mirror of
https://github.com/Fishwaldo/linux-bl808.git
synced 2025-03-18 04:54:52 +00:00
perf tool fixes for v5.19, 1st batch:
- Don't set data source if it's not a memory operation in ARM SPE (Statistical Profiling Extensions). - Fix handling of exponent floating point values in perf stat expressions. - Don't leak fd on failure on libperf open. - Fix 'perf test' CPU topology test for PPC guest systems. - Fix undefined behaviour on breakpoint account 'perf test' entry. - Record only user callchains on the "Check ARM64 callgraphs are complete in FP mode" 'perf test' entry. - Fix "perf stat CSV output linter" test on s390. - Sync batch of kernel headers with tools/perf/. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQR2GiIUctdOfX2qHhGyPKLppCJ+JwUCYq93OQAKCRCyPKLppCJ+ Jy0RAQD+B7rvd/4VcbLY7hJkhH4h8C2J4Le59Owq3W8TZTTNDgEAupY1IDPnJlWZ BxIkcRKh0+aB6tVGMKIASlWs3ugc+wQ= =Ym7P -----END PGP SIGNATURE----- Merge tag 'perf-tools-fixes-for-v5.19-2022-06-19' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux Pull perf tool fixes from Arnaldo Carvalho de Melo: - Don't set data source if it's not a memory operation in ARM SPE (Statistical Profiling Extensions). - Fix handling of exponent floating point values in perf stat expressions. - Don't leak fd on failure on libperf open. - Fix 'perf test' CPU topology test for PPC guest systems. - Fix undefined behaviour on breakpoint account 'perf test' entry. - Record only user callchains on the "Check ARM64 callgraphs are complete in FP mode" 'perf test' entry. - Fix "perf stat CSV output linter" test on s390. - Sync batch of kernel headers with tools/perf/. * tag 'perf-tools-fixes-for-v5.19-2022-06-19' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: tools headers UAPI: Sync linux/prctl.h with the kernel sources perf metrics: Ensure at least 1 id per metric tools headers arm64: Sync arm64's cputype.h with the kernel sources tools headers UAPI: Sync x86's asm/kvm.h with the kernel sources perf arm-spe: Don't set data source if it's not a memory operation perf expr: Allow exponents on floating point values perf test topology: Use !strncmp(right platform) to fix guest PPC comparision check perf test: Record only user callchains on the "Check Arm64 callgraphs are complete in fp mode" test perf beauty: Update copy of linux/socket.h with the kernel sources perf test: Fix variable length array undefined behavior in bp_account libperf evsel: Open shouldn't leak fd on failure perf test: Fix "perf stat CSV output linter" test on s390 perf unwind: Fix uninitialized variable
This commit is contained in:
Linus Torvalds
commit
c5b3a0946b
15 changed files with 125 additions and 105 deletions
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|
@ -36,7 +36,7 @@
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|||
#define MIDR_VARIANT(midr) \
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(((midr) & MIDR_VARIANT_MASK) >> MIDR_VARIANT_SHIFT)
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#define MIDR_IMPLEMENTOR_SHIFT 24
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#define MIDR_IMPLEMENTOR_MASK (0xff << MIDR_IMPLEMENTOR_SHIFT)
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#define MIDR_IMPLEMENTOR_MASK (0xffU << MIDR_IMPLEMENTOR_SHIFT)
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#define MIDR_IMPLEMENTOR(midr) \
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(((midr) & MIDR_IMPLEMENTOR_MASK) >> MIDR_IMPLEMENTOR_SHIFT)
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@ -118,6 +118,10 @@
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#define APPLE_CPU_PART_M1_ICESTORM 0x022
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#define APPLE_CPU_PART_M1_FIRESTORM 0x023
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#define APPLE_CPU_PART_M1_ICESTORM_PRO 0x024
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#define APPLE_CPU_PART_M1_FIRESTORM_PRO 0x025
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#define APPLE_CPU_PART_M1_ICESTORM_MAX 0x028
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#define APPLE_CPU_PART_M1_FIRESTORM_MAX 0x029
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#define MIDR_CORTEX_A53 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A53)
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#define MIDR_CORTEX_A57 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A57)
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@ -164,6 +168,10 @@
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#define MIDR_HISI_TSV110 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_TSV110)
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#define MIDR_APPLE_M1_ICESTORM MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_ICESTORM)
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#define MIDR_APPLE_M1_FIRESTORM MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_FIRESTORM)
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#define MIDR_APPLE_M1_ICESTORM_PRO MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_ICESTORM_PRO)
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#define MIDR_APPLE_M1_FIRESTORM_PRO MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_FIRESTORM_PRO)
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#define MIDR_APPLE_M1_ICESTORM_MAX MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_ICESTORM_MAX)
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#define MIDR_APPLE_M1_FIRESTORM_MAX MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_FIRESTORM_MAX)
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/* Fujitsu Erratum 010001 affects A64FX 1.0 and 1.1, (v0r0 and v1r0) */
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#define MIDR_FUJITSU_ERRATUM_010001 MIDR_FUJITSU_A64FX
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@ -172,7 +180,7 @@
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#ifndef __ASSEMBLY__
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#include "sysreg.h"
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#include <asm/sysreg.h>
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#define read_cpuid(reg) read_sysreg_s(SYS_ ## reg)
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@ -428,11 +428,12 @@ struct kvm_sync_regs {
