kernel/linux.git/tools/bpf/runqslower, branch v6.1.174

tools: runqslower: Build and use lightweight bootstrap version of bpftool

2022-07-15T19:01:30+00:00

tools/runqslower use bpftool for vmlinux.h, skeleton, and static linking only. So we can use lightweight bootstrap version of bpftool to handle these, and it will be faster. Suggested-by: Andrii Nakryiko Signed-off-by: Pu Lehui Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220714024612.944071-3-pulehui@huawei.com

tools/runqslower: Use libbpf 1.0 API mode instead of RLIMIT_MEMLOCK

2022-04-11T03:17:16+00:00

Explicitly set libbpf 1.0 API mode, then we can avoid using the deprecated RLIMIT_MEMLOCK. Signed-off-by: Yafang Shao Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220409125958.92629-5-laoar.shao@gmail.com

tools/bpf: Rename 'struct event' to avoid naming conflict

2022-01-15T01:21:25+00:00

On ppc64le, trying to build bpf seltests throws the below warning: In file included from runqslower.bpf.c:5: ./runqslower.h:7:8: error: redefinition of 'event' struct event { ^ /home/naveen/linux/tools/testing/selftests/bpf/tools/build/runqslower/vmlinux.h:156602:8: note: previous definition is here struct event { ^ This happens since 'struct event' is defined in drivers/net/ethernet/alteon/acenic.h . Rename the one in runqslower to a more appropriate 'runq_event' to avoid the naming conflict. Signed-off-by: Naveen N. Rao Acked-by: Daniel Borkmann Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/c13cb3767d26257ca4387b8296b632b433a58db6.1641468127.git.naveen.n.rao@linux.vnet.ibm.com

tools/runqslower: Enable cross-building with clang

2021-12-16T20:15:05+00:00

Cross-building using clang requires passing the "-target" flag rather than using the CROSS_COMPILE prefix. Makefile.include transforms CROSS_COMPILE into CLANG_CROSS_FLAGS. Add them to CFLAGS, and erase CROSS_COMPILE for the bpftool build, since it needs to be executed on the host. Signed-off-by: Jean-Philippe Brucker Signed-off-by: Andrii Nakryiko Acked-by: Quentin Monnet Link: https://lore.kernel.org/bpf/20211216163842.829836-6-jean-philippe@linaro.org

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2021-11-18T21:13:16+00:00

Signed-off-by: Jakub Kicinski

tools/runqslower: Fix cross-build

2021-11-13T01:23:16+00:00

Commit be79505caf3f ("tools/runqslower: Install libbpf headers when building") uses the target libbpf to build the host bpftool, which doesn't work when cross-building: make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -C tools/bpf/runqslower O=/tmp/runqslower ... LINK /tmp/runqslower/bpftool/bpftool /usr/bin/ld: /tmp/runqslower/libbpf/libbpf.a(libbpf-in.o): Relocations in generic ELF (EM: 183) /usr/bin/ld: /tmp/runqslower/libbpf/libbpf.a: error adding symbols: file in wrong format collect2: error: ld returned 1 exit status When cross-building, the target architecture differs from the host. The bpftool used for building runqslower is executed on the host, and thus must use a different libbpf than that used for runqslower itself. Remove the LIBBPF_OUTPUT and LIBBPF_DESTDIR parameters, so the bpftool build makes its own library if necessary. In the selftests, pass the host bpftool, already a prerequisite for the runqslower recipe, as BPFTOOL_OUTPUT. The runqslower Makefile will use the bpftool that's already built for selftests instead of making a new one. Fixes: be79505caf3f ("tools/runqslower: Install libbpf headers when building") Signed-off-by: Jean-Philippe Brucker Signed-off-by: Daniel Borkmann Reviewed-by: Quentin Monnet Link: https://lore.kernel.org/bpf/20211112155128.565680-1-jean-philippe@linaro.org Signed-off-by: Alexei Starovoitov

tools/runqslower: Update perf_buffer__new() calls

2021-11-12T00:54:06+00:00

Use v1.0+ compatible variant of perf_buffer__new() call to prepare for deprecation. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20211111053624.190580-9-andrii@kernel.org

tools/runqslower: Install libbpf headers when building

2021-10-08T18:54:15+00:00

API headers from libbpf should not be accessed directly from the library's source directory. Instead, they should be exported with "make install_headers". Let's make sure that runqslower installs the headers properly when building. We use a libbpf_hdrs target to mark the logical dependency on libbpf's headers export for a number of object files, even though the headers should have been exported at this time (since bpftool needs them, and is required to generate the skeleton or the vmlinux.h). When descending from a parent Makefile, the specific output directories for building the library and exporting the headers are configurable with BPFOBJ_OUTPUT and BPF_DESTDIR, respectively. This is in addition to OUTPUT, on top of which those variables are constructed by default. Also adjust the Makefile for the BPF selftests. We pass a number of variables to the "make" invocation, because we want to point runqslower to the (target) libbpf shared with other tools, instead of building its own version. In addition, runqslower relies on (target) bpftool, and we also want to pass the proper variables to its Makefile so that bpftool itself reuses the same libbpf. Signed-off-by: Quentin Monnet Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20211007194438.34443-6-quentin@isovalent.com

tools/runqslower: Use __state instead of state

2021-07-07T16:42:26+00:00

Commit 2f064a59a11f ("sched: Change task_struct::state") renamed task->state to task->__state in task_struct. Fix runqslower to use the new name of the field. Fixes: 2f064a59a11f ("sched: Change task_struct::state") Signed-off-by: SanjayKumar Jeyakumar Signed-off-by: Andrii Nakryiko Acked-by: Yonghong Song Link: https://lore.kernel.org/bpf/20210707052914.21473-1-vjsanjay@gmail.com

tools/runqslower: Allow substituting custom vmlinux.h for the build

2021-03-03T04:14:02+00:00

Just like was done for bpftool and selftests in ec23eb705620 ("tools/bpftool: Allow substituting custom vmlinux.h for the build") and ca4db6389d61 ("selftests/bpf: Allow substituting custom vmlinux.h for selftests build"), allow to provide pre-generated vmlinux.h for runqslower build. Signed-off-by: Andrii Nakryiko Acked-by: Martin KaFai Lau Acked-by: Yonghong Song Link: https://lore.kernel.org/bpf/20210303004010.653954-1-andrii@kernel.org