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2024-07-30contrib/plugins/cache.c: Remove redundant check of l2_accessPeter Maydell
In append_stats_line(), we have an expression l2_access ? l2_miss_rate : 0.0 But this is inside an if (l2_access && l2_misses) { ... } block, so Coverity points out that the false part of the ?: is dead code. Remove the unnecessary test. Resolves: Coverity CID 1522458 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20240725164851.1930964-1-peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240729144414.830369-12-alex.bennee@linaro.org>
2024-02-28plugins: remove previous n_vcpus functions from APIPierrick Bouvier
This information is already accessible using qemu_info_t during plugin install. We will introduce another function (qemu_plugin_num_vcpus) which represent how many cpus were enabled, by tracking new cpu indexes. It's a breaking change, so we bump API version. Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20240213094009.150349-2-pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240227144335.1196131-16-alex.bennee@linaro.org>
2023-10-11contrib/plugins: fix coverity warning in cacheAlex Bennée
Coverity complains that appends_stats_line can be fed a 0 leading to the undefined behaviour of a divide by 0. Fixes: CID 1519044 Fixes: CID 1519047 Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20231009164104.369749-24-alex.bennee@linaro.org>
2023-09-07Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into stagingStefan Hajnoczi
* only build util/async-teardown.c when system build is requested * target/i386: fix BQL handling of the legacy FERR interrupts * target/i386: fix memory operand size for CVTPS2PD * target/i386: Add support for AMX-COMPLEX in CPUID enumeration * compile plugins on Darwin * configure and meson cleanups * drop mkvenv support for Python 3.7 and Debian10 * add wrap file for libblkio * tweak KVM stubs # -----BEGIN PGP SIGNATURE----- # # iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmT5t6UUHHBib256aW5p # QHJlZGhhdC5jb20ACgkQv/vSX3jHroMmjwf+MpvVuq+nn+3PqGUXgnzJx5ccA5ne # O9Xy8+1GdlQPzBw/tPovxXDSKn3HQtBfxObn2CCE1tu/4uHWpBA1Vksn++NHdUf2 # P0yoHxGskJu5iYYTtIcNw5cH2i+AizdiXuEjhfNjqD5Y234cFoHnUApt9e3zBvVO # cwGD7WpPuSb4g38hHkV6nKcx72o7b4ejDToqUVZJ2N+RkddSqB03fSdrOru0hR7x # V+lay0DYdFszNDFm05LJzfDbcrHuSryGA91wtty7Fzj6QhR/HBHQCUZJxMB5PI7F # Zy4Zdpu60zxtSxUqeKgIi7UhNFgMcax2Hf9QEqdc/B4ARoBbboh4q4u8kQ== # =dH7/ # -----END PGP SIGNATURE----- # gpg: Signature made Thu 07 Sep 2023 07:44:37 EDT # gpg: using RSA key F13338574B662389866C7682BFFBD25F78C7AE83 # gpg: issuer "pbonzini@redhat.com" # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full] # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [full] # Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83 * tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (51 commits) docs/system/replay: do not show removed command line option subprojects: add wrap file for libblkio sysemu/kvm: Restrict kvm_pc_setup_irq_routing() to x86 targets sysemu/kvm: Restrict kvm_has_pit_state2() to x86 targets sysemu/kvm: Restrict kvm_get_apic_state() to x86 targets sysemu/kvm: Restrict kvm_arch_get_supported_cpuid/msr() to x86 targets target/i386: Restrict declarations specific to CONFIG_KVM target/i386: Allow elision of kvm_hv_vpindex_settable() target/i386: Allow elision of kvm_enable_x2apic() target/i386: Remove unused KVM stubs target/i386/cpu-sysemu: Inline kvm_apic_in_kernel() target/i386/helper: Restrict KVM declarations to system emulation hw/i386/fw_cfg: Include missing 'cpu.h' header hw/i386/pc: Include missing 'cpu.h' header hw/i386/pc: Include missing 'sysemu/tcg.h' header Revert "mkvenv: work around broken pip installations on Debian 10" mkvenv: assume presence of importlib.metadata Python: Drop support for Python 3.7 configure: remove dead code meson: list leftover CONFIG_* symbols ... Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-07contrib/plugins/cache: Fix string formatPhilippe Mathieu-Daudé
This fixes on Darwin: plugins/cache.c:550:28: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat] l1_daccess, ^~~~~~~~~~ plugins/cache.c:551:28: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat] l1_dmisses, ^~~~~~~~~~ plugins/cache.c:553:28: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat] l1_iaccess, ^~~~~~~~~~ plugins/cache.c:554:28: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat] l1_imisses, ^~~~~~~~~~ plugins/cache.c:560:32: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat] l2_access, ^~~~~~~~~ plugins/cache.c:561:32: warning: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat] l2_misses, ^~~~~~~~~ plugins/cache.c:665:52: warning: format specifies type 'long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat] g_string_append_printf(rep, ", %ld, %s\n", insn->l1_dmisses, ~~~ ^~~~~~~~~~~~~~~~ %llu plugins/cache.c:678:52: warning: format specifies type 'long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat] g_string_append_printf(rep, ", %ld, %s\n", insn->l1_imisses, ~~~ ^~~~~~~~~~~~~~~~ %llu plugins/cache.c:695:52: warning: format specifies type 'long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Wformat] g_string_append_printf(rep, ", %ld, %s\n", insn->l2_misses, ~~~ ^~~~~~~~~~~~~~~ %llu Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20230907105004.88600-2-philmd@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-08-31accel/tcg: spelling fixesMichael Tokarev
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> Message-ID: <20230823065335.1919380-18-mjt@tls.msk.ru> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-ID: <20230823065335.1919380-19-mjt@tls.msk.ru> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-07-03plugins: fix memory leak while parsing optionsAlex Bennée