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struct kvm_vcpu_events events;
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};
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#define KVM_X86_QUIRK_LINT0_REENABLED (1 << 0)
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#define KVM_X86_QUIRK_CD_NW_CLEARED (1 << 1)
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#define KVM_X86_QUIRK_LAPIC_MMIO_HOLE (1 << 2)
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#define KVM_X86_QUIRK_OUT_7E_INC_RIP (1 << 3)
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#define KVM_X86_QUIRK_MISC_ENABLE_NO_MWAIT (1 << 4)
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#define KVM_X86_QUIRK_LINT0_REENABLED (1 << 0)
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#define KVM_X86_QUIRK_CD_NW_CLEARED (1 << 1)
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#define KVM_X86_QUIRK_LAPIC_MMIO_HOLE (1 << 2)
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#define KVM_X86_QUIRK_OUT_7E_INC_RIP (1 << 3)
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#define KVM_X86_QUIRK_MISC_ENABLE_NO_MWAIT (1 << 4)
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#define KVM_X86_QUIRK_FIX_HYPERCALL_INSN (1 << 5)
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#define KVM_STATE_NESTED_FORMAT_VMX 0
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#define KVM_STATE_NESTED_FORMAT_SVM 1
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@ -272,6 +272,15 @@ struct prctl_mm_map {
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# define PR_SCHED_CORE_SCOPE_THREAD_GROUP 1
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# define PR_SCHED_CORE_SCOPE_PROCESS_GROUP 2
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/* arm64 Scalable Matrix Extension controls */
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/* Flag values must be in sync with SVE versions */
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#define PR_SME_SET_VL 63 /* set task vector length */
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# define PR_SME_SET_VL_ONEXEC (1 << 18) /* defer effect until exec */
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#define PR_SME_GET_VL 64 /* get task vector length */
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/* Bits common to PR_SME_SET_VL and PR_SME_GET_VL */
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# define PR_SME_VL_LEN_MASK 0xffff
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# define PR_SME_VL_INHERIT (1 << 17) /* inherit across exec */
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#define PR_SET_VMA 0x53564d41
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# define PR_SET_VMA_ANON_NAME 0
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@ -149,23 +149,30 @@ int perf_evsel__open(struct perf_evsel *evsel, struct perf_cpu_map *cpus,
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int fd, group_fd, *evsel_fd;
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evsel_fd = FD(evsel, idx, thread);
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if (evsel_fd == NULL)
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return -EINVAL;
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if (evsel_fd == NULL) {
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err = -EINVAL;
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goto out;
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}
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err = get_group_fd(evsel, idx, thread, &group_fd);
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if (err < 0)
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return err;
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goto out;
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fd = sys_perf_event_open(&evsel->attr,
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threads->map[thread].pid,
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cpu, group_fd, 0);
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if (fd < 0)
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return -errno;
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if (fd < 0) {
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err = -errno;
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goto out;
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}
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*evsel_fd = fd;
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}
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}
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out:
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if (err)
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perf_evsel__close(evsel);
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return err;
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}
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|
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@ -151,11 +151,21 @@ static int detect_ioctl(void)
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static int detect_share(int wp_cnt, int bp_cnt)
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{
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struct perf_event_attr attr;
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int i, fd[wp_cnt + bp_cnt], ret;
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int i, *fd = NULL, ret = -1;
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if (wp_cnt + bp_cnt == 0)
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return 0;
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fd = malloc(sizeof(int) * (wp_cnt + bp_cnt));
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if (!fd)
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return -1;
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for (i = 0; i < wp_cnt; i++) {
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fd[i] = wp_event((void *)&the_var, &attr);
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TEST_ASSERT_VAL("failed to create wp\n", fd[i] != -1);
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if (fd[i] == -1) {
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pr_err("failed to create wp\n");
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goto out;
