fb6e5953dc
Changes in 4.9.271 mm, vmstat: drop zone->lock in /proc/pagetypeinfo tweewide: Fix most Shebang lines scripts: switch explicitly to Python 3 netfilter: x_tables: Use correct memory barriers. NFC: nci: fix memory leak in nci_allocate_device NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() proc: Check /proc/$pid/attr/ writes against file opener net: hso: fix control-request directions mac80211: assure all fragments are encrypted mac80211: prevent mixed key and fragment cache attacks mac80211: properly handle A-MSDUs that start with an RFC 1042 header cfg80211: mitigate A-MSDU aggregation attacks mac80211: drop A-MSDUs on old ciphers mac80211: add fragment cache to sta_info mac80211: check defrag PN against current frame mac80211: prevent attacks on TKIP/WEP as well mac80211: do not accept/forward invalid EAPOL frames mac80211: extend protection against mixed key and fragment cache attacks ath10k: Validate first subframe of A-MSDU before processing the list dm snapshot: properly fix a crash when an origin has no snapshots kgdb: fix gcc-11 warnings harder misc/uss720: fix memory leak in uss720_probe mei: request autosuspend after sending rx flow control staging: iio: cdc: ad7746: avoid overwrite of num_channels iio: adc: ad7793: Add missing error code in ad7793_setup() USB: trancevibrator: fix control-request direction serial: rp2: use 'request_firmware' instead of 'request_firmware_nowait' USB: serial: ti_usb_3410_5052: add startech.com device id USB: serial: option: add Telit LE910-S1 compositions 0x7010, 0x7011 USB: serial: ftdi_sio: add IDs for IDS GmbH Products USB: serial: pl2303: add device id for ADLINK ND-6530 GC net: usb: fix memory leak in smsc75xx_bind spi: Fix use-after-free with devm_spi_alloc_* Bluetooth: cmtp: fix file refcount when cmtp_attach_device fails NFS: fix an incorrect limit in filelayout_decode_layout() NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce() NFSv4: Fix v4.0/v4.1 SEEK_DATA return -ENOTSUPP when set NFS_V4_2 config net/mlx4: Fix EEPROM dump support Revert "net:tipc: Fix a double free in tipc_sk_mcast_rcv" tipc: skb_linearize the head skb when reassembling msgs i2c: s3c2410: fix possible NULL pointer deref on read message after write i2c: i801: Don't generate an interrupt on bus reset perf jevents: Fix getting maximum number of fds platform/x86: hp_accel: Avoid invoking _INI to speed up resume serial: max310x: unregister uart driver in case of failure and abort net: fujitsu: fix potential null-ptr-deref net: caif: remove BUG_ON(dev == NULL) in caif_xmit char: hpet: add checks after calling ioremap isdn: mISDNinfineon: check/cleanup ioremap failure correctly in setup_io dmaengine: qcom_hidma: comment platform_driver_register call libertas: register sysfs groups properly media: dvb: Add check on sp8870_readreg return media: gspca: properly check for errors in po1030_probe() scsi: BusLogic: Fix 64-bit system enumeration error for Buslogic openrisc: Define memory barrier mb btrfs: do not BUG_ON in link_to_fixup_dir platform/x86: intel_punit_ipc: Append MODULE_DEVICE_TABLE for ACPI drm/amdgpu: Fix a use-after-free net: netcp: Fix an error message net: mdio: thunder: Fix a double free issue in the .remove function net: mdio: octeon: Fix some double free issues net: bnx2: Fix error return code in bnx2_init_board() mld: fix panic in mld_newpack() staging: emxx_udc: fix loop in _nbu2ss_nuke() ASoC: cs35l33: fix an error code in probe() scsi: libsas: Use _safe() loop in sas_resume_port() sch_dsmark: fix a NULL deref in qdisc_reset() MIPS: alchemy: xxs1500: add gpio-au1000.h header file MIPS: ralink: export rt_sysc_membase for rt2880_wdt.c hugetlbfs: hugetlb_fault_mutex_hash() cleanup usb: core: reduce power-on-good delay time of root hub Linux 4.9.271 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I6da4427d9ada52cbebbcc4d69e74f9ecebd9ad8b
69 lines
2.7 KiB
Python
Executable File
69 lines
2.7 KiB
Python
Executable File
#! /usr/bin/env python
|
|
# -*- python -*-
|
|
# -*- coding: utf-8 -*-
|
|
# twatch - Experimental use of the perf python interface
|
|
# Copyright (C) 2011 Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
#
|
|
# This application is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU General Public License
|
|
# as published by the Free Software Foundation; version 2.
|
|
#
|
|
# This application is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# General Public License for more details.
|
|
|
|
import perf
|
|
|
|
def main(context_switch = 0, thread = -1):
|
|
cpus = perf.cpu_map()
|
|
threads = perf.thread_map(thread)
|
|
evsel = perf.evsel(type = perf.TYPE_SOFTWARE,
|
|
config = perf.COUNT_SW_DUMMY,
|
|
task = 1, comm = 1, mmap = 0, freq = 0,
|
|
wakeup_events = 1, watermark = 1,
|
|
sample_id_all = 1, context_switch = context_switch,
|
|
sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU)
|
|
|
|
"""What we want are just the PERF_RECORD_ lifetime events for threads,
|
|
using the default, PERF_TYPE_HARDWARE + PERF_COUNT_HW_CYCLES & freq=1
|
|
(the default), makes perf reenable irq_vectors:local_timer_entry, when
|
|
disabling nohz, not good for some use cases where all we want is to get
|
|
threads comes and goes... So use (perf.TYPE_SOFTWARE, perf_COUNT_SW_DUMMY,
|
|
freq=0) instead."""
|
|
|
|
evsel.open(cpus = cpus, threads = threads);
|
|
evlist = perf.evlist(cpus, threads)
|
|
evlist.add(evsel)
|
|
evlist.mmap()
|
|
while True:
|
|
evlist.poll(timeout = -1)
|
|
for cpu in cpus:
|
|
event = evlist.read_on_cpu(cpu)
|
|
if not event:
|
|
continue
|
|
print "cpu: %2d, pid: %4d, tid: %4d" % (event.sample_cpu,
|
|
event.sample_pid,
|
|
event.sample_tid),
|
|
print event
|
|
|
|
if __name__ == '__main__':
|
|
"""
|
|
To test the PERF_RECORD_SWITCH record, pick a pid and replace
|
|
in the following line.
|
|
|
|
Example output:
|
|
|
|
cpu: 3, pid: 31463, tid: 31593 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31593, switch_out: 1 }
|
|
cpu: 1, pid: 31463, tid: 31489 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31489, switch_out: 1 }
|
|
cpu: 2, pid: 31463, tid: 31496 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31496, switch_out: 1 }
|
|
cpu: 3, pid: 31463, tid: 31491 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31491, switch_out: 0 }
|
|
|
|
It is possible as well to use event.misc & perf.PERF_RECORD_MISC_SWITCH_OUT
|
|
to figure out if this is a context switch in or out of the monitored threads.
|
|
|
|
If bored, please add command line option parsing support for these options :-)
|
|
"""
|
|
# main(context_switch = 1, thread = 31463)
|
|
main()
|