEBUG_INFO_BTF=y CONFIG_DEBUG_INFO_BTF_MODULES=y CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y CONFIG_DEBUG_FS=y CONFIG_DEBUG_FS_ALLOW_ALL=y CONFIG_DEBUG_PAGEALLOC=y CONFIG_DEBUG_MEMORY_INIT=y $ grep ^CONFIG_DEBUG /boot/config-6.11.10-amd64 # Debian CONFIG_DEBUG_BUGVERBOSE=y CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_MISC=y CONFIG_DEBUG_INFO=y CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y CONFIG_DEBUG_INFO_COMPRESSED_NONE=y CONFIG_DEBUG_INFO_BTF=y CONFIG_DEBUG_INFO_BTF_MODULES=y CONFIG_DEBUG_FS=y CONFIG_DEBUG_FS_ALLOW_ALL=y CONFIG_DEBUG_WX=y CONFIG_DEBUG_MEMORY_INIT=y CONFIG_DEBUG_LIST=y Do Debian/Ubuntu even have debug kernel? I know only about linux-image-amd64-dbg [1], but that package has just debugging symbols. Which tests should I run on the kernel to see if timeout is ok? Kind regards, Petr [1] https://packages.debian.org/sid/linux-image-amd64-dbg ... > +/* > + * List of debug-kernel config options that may degrade performance when enabled. > + */ > +static const char * const tst_kconf_debug_options[][2] = { > + {"CONFIG_PROVE_LOCKING=y", NULL}, > + {"CONFIG_LOCKDEP=y", NULL}, > + {"CONFIG_DEBUG_SPINLOCK=y", NULL}, > + {"CONFIG_DEBUG_RT_MUTEXES=y", NULL}, > + {"CONFIG_DEBUG_MUTEXES=y", NULL}, > + {"CONFIG_DEBUG_PAGEALLOC=y", NULL}, > + {"CONFIG_KASAN=y", NULL}, > + {"CONFIG_SLUB_RCU_DEBUG=y", NULL}, > + {"CONFIG_TRACE_IRQFLAGS=y", NULL}, > + {"CONFIG_LATENCYTOP=y", NULL}, > + {"CONFIG_DEBUG_NET=y", NULL}, > + {"CONFIG_EXT4_DEBUG=y", NULL}, > + {"CONFIG_QUOTA_DEBUG=y", NULL}, > + {"CONFIG_FAULT_INJECTION=y", NULL}, > + {"CONFIG_DEBUG_OBJECTS=y", NULL}, > + {NULL, NULL} ... -- Mailing list info: https://lists.linux.it/listinfo/ltp