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}
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}
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for (; i < (bp_cnt + wp_cnt); i++) {
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@ -166,9 +176,11 @@ static int detect_share(int wp_cnt, int bp_cnt)
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ret = i != (bp_cnt + wp_cnt);
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out:
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while (i--)
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close(fd[i]);
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free(fd);
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return ret;
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}
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@ -97,6 +97,8 @@ static int test__expr(struct test_suite *t __maybe_unused, int subtest __maybe_u
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ret |= test(ctx, "2.2 > 2.2", 0);
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ret |= test(ctx, "2.2 < 1.1", 0);
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ret |= test(ctx, "1.1 > 2.2", 0);
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ret |= test(ctx, "1.1e10 < 1.1e100", 1);
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ret |= test(ctx, "1.1e2 > 1.1e-2", 1);
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if (ret) {
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expr__ctx_free(ctx);
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@ -1,48 +0,0 @@
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#!/usr/bin/python
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# SPDX-License-Identifier: GPL-2.0
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import argparse
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import sys
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# Basic sanity check of perf CSV output as specified in the man page.
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# Currently just checks the number of fields per line in output.
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ap = argparse.ArgumentParser()
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ap.add_argument('--no-args', action='store_true')
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ap.add_argument('--interval', action='store_true')
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ap.add_argument('--system-wide-no-aggr', action='store_true')
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ap.add_argument('--system-wide', action='store_true')
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ap.add_argument('--event', action='store_true')
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ap.add_argument('--per-core', action='store_true')
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ap.add_argument('--per-thread', action='store_true')
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ap.add_argument('--per-die', action='store_true')
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ap.add_argument('--per-node', action='store_true')
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ap.add_argument('--per-socket', action='store_true')
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ap.add_argument('--separator', default=',', nargs='?')
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args = ap.parse_args()
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Lines = sys.stdin.readlines()
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def check_csv_output(exp):
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for line in Lines:
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if 'failed' not in line:
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count = line.count(args.separator)
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if count != exp:
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sys.stdout.write(''.join(Lines))
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raise RuntimeError(f'wrong number of fields. expected {exp} in {line}')
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try:
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if args.no_args or args.system_wide or args.event:
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expected_items = 6
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elif args.interval or args.per_thread or args.system_wide_no_aggr:
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expected_items = 7
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elif args.per_core or args.per_socket or args.per_node or args.per_die:
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expected_items = 8
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else:
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ap.print_help()
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raise RuntimeError('No checking option specified')
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check_csv_output(expected_items)
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except:
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sys.stdout.write('Test failed for input: ' + ''.join(Lines))
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raise
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@ -6,20 +6,41 @@
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set -e
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pythonchecker=$(dirname $0)/lib/perf_csv_output_lint.py
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if [ "x$PYTHON" == "x" ]
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then
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if which python3 > /dev/null
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then
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PYTHON=python3
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elif which python > /dev/null
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then
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PYTHON=python
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else
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echo Skipping test, python not detected please set environment variable PYTHON.