It was hard to track down this leak as it was an internal allocation by glib and the backtraces did not give much away. The autofree was freeing the allocation with g_free() but not taking care of the individual strings. They should have been freed with g_strfreev() instead. Searching the glib source code for the correct string free function led to: G_DEFINE_AUTO_CLEANUP_FREE_FUNC(GStrv, g_strfreev, NULL) and indeed if you read to the bottom of the documentation page you will find: typedef gchar** GStrv; A typedef alias for gchar**. This is mostly useful when used together with g_auto(). So fix up all the g_autofree g_strsplit case that smugly thought they had de-allocation covered. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20230630180423.558337-21-alex.bennee@linaro.org>
2022-12-14Drop more useless casts from void * to pointerMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20221123133811.1398562-1-armbru@redhat.com>
2022-08-01misc: fix commonly doubled up wordsDaniel P. Berrangé
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20220707163720.1421716-5-berrange@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Thomas Huth <thuth@redhat.com>
2021-11-04plugins/cache: make L2 emulation optional through argsMahmoud Mandour
By default L2 is not enabled and is enabled by either using the newly-introduced "l2" boolean argument, or by setting any of the L2 cache parameters using args. On specifying "l2=on", the default cache configuration is used. Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210810134844.166490-5-ma.mandourr@gmail.com> Message-Id: <20211026102234.3961636-17-alex.bennee@linaro.org>
2021-11-04plugins/cache: split command line arguments into name and valueMahmoud Mandour
This way of handling args is more lenient and sets a better framework to parse boolean command line arguments. Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210810134844.166490-4-ma.mandourr@gmail.com> Message-Id: <20211026102234.3961636-16-alex.bennee@linaro.org>
2021-11-04plugins/cache: implement unified L2 cache emulationMahmoud Mandour
This adds an implementation of a simple L2 configuration, in which a unified L2 cache (stores both blocks of instructions and data) is maintained for each core separately, with no inter-core interaction taken in account. The L2 cache is used as a backup for L1 and is only accessed if the wanted block does not exist in L1. In terms of multi-threaded user-space emulation, the same approximation of L1 is done, a static number of caches is maintained, and each and every memory access initiated by a thread will have to go through one of the available caches. An atomic increment is used to maintain the number of L2 misses per instruction. The default cache parameters of L2 caches is: 2MB cache size 16-way associativity 64-byte blocks Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210810134844.166490-3-ma.mandourr@gmail.com> Message-Id: <20211026102234.3961636-15-alex.bennee@linaro.org>
2021-11-04plugins/cache: freed heap-allocated mutexesMahmoud Mandour
Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210810134844.166490-2-ma.mandourr@gmail.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20211026102234.3961636-14-alex.bennee@linaro.org>
2021-09-02plugins/cache: supported multicore cache modellingMahmoud Mandour
Multicore L1 cache modelling is introduced and is supported for both full system emulation and linux-user. For full-system emulation, L1 icache and dcache are maintained for each available core, since this information is exposed to the plugin through `qemu_plugin_n_vcpus()`. For linux-user, a static number of cores is assumed (default 1 core, and can be provided as a plugin argument `cores=N`). Every memory access goes through one of these caches, this approach is taken as it's somewhat akin to what happens on real setup, where a program that dispatches more threads than the available cores, they'll thrash each other Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Message-Id: <20210803151301.123581-2-ma.mandourr@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
2021-07-23plugins/cache: Fixed "function decl. is not a prototype" warningsMahmoud Mandour
Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20210714172151.8494-7-ma.mandourr@gmail.com> Message-Id: <20210720232703.10650-24-alex.bennee@linaro.org>
2021-07-23plugins/cache: limited the scope of a mutex lockMahmoud Mandour
It's not necessary to lock the address translation portion of the vcpu_mem_access callback. Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210714172151.8494-3-ma.mandourr@gmail.com> Message-Id: <20210720232703.10650-23-alex.bennee@linaro.org>
2021-07-23plugins/cache: Fixed a bug with destroying FIFO metadataMahmoud Mandour
This manifests itself when associativity degree is greater than the number of sets and FIFO is used, otherwise it's also a memory leak whenever FIFO was used. Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210714172151.8494-2-ma.mandourr@gmail.com> Message-Id: <20210720232703.10650-22-alex.bennee@linaro.org>
2021-07-14plugins/cache: Added FIFO and LRU eviction policiesMahmoud Mandour
Implemented FIFO and LRU eviction policies. Now one of the three eviction policies can be chosen as an argument. On not specifying an argument, LRU is used by default. Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210623125458.450462-4-ma.mandourr@gmail.com> Message-Id: <20210709143005.1554-39-alex.bennee@linaro.org>
2021-07-14plugins/cache: Enable cache parameterizationMahmoud Mandour
Enabled configuring both icache and dcache parameters using plugin parameters. Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210623125458.450462-3-ma.mandourr@gmail.com> Message-Id: <20210709143005.1554-38-alex.bennee@linaro.org>
2021-07-14plugins: Added a new cache modelling pluginMahmoud Mandour
Added a cache modelling plugin that uses a static configuration used in many of the commercial microprocessors and uses random eviction policy. The purpose of the plugin is to identify the most cache-thrashing instructions for both instruction cache and data cache. Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210623125458.450462-2-ma.mandourr@gmail.com> Message-Id: <20210709143005.1554-37-alex.bennee@linaro.org>
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