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exit 2
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fi
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fi
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function commachecker()
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{
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local -i cnt=0 exp=0
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case "$1"
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in "--no-args") exp=6
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;; "--system-wide") exp=6
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;; "--event") exp=6
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;; "--interval") exp=7
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;; "--per-thread") exp=7
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;; "--system-wide-no-aggr") exp=7
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[ $(uname -m) = "s390x" ] && exp=6
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;; "--per-core") exp=8
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;; "--per-socket") exp=8
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;; "--per-node") exp=8
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;; "--per-die") exp=8
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esac
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|
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while read line
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do
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# Check for lines beginning with Failed
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x=${line:0:6}
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[ "$x" = "Failed" ] && continue
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|
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# Count the number of commas
|
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x=$(echo $line | tr -d -c ',')
|
||||
cnt="${#x}"
|
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# echo $line $cnt
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[ "$cnt" -ne "$exp" ] && {
|
||||
echo "wrong number of fields. expected $exp in $line" 1>&2
|
||||
exit 1;
|
||||
}
|
||||
done
|
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return 0
|
||||
}
|
||||
|
||||
# Return true if perf_event_paranoid is > $1 and not running as root.
|
||||
function ParanoidAndNotRoot()
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||||
|
|
@ -30,7 +51,7 @@ function ParanoidAndNotRoot()
|
|||
check_no_args()
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{
|
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echo -n "Checking CSV output: no args "
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perf stat -x, true 2>&1 | $PYTHON $pythonchecker --no-args
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perf stat -x, true 2>&1 | commachecker --no-args
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echo "[Success]"
|
||||
}
|
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|
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|
|
@ -42,7 +63,7 @@ check_system_wide()
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echo "[Skip] paranoid and not root"
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return
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||||
fi
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perf stat -x, -a true 2>&1 | $PYTHON $pythonchecker --system-wide
|
||||
perf stat -x, -a true 2>&1 | commachecker --system-wide
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echo "[Success]"
|
||||
}
|
||||
|
||||
|
|
@ -55,14 +76,14 @@ check_system_wide_no_aggr()
|
|||
return
|
||||
fi
|
||||
echo -n "Checking CSV output: system wide no aggregation "
|
||||
perf stat -x, -A -a --no-merge true 2>&1 | $PYTHON $pythonchecker --system-wide-no-aggr
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perf stat -x, -A -a --no-merge true 2>&1 | commachecker --system-wide-no-aggr
|
||||
echo "[Success]"
|
||||
}
|
||||
|
||||
check_interval()
|
||||
{
|
||||
echo -n "Checking CSV output: interval "
|
||||
perf stat -x, -I 1000 true 2>&1 | $PYTHON $pythonchecker --interval
|
||||
perf stat -x, -I 1000 true 2>&1 | commachecker --interval
|
||||
echo "[Success]"
|
||||
}
|
||||
|
||||
|
|
@ -70,7 +91,7 @@ check_interval()
|
|||
check_event()
|
||||
{
|
||||
echo -n "Checking CSV output: event "
|
||||
perf stat -x, -e cpu-clock true 2>&1 | $PYTHON $pythonchecker --event
|
||||
perf stat -x, -e cpu-clock true 2>&1 | commachecker --event
|
||||
echo "[Success]"
|
||||
}
|
||||
|
||||
|
|
@ -82,7 +103,7 @@ check_per_core()
|
|||
echo "[Skip] paranoid and not root"
|
||||
return
|
||||
fi
|
||||
perf stat -x, --per-core -a true 2>&1 | $PYTHON $pythonchecker --per-core
|
||||
perf stat -x, --per-core -a true 2>&1 | commachecker --per-core
|
||||
echo "[Success]"
|
||||
}
|
||||
|
||||
|
|
@ -94,7 +115,7 @@ check_per_thread()
|
|||
echo "[Skip] paranoid and not root"
|
||||
return
|
||||
fi
|
||||
perf stat -x, --per-thread -a true 2>&1 | $PYTHON $pythonchecker --per-thread
|
||||
perf stat -x, --per-thread -a true 2>&1 | commachecker --per-thread
|
||||
echo "[Success]"
|
||||
}
|
||||
|
||||
|
|
@ -106,7 +127,7 @@ check_per_die()
|
|||
echo "[Skip] paranoid and not root"
|
||||
return
|
||||
fi
|
||||
perf stat -x, --per-die -a true 2>&1 | $PYTHON $pythonchecker --per-die
|
||||
perf stat -x, --per-die -a true 2>&1 | commachecker --per-die
|
||||
echo "[Success]"
|
||||
}
|
||||
|
||||
|
|
@ -118,7 +139,7 @@ check_per_node()
|
|||
echo "[Skip] paranoid and not root"
|
||||
return
|
||||
fi
|
||||
perf stat -x, --per-node -a true 2>&1 | $PYTHON $pythonchecker --per-node
|
||||
perf stat -x, --per-node -a true 2>&1 | commachecker --per-node
|
||||
echo "[Success]"
|
||||
}
|
||||
|
||||
|
|
@ -130,7 +151,7 @@ check_per_socket()
|
|||
echo "[Skip] paranoid and not root"
|
||||
return
|
||||
fi
|
||||
perf stat -x, --per-socket -a true 2>&1 | $PYTHON $pythonchecker --per-socket
|
||||
perf stat -x, --per-socket -a true 2>&1 | commachecker --per-socket
|
||||
echo "[Success]"
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -43,7 +43,7 @@ CFLAGS="-g -O0 -fno-inline -fno-omit-frame-pointer"
|
|||
cc $CFLAGS $TEST_PROGRAM_SOURCE -o $TEST_PROGRAM || exit 1
|
||||
|
||||
# Add a 1 second delay to skip samples that are not in the leaf() function
|
||||
perf record -o $PERF_DATA --call-graph fp -e cycles//u -D 1000 -- $TEST_PROGRAM 2> /dev/null &
|
||||
perf record -o $PERF_DATA --call-graph fp -e cycles//u -D 1000 --user-callchains -- $TEST_PROGRAM 2> /dev/null &
|
||||
PID=$!
|
||||
|
||||
echo " + Recording (PID=$PID)..."
|
||||
|
|
|
|||
|
|
@ -115,7 +115,7 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
|
|||
* physical_package_id will be set to -1. Hence skip this
|
||||
* test if physical_package_id returns -1 for cpu from perf_cpu_map.
|
||||
*/
|
||||
if (strncmp(session->header.env.arch, "powerpc", 7)) {
|
||||
if (!strncmp(session->header.env.arch, "ppc64le", 7)) {
|
||||
if (cpu__get_socket_id(perf_cpu_map__cpu(map, 0)) == -1)
|
||||
return TEST_SKIP;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -50,6 +50,9 @@ struct linger {
|
|||
struct msghdr {
|
||||
void *msg_name; /* ptr to socket address structure */
|
||||
int msg_namelen; /* size of socket address structure */
|
||||
|
||||
int msg_inq; /* output, data left in socket */
|
||||
|
||||
struct iov_iter msg_iter; /* data */
|
||||
|
||||
/*
|
||||
|
|
@ -62,8 +65,9 @@ struct msghdr {
|
|||
void __user *msg_control_user;
|
||||
};
|
||||
bool msg_control_is_user : 1;
|
||||
__kernel_size_t msg_controllen; /* ancillary data buffer length */
|
||||
bool msg_get_inq : 1;/* return INQ after receive */
|
||||
unsigned int msg_flags; /* flags on received message */
|
||||
__kernel_size_t msg_controllen; /* ancillary data buffer length */
|
||||
struct kiocb *msg_iocb; /* ptr to iocb for async requests */
|
||||
};
|
||||
|
||||
|
|
@ -434,6 +438,7 @@ extern struct file *do_accept(struct file *file, unsigned file_flags,
|
|||
extern int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr,
|
||||
int __user *upeer_addrlen, int flags);
|
||||
extern int __sys_socket(int family, int type, int protocol);
|
||||
extern struct file *__sys_socket_file(int family, int type, int protocol);
|
||||
extern int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen);
|
||||
extern int __sys_connect_file(struct file *file, struct sockaddr_storage *addr,
|
||||
int addrlen, int file_flags);
|
||||
|
|
|
|||
|
|
@ -387,26 +387,16 @@ static int arm_spe__synth_instruction_sample(struct arm_spe_queue *speq,
|
|||
return arm_spe_deliver_synth_event(spe, speq, event, &sample);
|
||||
}
|
||||
|
||||
#define SPE_MEM_TYPE (ARM_SPE_L1D_ACCESS | ARM_SPE_L1D_MISS | \
|
||||
ARM_SPE_LLC_ACCESS | ARM_SPE_LLC_MISS | \
|
||||
ARM_SPE_REMOTE_ACCESS)
|
||||
|
||||
static bool arm_spe__is_memory_event(enum arm_spe_sample_type type)
|
||||
{
|
||||
if (type & SPE_MEM_TYPE)
|
||||
return true;
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
static u64 arm_spe__synth_data_source(const struct arm_spe_record *record)
|
||||
{
|
||||
union perf_mem_data_src data_src = { 0 };
|
||||
|
||||
if (record->op == ARM_SPE_LD)
|
||||
data_src.mem_op = PERF_MEM_OP_LOAD;
|
||||
else
|
||||
else if (record->op == ARM_SPE_ST)
|
||||
data_src.mem_op = PERF_MEM_OP_STORE;
|
||||
else
|
||||
return 0;
|
||||
|
||||
if (record->type & (ARM_SPE_LLC_ACCESS | ARM_SPE_LLC_MISS)) {
|
||||
data_src.mem_lvl = PERF_MEM_LVL_L3;
|
||||
|
|
@ -510,7 +500,11 @@ static int arm_spe_sample(struct arm_spe_queue *speq)
|
|||
return err;
|
||||
}
|
||||
|
||||
if (spe->sample_memory && arm_spe__is_memory_event(record->type)) {
|
||||
/*
|
||||
* When data_src is zero it means the record is not a memory operation,
|
||||
* skip to synthesize memory sample for this case.
|
||||
*/
|
||||
if (spe->sample_memory && data_src) {
|
||||
err = arm_spe__synth_mem_sample(speq, spe->memory_id, data_src);
|
||||
if (err)
|
||||
return err;
|
||||
|
|
|
|||
|
|
@ -91,7 +91,7 @@ static int literal(yyscan_t scanner)
|
|||
}
|
||||
%}
|
||||
|
||||
number ([0-9]+\.?[0-9]*|[0-9]*\.?[0-9]+)
|
||||
number ([0-9]+\.?[0-9]*|[0-9]*\.?[0-9]+)(e-?[0-9]+)?
|
||||
|
||||
sch [-,=]
|
||||
spec \\{sch}
|
||||
|
|
|
|||
|
|
@ -1372,6 +1372,7 @@ static int parse_ids(bool metric_no_merge, struct perf_pmu *fake_pmu,
|
|||
|
||||
*out_evlist = NULL;
|
||||
if (!metric_no_merge || hashmap__size(ids->ids) == 0) {
|
||||
bool added_event = false;
|
||||
int i;
|
||||
/*
|
||||
* We may fail to share events between metrics because a tool
|
||||
|
|
@ -1393,8 +1394,16 @@ static int parse_ids(bool metric_no_merge, struct perf_pmu *fake_pmu,
|
|||
if (!tmp)
|
||||
return -ENOMEM;
|
||||
ids__insert(ids->ids, tmp);
|
||||
added_event = true;
|
||||
}
|
||||
}
|
||||
if (!added_event && hashmap__size(ids->ids) == 0) {
|
||||
char *tmp = strdup("duration_time");
|
||||
|
||||
if (!tmp)
|
||||
return -ENOMEM;
|
||||
ids__insert(ids->ids, tmp);
|
||||
}
|
||||
}
|
||||
ret = metricgroup__build_event_string(&events, ids, modifier,
|
||||
has_constraint);
|
||||
|
|
|
|||
|
|
@ -174,7 +174,7 @@ static int elf_section_address_and_offset(int fd, const char *name, u64 *address
|
|||
Elf *elf;
|
||||
GElf_Ehdr ehdr;
|
||||
GElf_Shdr shdr;
|
||||
int ret;
|
||||
int ret = -1;
|
||||
|
||||
elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
|
||||
if (elf == NULL)
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue